Hubble constant tension

Exploring the Hubble tension - CERN Courie

  1. This explains your current interest in the Hubble constant. What do you define as the Hubble tension? Yes, indeed. When I was a PhD student, knowing the Hubble constant at the 40-50% level was great. Now, we are declaring a crisis in cosmology because there is a discrepancy at the very-few-percent level. The Hubble tension is certainly one of the most intriguing problems in cosmology today
  2. The Hubble tension revolves around the value of a constant in cosmology called the Hubble Constant, which can be thought of as a measure of how quickly the universe is expanding. It's an extremely important quantity that characterises fundamental features of the universe such as its age, and the size of the observable universe
  3. ed by their redshift, a shift of the light they emit toward the red end of the visible.
  4. Point 3. stresses both the importance of Pantheon Hubble flow SNeIa and the danger associated to a misuse of the SH0ES H0 prior. Simplifying a bit, if one wants to solve the H0 tension, one should get a high H0 from CMB (temperature+polarization)+BAO+Pantheon without the aid of a SH0ES H0 prior. Nothing new so far
  5. Results: The experimental results of measuring the Hubble constant presented in the scientific literature are analyzed using the proposed information approach. Conclusion: The information approach can be considered as an additional look at the Hubble constant tension
  6. The rate at which the universe is expanding is called the Hubble constant, named for UChicago alum Edwin Hubble, SB 1910, PhD 1917, who is credited with discovering the expansion of the universe in 1929. Scientists want to pin down this rate precisely, because the Hubble constant is tied to the age of the universe and how it evolved over time

The Hubble Tension - A Sign of New Physics in Cosmology

  1. g the standard cosmologicalmodel. Whether this tension represents new physics or systematic effects is thesubject of intense debate
  2. $\begingroup$ Regarding: The difference between the two values should be zero if the cosmological model is correct, there are other possibilities to explain this discrepancy. (1) There is something wrong with the astronomical yard stick, that may yet turn out to be identified and corrected. (2) There is something wrong with the theory regarding the CMB variability that may yet turn out to.
  3. ations of from local measurements of distances and redshifts
  4. ble tension. The values of Hubble constant from Planck and HST show a signi cant di erence. There are some ways to explain it, but we do not know which is correct. But one thing is clear, the universe is not simple as we thought. [1]Vennin, Vincent. (2014). Cosmological In ation: Theo-retical Aspects and Observational Constraints. [2]arXiv:1807.0620
  5. Freedman and colleagues argue that to resolve the tension, astronomers must locally measure the Hubble constant to a precision better than 1%. That's out of reach for now, but in just a couple years, the European Space Agency's Gaia mission will be providing trustworthy and exquisitely precise distances to a heap of red giant stars, allowing a far better calibration than what is possible now

One of the most prominent issues in cosmology is the so-called Hubble Tension. It represents an unsolved issue in cosmology: Measurement of the Hubble constant H 0, which tells us how fast the Universe is expanding, do not agree with each other Hubble Constant, H 0 The time-dependent expansion of spacetime is characterized in the FLRW equations as a function of redshift z by the Hubble parameter H(z). Under the assumption of ΛCDM, H(z) = H 0 * sqrt(Ω m (1+z) 3 + Ω Λ + Ω k (1+z) 2 ) (e.g. Wei & Wu 2017 , Chen, Kumar & Ratra 2017 , Verde et al. 2014 , Farooq & Ratra 2013 )

Cosmologists also use the variations to predict the rate at which the Universe is currently expanding, a measure known as the Hubble constant after the US astronomer Edwin Hubble Title: On the Hubble constant tension in the SNe Ia Pantheon sample. Authors: Maria Giovanna Dainotti, Biagio De Simone, Tiziano Schiavone, Giovanni Montani, Enrico Rinaldi, Gaetano Lambiase (Submitted on 3 Mar 2021 , last revised 20 May 2021 (this version, v4) The Hubble constant (H 0) tension between Type Ia supernovae (SNe Ia) and Planck measurements ranges from 4 to 6σ. To investigate this tension, we estimate H 0 in the ΛCDM and CDM (cold dark matter) models by dividing the Pantheon sample, the largest compilation of SNe Ia, into 3, 4, 20, and 40 bins

