Results 1 to 10 of about 2,154,842 (330)
Constraining the expansion history of the universe from the red shift evolution of cosmic shear [PDF]
, 2010 We present a quantitative analysis of the constraints on the total equation of state parameter that can be obtained from measuring the red shift evolution of the cosmic shear. We compare the constraints that can be obtained from measurements of the spin two angular multipole moments of the cosmic shear to those resulting from the two dimensional and ...
arxiv +1 more source
The Distribution Of Cosmological $\gamma$-ray Bursts
, 1995 We compare the burst distribution of the new (2B) BATSE catalogue to a cosmological distribution. The observed distribution agrees well with a cosmological one, however, it is insensitive to cosmological parameters such as $\O$ and $\Lambda$.
Cohen, Ehud, Piran, Tsvi
core +1 more source
Formula for red-shift of light signals coming from distant galaxies [PDF]
arXiv, 2005 Relying on the obtained results in Rev.[1](physics/0505035), we derive the formula relating the red-shift of light signals coming from distant galaxies to the distance of these galaxies from us and the time of detecting of these light signals. The red-shift coefficient, instead of the Hubble parameter, is introduced. It varies with time and positive at
arxiv
An overview on the quasar redshifts
Revista Técnica de la Facultad de Ingeniería, 2011 An overview of the foundations of modem cosmology a well as the controversies about physical association between high-red shift quasi-stellar objects and low-red shift galaxies are presented. This kind of evidence challenges the current velocity-distance
Williams Pitter +4 more
doaj
Red-Shift Distribution of Gamma-ray Bursts and Their Progenitors [PDF]
arXiv, 2007 Gamma ray bursts have been divided into two classes, long-soft gamma ray burst and short-hard gamma ray burst according to the bimodal distribution in duration time. Due to the harder spectrum and the lack of afterglows of short-hard bursts in optical and radio observations, different progenitors for short-hard bursts and long-soft bursts have been ...
arxiv
Pressure Shift and Gravitational Red Shift of Balmer Lines in White Dwarfs. Rediscussion [PDF]
, 2015 The Stark-induced shift and asymmetry, the so-called pressure shift (PS) of $H_\alpha$ and $H_\beta$ Balmer lines in spectra of DA white dwarfs (WDs), as masking effects in measurements of the gravitational red shift in WDs, have been examined in detail. The results are compared with our earlier ones from before a quarter of a century (Grabowski et al.
arxiv +1 more source
Results in Physics, 2020 In this paper, we explore the second harmonic generation (SHG) in a lens-shaped InAs/GaAs quantum core/shell (LSQCS). The three-dimensional Schrödinger equation is given under the framework of the effective mass approximation and it is solved by using ...
D. Makhlouf +3 more
doaj
Einstein's Equivalence Principle and the Gravitational Red Shift II [PDF]
arXiv, 2013 Long before the general theory of relativity was finally formulated in 1916, arguments based entirely on Einstein's equivalence principle predicted the well known phenomenon of the gravitational red shift. Precisely the same arguments are widely being used today to derive the same phenomenon.
arxiv
Red Shift in a Laboraory Environment
, 2011 A hypotheses of energy loss for polarization of e-e+ vacuum by a photon passing interstellar space is considered. An excitation and relaxation of vacuum can't run with speed of light due to very small but finite fraction of e-e+ pair mass that creates a retardment in recuperation of deposited energy back to photon.
Yatsunenko, Yuriy A., Budagov, Julian A.
openaire +2 more sources
Scientific Reports, 2019 A tunable terahertz (THz) chain-link metamaterial (CLM) is presented, which is composed of a tailored Au layer fabricated on Si substrate. CLM exhibits bidirectional polarization-dependent characteristic by applying a direct-current (dc) bias voltage on ...
Pengyu Liu +6 more
doaj +1 more source