Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Kothari, Rahul"'
Autor:
Kothari, Rahul, Maartens, Roy
Publikováno v:
JCAP 05 (2024) 089
Neutral hydrogen intensity mapping can in principle deliver rapid and large-volume cosmological surveys with exquisitely accurate redshifts that are determined directly from imaging. However, intensity maps suffer from very strong foreground contamin
Externí odkaz:
http://arxiv.org/abs/2308.03462
Autor:
Ghosh, Shamik, Jain, Pankaj, Kothari, Rahul, Panwar, Mohit, Singh, Gurmeet, Tiwari, Prabhakar
Publikováno v:
J. Astrophys. Astr. (2023) 44:22
The cosmological principle states that the Universe is statistically homogeneous and isotropic at large distance scales. There currently exist many observations which indicate a departure from this principle. It has been shown that many of these obse
Externí odkaz:
http://arxiv.org/abs/2301.03065
Publikováno v:
EPJC 2024
We study the signal of anisotropy in AGNs/quasars of CatWISE2020 catalogue using different observables. It has been reported earlier that this data shows a strong signal of dipole anisotropy in the source number counts. We test this claim using two i
Externí odkaz:
http://arxiv.org/abs/2208.14397
Publikováno v:
ApJL 924 L36 (2022)
Current cosmological observations point to a serious discrepancy between the observed Hubble parameter obtained using direct and cosmic microwave background radiation (CMBR) measurements. Besides this, the so called Hubble--Lema\^itre tension, we als
Externí odkaz:
http://arxiv.org/abs/2111.02685
Autor:
Kothari, Rahul, Maartens, Roy
Publikováno v:
Class. Quantum Grav. 38, 095013 (2021)
Intensity maps of the 21cm emission line of neutral hydrogen are lensed by intervening large-scale structure, similar to the lensing of the cosmic microwave background temperature map. We extend previous work by calculating the lensing contribution t
Externí odkaz:
http://arxiv.org/abs/2101.11372
Publikováno v:
JCAP 12 (2020) 003
We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in the directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the lensing contribution is ne
Externí odkaz:
http://arxiv.org/abs/2008.02266
We report the experimental evidence in support of room temperature ferromagnetism in Ni doped 3C-SiC. Curie temperature is found to be > 350 K. Temperature dependent Electron paramagnetic resonance (EPR) study reveals that the valence state of Ni is
Externí odkaz:
http://arxiv.org/abs/1912.05921
Bound Magnetic Polarons (BMP) have been proposed to play an important role in doped wide band gap semiconductors. We report the experimental evidence supporting polaronic magnetism and the role of defects on it. Temperature variation of electron para
Externí odkaz:
http://arxiv.org/abs/1910.11899
Autor:
Kothari, Rahul, Nandi, Debottam
Publikováno v:
JCAP10 (2019) 026
Primordial Gravitational waves leave polarization imprints on the Cosmic Microwave Background (CMB). In this article, we investigate polarization bispectrum, which is also referred to as the B-mode auto bispectrum, due to a matter bounce Universe. Fo
Externí odkaz:
http://arxiv.org/abs/1901.06538
Autor:
Kothari, Rahul1,2 (AUTHOR) quantummechanicskothari@gmail.com, Panwar, Mohit3 (AUTHOR), Singh, Gurmeet3 (AUTHOR), Tiwari, Prabhakar4,5 (AUTHOR), Jain, Pankaj6 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Jan2024, Vol. 84 Issue 1, p1-13. 13p.