(PDF) Cosmology Intertwined II: The Hubble Constant Tension

The most influential measurements of the late universe, coming from a project called Supernova H0 for the Equation of State (SH0ES), peg the Hubble constant at about 74 The above summary shows that values of the Hubble constant obtained in this way lie around the 67 to 68 km/s/Mpc mark, with small changes if other measures are included. According to the very latest Planck paper on cosmological parameter estimates the headline determination is H 0 = (67.8 +/- 0.9) km/s/Mpc The latest reported measurements for the evaluation of the Hubble constant by two different teams, the Riess et al. (2019) in USA and the Plank Collaboration (2018) in Europe, in spite of increased accuracy of measurements, have resulted in significantly different values. This tension between the results of the two different measurement methodologies has been a vexing puzzle Hubble Tension - The Plot Thickens. Posted in The Universe and Stuff with tags arXiv:2106.15656, Hubble constant, Hubble Constant Tension, Wendy Freedman on July 2, 2021 by telescoper. One topic on this blog seems to be as perennial as the weeds in my garden: the so-called Hubble Tension

Hubble's law - Wikipedi

The Hubble Constant Tension: a Status Update with Daniel J. Mortlock, HiranyaV. Peiris, Andrew R. Williamson, SamayaM. Nissanke, Justin Alsing,Dan Scolnicand. The description is complex, but it has only a handful of (specifically, six!) tunable parameters, including, for example, how much of the universe is made of ordinary vs. dark matter. From these six parameters, you can derive the Hubble constant: H0 = 67.8 ± 0.9 km/s /Mpc. (Phew! 12 March 2021 : Stephen Feeney (Department of Physics and Astronomy, University College London, UK)Our best estimate of the Universe's current expansion rate..

What is the Hubble tension, really? A SH0ES-centric view

Does the Hubble constant tension call for new physics? Edvard M ortsell and Suhail Dhawan Oskar Klein Centre, Department of Physics, Stockholm University, SE 106 91 Stockholm, Sweden E-mail:edvard@fysik.su.se,suhail.dhawan@fysik.su.se Received February 8, 2018 Revised June 7, 2018 Accepted September 2, 2018 Published September 17, 2018 Abstract Non-theist. One of the crucial parameters for our understanding of how fast the universe is expanding is called the Hubble constant. This is one of the parameters that is involved in figuring out the age of the universe and has been a number a LOT of research has been focused on for decades. For the last decade or so, there has been a 'tension. Tension, problem, crisis, surd — there has been a Hubble constant something for 90 years, ever since the American astronomer Edwin Hubble's plots of the distances and recessional speeds of galaxies showed that space and everything in it is receding from us (Hubble's own refusal to accept this conclusion notwithstanding) Does the Hubble constant tension call for new physics? Edvard M ortsell, aSuhail Dhawan aOskar Klein Centre, Department of Physics, Stockholm University, SE 106 91 Stockholm, Sweden E-mail:edvard@fysik.su.se,suhail.dhawan@fysik.su.se Abstract. The Cold Dark Matter model (CDM) represents the current standard model in cosmology The standard cosmological model determined from the accurate cosmic microwave background measurements made by the Planck satellite implies a value of the Hubble constant ${H}_{0}$ that is 4.2 standard deviations lower than the one determined from type Ia supernovae. The Planck best fit model also predicts higher values of the matter density fraction ${\mathrm{\ensuremath{\Omega}}}_{m}$ and.

