Zobrazeno 1 - 10
of 581
pro vyhledávání: '"Bagla, J S"'
Autor:
Bagla, J. S., Gavas, Swati
We study the effect of gravitational clustering at small scales on larger scales by studying mode coupling between virialised halos. We build on the calculation by Peebles (1974) where it was shown that a virialised halo does not contribute any mode
Externí odkaz:
http://arxiv.org/abs/2408.05118
Measurements of the Hubble-Lema\^{i}tre constant ($H_0$) require us to estimate the distance and recession velocity of galaxies independently. Gravitational clustering that leads to the formation of galaxies and the large scale structure leaves its i
Externí odkaz:
http://arxiv.org/abs/2407.10139
Autor:
Bharti, Sauraj, Bagla, J. S.
Publikováno v:
Journal of Astrophysics and Astronomy,2022,Volume 43, Issue 2, article id.95
We describe a simulation for the distribution of galaxies focusing on the atomic Hydrogen content. We aim to make predictions for surveys of galaxies using the redshifted 21 cm line emission. We take the expected distribution of HI masses, circular v
Externí odkaz:
http://arxiv.org/abs/2301.06263
Sheth-Tormen mass function has been widely used to quantify the abundance of dark matter halos. It is a significant improvement over the Press-Schechter mass function as it uses ellipsoidal collapse in place of spherical collapse. Both of these mass
Externí odkaz:
http://arxiv.org/abs/2210.17200
We discuss the wave optical effects in gravitational lens systems with two point mass lenses in two different lens planes. We identify and vary parameters (i.e., lens masses, related distances, and their alignments) related to the lens system to inve
Externí odkaz:
http://arxiv.org/abs/2109.09998
Autor:
Meena, Ashish Kumar, Bagla, J. S.
We study the image formation near point singularities (swallowtail and umbilics) in the simulated strongly lensed images of Hubble Ultra Deep Field (HUDF) by the Hubble Frontier Fields (HFF) clusters. In this work, we only consider nearly half of the
Externí odkaz:
http://arxiv.org/abs/2107.11955
We discuss the prospects of gravitational lensing of gravitational waves (GWs) coming from core-collapse supernovae (CCSN). As the CCSN GW signal can only be detected from within our own Galaxy and the local group by current and upcoming ground-based
Externí odkaz:
http://arxiv.org/abs/2107.02998
We use linear perturbation theory to study perturbations in dynamical dark energy models. We compare quintessence and tachyonic dark energy models with identical background evolution. We write the corresponding equations for different models in a for
Externí odkaz:
http://arxiv.org/abs/2104.00982
Due to the finite amount of observational data, the best-fit parameters corresponding to the reconstructed cluster mass have uncertainties. In turn, these uncertainties affect the inferences made from these mass models. Following our earlier work, we
Externí odkaz:
http://arxiv.org/abs/2103.13617
With increasing sensitivities of the current ground-based gravitational-wave (GW) detectors, the prospects of detecting a strongly lensed GW signal are going to be high in the coming years. When such a signal passes through an intervening lensing gal
Externí odkaz:
http://arxiv.org/abs/2102.03946