Has the density of sources of gamma-ray burts been constant over the last ten billion years ?

Autor:	Sanejouand, Yves-Henri
Rok vydání:	2018
Předmět:	Physics - General Physics
Druh dokumentu:	Working Paper
Popis:	A generic tired-light mechanism is examined in which a photon, like any particle moving in a medium, experiences friction, that is, a force resisting its motion. If the velocity of light is assumed to be constant, this hypothesis yields a Hubble-like law which is also a consequence of the Rh = ct cosmology. Herein, it is used for estimating matter density as a function of redshift, allowing to show that the density of sources of long gamma-ray bursts appears to be nearly constant, up to z $\approx$ 4. Assuming that the later is a fair probe of the former, this means that matter density has been roughly constant over the last ten billion years, implying that, at least over this period, matter has been in an overall state of equilibrium. Comment: 5 pages, 1 figure
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1803.05303 Zobrazit plný text záznamu View this record from Arxiv