Hubble Constant Tension in Terms of Information Approach

It is generally accepted that the Universe is dominated by dark energy but the different methods to measure the Hubble constant disagree, giving origin to what is known as the Hubble tension. Tension in the Hubble constant. There has been some hand-wringing of late about the tension between the value of the expansion rate of the universe - the famous Hubble constant, H 0, measured directly from observed redshifts and distances, and that obtained by multi-parameter fits to the cosmic microwave background The model dependent and independent measurements of the Hubble constant H0 are in a 4.4σ tension, which increases to 5.3 σ after the inclusion of independent time-delay cosmography data. This tension has been one of the most important discordance in cosmology, suggesting unknow

The Hubble constant (H 0) estimated from the local Cepheid-supernova distance ladder is in 3 − σ tension with the value extrapolated from cosmic microwave background (CMB) data assuming the standard cosmological model.Whether this tension represents new physics or systematic effects is the subject of intense debate. Here, we investigate how new, independent H 0 estimates can arbitrate this. A new class of normalized Hubble expansion h (z) is parameterized by a gravitational coupling constant g to Λ = (1 − q) H 2 derived non-locally from H. Some recent observational support derives from hints of holography at the limit of unparticle cosmology , , - away from ΛCDM as suggested by the swampland conjectures , The team's new measurement of the Hubble constant, or the expansion rate of the universe, involved a different method. They used NASA's Hubble Space Telescope (HST) in combination with W. M. Keck Observatory's Adaptive Optics (AO) system to observe three gravitationally-lensed systems In recent years, with the advent of new technology, the accuracy in measurement of the Hubble constant has improved tremendously. But this has led to a recent tension that could indicate either the need for new physics or for as-yet unaccounted for uncertainties in the measurements

Ongoing Hubble Tension in Expanding Universe Debate

A new Hubble constant determination obtained by an international team including researchers from DARK (Niels Bohr Institute) and based on an alternative calibration of type Ia supernovae suggests that the Hubble constant tension may be weaker than we thought. Astronomical observations suggest that we are living in a ΛCDM universe, which is. Cosmologists have been struggling to understand an apparent tension in their measurements of the present-day expansion rate of the universe, known as the Hubble constant. Observations of the early. Hubble constant of 73 kmysec per Mpc, the expansion age of the universe is 9 billion years for an Einstein de-Sitter universe (where V0 5 1, VL 5 0). In an open universe, with V0 5 0.3 and VL 5 0, the age is calculated to be 11 billion years. Finally

The Hubble constant (H 0) tension between Type Ia Supernovae (SNe Ia) and Planck measurements ranges from 4 to 6 σ. To investigate this tension, we estimate H 0 in the ΛCDM and w 0 w a CDM. currently to measure the Hubble Constant, and the discrepancies in this measurement which is famously referred to as the Hubble tension. We will cover some of the ways in which scientists have attempted to resolve this discrepancy. We will also go through some gravitational wave measurements in the future that would help in resolving the Hubble. Putting these together, the best measurement of the Hubble Constant is 73 km/s/Mparsec. This is in conflict with the other main way of measuring the Hubble Constant, analyzing makeup of the Cosmic Microwave Background (CMB) radiation, which yields a value of 68 km/s/Mparsec. The difference is statistically significant, and well outside the. Abstract. Estimates of the Hubble constant, H 0 H 0 likelihoods. Evaluating the tails of the local H 0 likelihood requires the use of non-Gaussian distributions to faithfully represent anchor likelihoods and outliers, and simultaneous fitting of the complete distance-ladder data set to ensure correct uncertainty propagation. We have hence developed a Bayesian hierarchical model of the full.

