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Non-negligible dark energy density at high redshifts would indicate dark energy physics distinct from a cosmological constant or ``reasonable'' canonical scalar fields. Such dark energy can be constrained tightly through investigation of…

天体物理学 · 物理学 2015-06-24 Eric V. Linder

We discuss the possibility that dark energy arises from a strongly-coupled Higgs-Yang-Mills set of interacting fields in the non-perturbative regime. We choose the simplest $SU(2)$ representation, which is compatible with the Cosmological…

宇宙学与河外天体物理 · 物理学 2025-05-20 Marco Frasca , Anish Ghoshal , Massimilano Rinaldi

We show that a new force, which appeared in a five-dimensional generalization of general relativity, implies precisely the flat circular velocity curves of luminous matter observed in the outer parts of spiral galaxies. A cosmological…

天体物理学 · 物理学 2007-05-23 R. L. Ingraham , L. A. Cummings

Hubble's name is associated closely with the idea of an expanding universe as he discovered the relation between the recession velocity and distances of galaxies. Hubble also did a lot of pioneering work on the distribution of galaxies in…

科普物理 · 物理学 2009-04-20 J. S. Bagla

In this letter, we consider the possibility of reconciling metric theories of gravitation with violation of the conservation of energy-momentum. Under some circumstances, this can be achieved in the context of unimodular gravity, and it…

广义相对论与量子宇宙学 · 物理学 2017-01-18 Thibaut Josset , Alejandro Perez , Daniel Sudarsky

It is shown by the author that if gravitons are super-strong interacting particles and the low-temperature graviton background exists, the basic cosmological conjecture about the Dopplerian nature of redshifts may be false. In this case, a…

高能物理 - 理论 · 物理学 2007-05-23 Michael A. Ivanov

The property of inertia has never been fully explained. A model for inertia (MiHsC or quantised inertia) has been suggested that assumes that 1) inertia is due to Unruh radiation and 2) this radiation is subject to a Hubble-scale Casimir…

综合物理 · 物理学 2015-06-15 M. E. McCulloch

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

Cosmology is very exciting for three reasons. There is a very successful standard model - the hot big bang - which describes the evolution of the Universe from 10^{-2} sec onward. There are bold ideas, foremost among them are inflation and…

天体物理学 · 物理学 2016-02-09 Michael S. Turner

Barrow proposed that the area law of the entropy associated with a horizon might receive a "fractal correction" due to quantum gravitational effects -- in place of $S\propto A$, we have instead $S\propto A^{1+\delta/2}$, where $0\leqslant…

广义相对论与量子宇宙学 · 物理学 2022-10-25 Sofia Di Gennaro , Yen Chin Ong

Suppose that the early Universe starts with a quantum spacetime originated cosmological $\Lambda$-term at the Planck scale $M_{\rm pl}$. The cosmological energy density $\rho_{_{_\Lambda}}$ drives inflation and simultaneously reduces its…

广义相对论与量子宇宙学 · 物理学 2021-04-27 She-Sheng Xue

Recently much attention has been paid to the discovery of Hubble's law: the linear relation between the rate of recession of the distant galaxies and distance to them. Though we now mention several names associated with this law instead of…

物理学史与哲学 · 物理学 2015-06-19 Ari Belenkiy

The consideration of dark energy's quanta, required also by thermodynamics, introduces its chemical potential into the cosmological equations. Isolating its main contribution, we obtain solutions with dark energy decaying to matter or…

天体物理学 · 物理学 2007-05-23 J. Besprosvany

The acceleration of the cosmic expansion has been discovered as a consequence of redshift Supernovae data. In the usual way, this cosmic acceleration is explained by the presence of a positive cosmological constant or quantum vacuum energy,…

广义相对论与量子宇宙学 · 物理学 2007-05-23 J. -F. Pascual-Sánchez

As the 2015 results of Plancks mission have recently been made available, it is interesting to check the evolution of the scale factor and of the Hubble parameter in the light of these results. Two models in line with Einsteins field…

综合物理 · 物理学 2017-06-08 Guibert U. Crevecoeur

We consider renormalization group flow applied to the cosmological dynamical equations. A consistency condition arising from energy-momentum conservation links the flow parameters to the cosmological evolution, restricting possible…

宇宙学与河外天体物理 · 物理学 2011-11-29 Changrim Ahn , Chanju Kim , Eric V. Linder

The new, simple method is proposed for testing the Hubble law using redshifts and magnitude from magnitude-limited sample of galaxies. The power law relation between redshift and distance have been assumed (cz=r^p). The obtained results:…

天体物理学 · 物理学 2007-05-23 Jacek Choloniewski

One of the most important and surprising discoveries in cosmology in recent years is the realization that our Universe is dominated by a mysterious dark energy, which leads to an accelerating expansion of space-time. A simple generalization…

天体物理学 · 物理学 2007-05-23 Baojiu Li , Ming-Chung Chu , Kai-Chung Cheung , Alfred Tang

One of hot topics in the last years is a systematic discrepancy in the determination of Hubble parameter by various methods. Namely, the values derived "directly" from the distance scale based on Cepheids and supernovae--and referring to…

宇宙学与河外天体物理 · 物理学 2018-04-03 Yurii V. Dumin

We consider the proposal by many scholars and by the International Astronomical Union to rename Hubble's law as the Hubble-Lemaitre law. We find the renaming questionable on historic, scientific and philosophical grounds. From a historical…

物理学史与哲学 · 物理学 2020-10-28 Cormac O'Raifeartaigh , Michael O'Keeffe
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