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相关论文: Extending the redshift-distance relation in Cosmol…

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The velocity of the Hubble expansion has been added to General Relativity by Moshe Carmeli and this resulted in new equations of motion for the expanding universe. For the first time the observational magnitude-redshift data derived from…

天体物理学 · 物理学 2007-05-23 John G. Hartnett

The concordance (LambdaCDM) model reproduces the main current cosmological observations assuming the validity of general relativity at all scales and epochs, the presence of cold dark matter, and of a cosmological constant, equivalent to a…

宇宙学与河外天体物理 · 物理学 2018-11-08 Guido Risaliti , Elisabeta Lusso

A higher value of Hubble constant has been obtained from measurements with nearby Type Ia supernovae, than that obtained at much higher redshift. With the peculiar motions of their hosts, we find that the matter content at such low redshift…

宇宙学与河外天体物理 · 物理学 2013-07-25 Shuang-Nan Zhang , Yin-Zhe Ma

A generalized quintessence model is presented which corresponds to a richer vacuum structure that, besides a time-dependent, slowly varying scalar field, contains a varying cosmological term. From first principles we determine a number of…

天体物理学 · 物理学 2009-10-31 Pedro F. Gonzalez-Diaz

A general-relativistic theory of cosmology, the dynamical variables of which are those of Hubble's, namely distances and redshifts, is presented. The theory describes the universe as having a three-phase evolution with a decelerating…

天体物理学 · 物理学 2007-05-23 S. Behar , M. Carmeli

We show that there is no need for the hypothetical Dark Energy (DE) and Dark Matter (DM) to explain phenomena attributed to them. In contrast to the consensus of the last decade, we show that the time derivative of the cosmological scale…

宇宙学与河外天体物理 · 物理学 2009-09-15 Shlomo Barak , Elia M Leibowitz

In this paper the four-dimensional space-velocity Cosmological General Relativity of Carmeli is developed by a general solution to the Einstein field equations. The metric is given in the Tolman form and the vacuum mass density is included…

广义相对论与量子宇宙学 · 物理学 2014-07-31 Firmin J. Oliveira

The Hubble diagram (HD) is a plot that contains luminous distance modulus presented with respect to the redshift. The distance modulus--redshift relation of the most well-known ``standard candles'', the type Ia supernovae (SN), is a crucial…

宇宙学与河外天体物理 · 物理学 2023-11-07 Nikita Lovyagin , Rustam Gainutdinov , Stanislav Shirokov , Vladimir Gorokhov

The Friedmann equation is derived for a Newtonian universe. Changing mass density to energy density gives exactly the Friedmann equation of general relativity. Accounting for work done by pressure then yields the two Einstein equations that…

天体物理学 · 物理学 2015-06-24 Thomas F. Jordan

The recent Cosmic Microwave Background (CMB) experiments have shown that the average density of the universe is close to the critical one and the universe is asymptotically flat (Euclidean). Taking into account that the universe remains…

综合物理 · 物理学 2012-07-02 Dimitar Valev

Proceeding of the "HACK100" Conference, 6-10 June 2022, Trieste, Italy - In recent years, quasars have been shown to be reliable standardizable candles, thanks to the non-linear relation between their X-rays and ultraviolet luminosity.…

宇宙学与河外天体物理 · 物理学 2024-01-17 Matilde Signorini , Guido Risaliti , Andrea Sacchi , Elisabeta Lusso , Emanuele Nardini

In cosmology based on general relativity, the universe is modeled as a fluid. The transition from the Einstein field equation to its large-scale (cosmological) version is thus analogous to the transition, for a system consisting of a large…

综合物理 · 物理学 2018-10-18 Gregory Ryskin

Using cosmological relativity theory, we derive the formula for the cosmological redshift written explicitly in terms of 1 - "Omega", where "Omega" = "rho"/"rho"_c is the ratio of the average mass density to the critical "closure" density.…

天体物理学 · 物理学 2007-05-23 Moshe Carmeli

Several key relations are derived for Cosmological General Relativity which are used in standard observational cosmology. These include the luminosity distance, angular size, surface brightness and matter density. These relations are used…

天体物理学 · 物理学 2008-11-26 John G. Hartnett , Firmin J. Oliveira

Recent observations of distant supernovae imply, in defiance of expectations, that the universe growth is accelerating, contrary to what has always been assumed that the expansion is slowing down due to gravity. In this paper a…

天体物理学 · 物理学 2007-05-23 M. Carmeli , S. Behar

Recent measurements of the parameters of the Concordance Cosmology Model ($\Lambda$CDM) done in the low-redshift Universe with Supernovae Ia/Cepheids, and in the distant Universe done with Cosmic Microwave Background (CMB) imply different…

The cosmic curvature, a fundamental parameter for cosmology could hold deep clues to inflation and cosmic origins. We propose an improved model-independent method to constrain the cosmic curvature by combining the constructed Hubble diagram…

宇宙学与河外天体物理 · 物理学 2024-02-19 Tonghua Liu , Shuo Cao , Jia Zhang , Marek Biesiada , Yuting Liu , Yujie Lian

An important concern in the application of gamma-ray bursts (GRBs) to cosmology is that the calibration of GRB luminosity/energy relations depends on the cosmological model, due to the lack of a sufficient low-redshift GRB sample. In this…

天体物理学 · 物理学 2009-11-13 Nan Liang , Wei Ke Xiao , Yuan Liu , Shuang Nan Zhang

In a series of articles, we have shown that the newly discovered plasma-redshift cosmology gives a simpler, more accurate and consistent explanation of many cosmological phenomena than the big-bang cosmology. The SNe Ia observations are in…

天体物理学 · 物理学 2007-05-23 Ari Brynjolfsson

A major recent evelopment in observational cosmology has been an accurate measurement of the luminosity distance-redshift relation out to redshifts z=0.8 from Type Ia supernova standard candles. The results have been argued as evidence for…

天体物理学 · 物理学 2016-01-13 Neil Trentham
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