0 constant is needed to estimate not only the expansion rate of the universe but also its age and its future destiny in terms of evolution. Despite the wide acceptance of the ΛCDM model in the scientific community, there are several open problems that this model struggles with, in particular the Hubble constant tension. The Within this, there is a tension between the value of the Hubble constant, H-0, inferred from local distance indicators and the angular scale of fluctuations in the Cosmic Microwave Background (CMB). In terms of Bayseian evidence, we investigate whether the tension is significant enough to warrant new physics in the form of modifying or adding energy components to the standard cosmological model The tension of the Hubble constant can be explained by some intrinsic dependence of this constant on the distance of the objects that you use. Additionally, the researchers found that their analysis of the Hubble constant changing with redshift allows them to smoothly connect the value of constant from the early universe probes and the value from the late universe probes, Rinaldi said Currently the tension between the early and late measurements of the Hubble constant sits between 4 to 6 sigma, depending on which set of measurements you combine. While there are still many who believe there is something wrong with the measurements, others have started to take seriously that this is pointing to a real issue with ΛCDM, and there is something in the universe we don't understand

Gravitational-lensing measurements push Hubble-constant discrepancy past 5σ. If the tension can't be attributed to systematic errors, it could be a sign of new cosmological physics. Little is known about what dark matter and dark energy, the dominant components of the universe, really are, but the standard model of Big Bang cosmology, known. The tension of the Hubble constant can be explained by some intrinsic dependence of this constant on the distance of the objects that you use. Additionally,. More information: M. G. Dainotti et al, On the Hubble Constant Tension in the SNe Ia Pantheon Sample, The Astrophysical Journal (2021). DOI: 10.3847/1538-4357/abeb73 Journal information. By Adam Mann July 06, 2021. Astronomer suggests that the latest observations of red giants could be closing the gap on the Hubble tension. The red giant star Camelopardalis, located in the. In this Letter of Interest we will focus on the 4.4 σ 4.4\sigma 4. 4 σ tension between the Planck estimate of the Hubble constant H 0 H_0 H 0 and the SH0ES collaboration measurements

Willie Taggart and the Hubble Constant Tension. Posted on November 20, 2019 by cbcrenshaw. There's a problem with the universe. Some people here in my hometown feel that way because the Seminoles are losing football games, but I'm talking about the real universe, the one out there The most statistically significant tension is in the estimation of the Hubble constant H 0 between. the CMB, assuming a Λ CDM model, and the direct local distance ladder measurements. In. Our value of the Hubble constant, Ho = 69.8, with statistical and systematic uncertainties of 0.8 and 1.7 km/sec/Mpc, respectively, falls midway between the value obtained from the Planck Cosmic Microwave Background analysis, and that obtained using Cepheids. I will address the uncertainties, andthe discuss the current tension in Ho It's located in the Andromeda galaxy (M31), 2.5 million light-years away. NASA's Roman Space Telescope will help resolve the disagreement by exploring the problem much more precisely than ever before. It will trace the expansion history of the universe, helping us see how the rate of expansion changed from some of the earliest stages of. The $\\Lambda$ Cold Dark Matter model ($\\Lambda$CDM) represents the current standard model in cosmology. Within this, there is a tension between the value of the.

Snowmass2021 - Letter of interest cosmology intertwined II: The hubble constant tension. Astroparticle Physics. J. Solà Peracaula. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 9 Full PDFs related to this paper. Read Paper これらは双方とも正しいと思われる一方で,有意な齟齬があり誤差範囲でも溝を埋められないため,Hubble constant tension (ハッブル定数の推定における緊張関係) とか Hubble tension と呼ばれています.ただし CMB を用いる方法はビッグバンから約38万年後の初期宇宙の姿を用いて推定される値 (右図の.

A (Hubble) Tension Headache conference diary. Sunny Vagnozzi. March 1, 2021. As in last week's post with TMCC2021, this week I will also be live-blogging the A (Hubble) Tension Headache conference from Southampton. As a clarification note, the conference features four plenary live talks, and a bunch of pre-recorded talks, both. Recently, models with positive spatial curvature have too enriched the discussion on the Hubble tension (Di Valentino, Melchiorri & Silk 2019). Including the fundamental constant variations may alleviate the discrepancies in lensing in a similar way to that of a closedUniverse

Prospects for resolving the Hubble constant tension with

Given the crucial role of the Hubble constant as prior for CMB analyses, we also anticipate discussing synergies with ongoing and planned CMB experiments. To round off the workshop, we plan to have a long panel discussion aimed at clarifying any further questions related to the Hubble tension and the evidence it is based on We apply a tension metric Q UDM , the update difference in mean parameters, to understand the source of the difference in the measured Hubble constant H 0 inferred with cosmic microwave background (CMB) lensing measurements from the Planck satellite (H 0 =67.9 -1.3 +1.1 km /s /Mpc ) and from the South Pole Telescope (H<SUB>0</SUB>=72.0<SUB>-2.5</SUB><SUP>+2.1</SUP> km /s /Mpc ) when both are. The Hubble Constant is a central feature of any theory about the evolution and ultimate fate of the universe. This number may have zero effect on daily human existence, but there's a lot at.

cosmology - What is the meaning of Hubble tension

Using data from the Hubble telescope, they calculated that the Hubble constant should be 69.8±0.81.8 km s -1 Mpc - 1, which is midway between results from the two rival camps. Radek Wojtak at the University of Copenhagen reckons that the tension between the two approaches means we are getting closer to the stage when changes to the standard model of cosmology should be considered Review of the Early Dark Energy proposal by Sunny Vagnozzi; suggesting a different context: [2001.02451] Is the Hubble tension a hint of AdS around recombination? One of the most promising solutions was proposed by Marc Kamionkowski's group in Poulin et al., and envisages a phase of early dark energy (EDE) behaving as a cosmological constant at early times, before redshifting away faster. This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy. Close this notificatio

The Call of Dark Sirens in Precision CosmologyThe Hubble constant tension with next generation galaxy

Topics: calibration: geometrical, tension, cosmological model: parameter space, Hubble constant, new physics, dark matter: density, sensitivity, satellite: Planck. Figure 73.3 + or_ 2.5 Km/sec/Mpc can be granted as standard Hubble constant beside all other values having own origin with justification.Merge of neutron stats viewed by gravitational wave simultaneòusly calculating with cosmic microwave back ground temperature can verify the fact even supported by some form òf dark energy parþicle accumulating to add fraction of mass to total.Thus giving. Hubble tension is the difference in results that scientists get when they try to measure the rate at which our Universe expands. Find out how a new study may have split the difference and loosened the tension between two camps of researchers. (4:00 min read The figure astronomers derive for the Hubble Constant using a wide variety of cutting-edge observations to gauge distances across the cosmos is 73.5 km/s/Mpc, with an uncertainty of only two percent. These measurements are shown in blue. Alternatively, the Hubble Constant can also be estimated from the cosmological model that fits observations. Latest Hubble Measurements Suggest Disparity in Hubble Constant Calculations is not a Fluke 25 April 2019 Hubble's measurements of today's expansion rate do not match the rate that was expected based on how the Universe appeared shortly after the Big Bang over 13 billion years ago

Gravitational wave cosmology: measuring the Hubble

[2103.01183] In the Realm of the Hubble tension $-$ a ..

New Wrinkle Added to Cosmology's Hubble Crisis. A problem confronts cosmology: Two independent measurements of the universe's expansion give incompatible answers. Now a third method, advanced by an astronomy pioneer, appears to bridge the divide. Antares, seen at center, is a red supergiant star near the end of its life The present relative expansion rate of the universe, the Hubble constant, is a key parameter in cosmology. In the last few years, increasing tension has been observed between the values from direct measurements in the local universe and those inferred from the early universe assuming a standard cosmological model. This tension now exceeds 5 sigma, depending on which measurements are considered. The Hubble constant (H0) estimated from the local Cepheid-supernova (SN) distance ladder is in 3-σ tension with the value extrapolated from cosmic microwave background (CMB) data assuming the standard cosmological model. Whether this tension represents new physics or systematic effects is the subject of intense debate. Here, we investigate how new, independent H0 estimates can arbitrate this.

Hubble Constant Tension in Terms of Information Approach Boris Menin1* 1Mechanical and Refrigeration Consultation Expert, 9 Yakov Efrat St., Beer-Sheba 8464209, Israel. Author's contribution The sole author designed, analysed, interpreted and prepared the manuscript The Hubble constant (H-0) estimated from the local Cepheid-supernova distance ladder is in 3-sigma tension with the value extrapolated from cosmic microwave background (CMB) data assuming the standard cosmological model. Whether this tension represents newphysics or systematic effects is the subject of intense debate Posted on Oct 23, 2019 in Astronomy, Cosmology, News, Physics, Science, Space. While the Hubble Constant is constant everywhere in space at a given time, it is not constant in time. explains.

The Hubble Tension. With all of this research seemingly providing no way to branch between the values spotted, scientists have dubbed this the Hubble tension. And it seriously puts into question our understanding of the Universe He still emphatically claims tension of 5 sigma between direct distance ladder Hubble (late universe) and CMB (early universe extrapolations). It'll definitely be interesting to see how it pans out. More time and more data, I suppose. No matter what, something interesting is going on. Feb 7, 2020

Measurements of the Hubble constant don't line up. Scientists debate what that means. Early Dark Energy can Resolve the Hubble Tension. Physical Review Letters. Vol. 122, June 7, 2019,. The Hubble constant knows—but until the tension is resolved, the answer is unclear. A Hubble Space Telescope image of the Cepheid variable star RS Puppis

Astronomy 1101

46 galactic objects show a linear correlation (the Hubble law) with a constant of proportionality (the Hubble constant) of around 500 km s-1 Mpc-1, much larger than currently accepted values of around 70 km s-1 Mpc-1 due to significant errors in the original distance data. (1.3) Note that is simply the Hubble parameter as measured currently ( ) What all this means is that the tension in Hubble's constant offers us a lesson in how science progresses. Cosmologists have a paradigm they love and it mostly works Hubble's initial value for the expansion rate, now called the Hubble Constant, was approximately 500 km/s/Mpc or about 160 km/sec per million-light-years. The expansion age of the Universe inferred from this was only 2 Gyr, but by the 1930's, radioactive dating of rocks had already shown geologists that the age of the Earth was 3 Gyr

Cosmologists have been struggling to understand an apparent tension in their measurements of the present-day expansion rate of the universe, known as the Hubble constant. Observations of the early Figure 1 from [1910.02978] Investigating the Hubble Constant Tension — Two Numbers in the Standard Cosmological Model This is from the paper [1903.07603] Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM , figure 4, page 22

the potential of next-generation spectroscopic galaxy surveys to shed light on the Hubble constant tension. Surveys such as those with Euclid and the Square Kilometre Array (SKA) are expected to reach sub-percent precision on Baryon Acoustic Oscillation (BAO) measure-ments of the Hubble parameter, with a combined redshift coverage of 0:1 <z<3. Thi Gravitational wave (GW) and electromagnetic (EM) observations of neutron-star-black-hole (NSBH) mergers can provide precise local measurements of the Hubble constant (${H}_{0}$), ideal for resolving the current ${H}_{0}$ tension. We perform end-to-end analyses of realistic populations of simulated NSBHs, incorporating both GW and EM selection for the first time

Tension Over Hubble Constant Continues - Sky & Telescop

Considerable progress has been made in determining the Hubble constant over the past two decades. We discuss the cosmological context and importance of an accurate measurement of the Hubble constant, focusing on six high-precision distance-determination methods: Cepheids, tip of the red giant branch, maser galaxies, surface brightness fluctuations, the Tully-Fisher relation, and Type Ia. Hi, there is a recent study that explains the Hubble tension by invoking we are sitting inside a sub- average density void. It also claims that such a void falsifies the standard model of cosmology with a 7 sigma confidence interval, but it is readily explained by MONDian kind of modified gravity cosmology Hubble constant tension. Most likely, this will help to understand the current situation and identify possible specific ways to solve it. 17 18 Keywords: baryonic acoustic oscillations, brightness of standard candles, cosmic microwave 19 background, Hubble constant, information theory, mathematical modelling, measurement, 20 uncertainty 2 The Λ Cold Dark Matter model (ΛCDM) represents the current standard model in cosmology. Within this, there is a tension between the value of the Hubble constant, H0, inferred from local distance indicators and the angular scale of fluctuations in the Cosmic Microwave Background (CMB). In terms of Bayseian evidence, we investigate whether the tension is significant enough to warrant new.

Is the Hubble Tension actually a Temperature Tension

With compare to it, the newly published AvERA model can resolve the emerging tension between local Hubble constant measurements and the Planck best-fitting cosmology (YT animation). Unlike conventional simulations with a smoothly expanding universe, taking the structure into account led to a AvERA model where different regions of the cosmos expand at different rate We try to reconcile the tension between the local 2.4 % determination of Hubble constant and its global determination by Planck CMB data and BAO data through modeling the dark energy variously. We find that the chi-square is significantly reduced by $$\\Delta \\chi ^2_\\text {all}=-6.76$$ Δ χ all 2 = - 6.76 in the redshift-binned dark energy model where the $$68~\\%$$ 68 % limits of the. Title题目 Hubble tension or a late fundamental physics transition? Speaker 报告人 Leandros Perivolaropoulos (University of Ioannina) Date 日期 2021年09月30日 15:0 Three Steps to Measuring the Hubble Constant. This illustration shows the three steps astronomers used to measure the universe's expansion rate to an unprecedented accuracy, reducing the total uncertainty to 2.4 percent. Astronomers made the measurements by streamlining and strengthening the construction of the cosmic distance ladder, which is. Code used in arXiv:1707.00007 (Clarifying the Hubble constant tension with a Bayesian hierarchical model of the local distance ladder); arXiv:1802.03404 (Prospects for resolving the Hubble constant tension with standard sirens); and arXiv:1811.11723 (Unbiased Hubble constant estimation from binary neutron star mergers). Stephen Feeney.

This dark energy differs from the cosmological constant by w0= -0.03±0.05 and wa= -0.79±0.08, sufficient to account for the value of the 'Hubble Tension' between early and late universe H0 values. An information energy model will fit most observations as well as Ʌ, and also resolve Hubble tension and cosmological coincidence problems Private Look: the Hubble Constant Tension . ABSTRACT Aims: The purpose of this work is to formulate the theoretically justified information approach to analyze different methods of measuring Hubble's constant, and to verify their advantages and disadvantages TheSkySearchers.com. Come join the newest and most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our Astro goods vendors The Tension over the Hubble-Lemaitre Constant, Cosmology 2020 - The Current State, Michael L. Smith, IntechOpen, DOI: 10.5772/intechopen.91266. Available from: Over 21,000 IntechOpen readers like this topic. Help us write.

Birrer: Hubble constant tension: update from the strong lensing time-delay cosmography front / Huang: Searching for axion strings with CMB and lensing Feb 18, 2020 - 11:00 am to 12:00 pm Locatio The Hubble tension between the early and late universe may be the most exciting development in cosmology in decades, said lead researcher and Nobel a value called the Hubble constant The Hubble constant is calculated by comparing distance values to the apparent recessional velocity of the target galaxies — that is, how fast galaxies seem to be moving away. The team's calculations give a Hubble constant of 69.8 km/sec/Mpc — straddling the values derived by the Planck and Riess teams The tensions between the values of Hubble constant obtained from the early and the late Universe data pose a significant challenge to modern cosmology. Possible modifications of the flat homogeneous isotropic cosmological {\Lambda}CDM model are considered, in which the Universe contains dark energy, cold baryonic matter and dark matter The evolution of measurements of the rate of the Universe's expansion, given by the so-called Hubble Constant, over the past two decades. The slightly esoteric units give the velocity of the expansion in km/s for every million parsecs (Mpc) of separation in space, where a parsec is equivalent to 3.26 light-years

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