Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Kanan K Datta"'
Publikováno v:
Letters in High Energy Physics, Vol 2021, Iss 1 (2021)
The EDGES experiment related to the observant of brightness temperature \(T_{21}\) of 21cm line arising from ground state of neutral Hydrogen atom, has shown an excess absorption feature ( \(− 500^ {+200}_{ − 500}\) mK) in \(T_{21}\) spectrum cor
Externí odkaz:
https://doaj.org/article/9c5d921bff884acda0f15f3ea80054c8
Publikováno v:
Journal of Astrophysics and Astronomy. 44
In this review article, we briefly outline our current understanding of the physics associated with the HI 21-cm signal from cosmic dawn. We discuss different phases of cosmic dawn as the ambient gas and the background radiations evolve with the reds
Autor:
Chandra Shekhar Murmu, Karen P Olsen, Thomas R Greve, Suman Majumdar, Kanan K Datta, Bryan R Scott, T K Daisy Leung, Romeel Davé, Gergö Popping, Raul Ortega Ochoa, David Vizgan, Desika Narayanan
Publikováno v:
Murmu, C S, Olsen, K P, Greve, T R, Majumdar, S, Datta, K K, Scott, B R, Leung, T K D, Dave, R, Popping, G, Ochoa, R O, Vizgan, D & Narayanan, D 2023, ' Revisiting the [C II] 158µm line-intensity mapping power spectrum from the EoR using non-uniform line-luminosity scatter ', Monthly Notices of the Royal Astronomical Society, vol. 518, no. 2, pp. 3074-3082 . https://doi.org/10.1093/mnras/stac3304
Detecting the line-intensity mapping (LIM) signal from the galaxies of the Epoch of Reionization is an emerging tool to constrain their role in reionization. Ongoing and upcoming experiments target the signal fluctuations across the sky to reveal sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e36d73bfb3ba69dfb96de0991922b3cb
https://orbit.dtu.dk/en/publications/48637e77-fd19-4389-bb14-93ee7abf96df
https://orbit.dtu.dk/en/publications/48637e77-fd19-4389-bb14-93ee7abf96df
The Epoch of Reionization (EoR) remains a poorly understood cosmic era for the most part. Yet, efforts are still going on to probe and understand this epoch. We present a review of the latest developments in the techniques (especially line-intensity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb67e46ae0f8b76a6d928c5094c7b449
http://arxiv.org/abs/2210.09612
http://arxiv.org/abs/2210.09612
It is extremely important to understand the processes through which the thermal state of the inter-galactic medium (IGM) evolved in the early universe in order to study the evolution of HI 21-cm signal during cosmic dawn. Here, we consider the heatin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc58dbe3927d25ba20ddcc6d23b749a9
The HI 21-cm optical depth ($\tau_b$) can be considerably large as the kinetic and spin temperature of the inter-galactic medium (IGM) is expected to be very low during cosmic dawn. It will be particularly higher at regions with HI over-density. We r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e2c6e9f97b6473b975c9a20d426a649
http://arxiv.org/abs/2110.06925
http://arxiv.org/abs/2110.06925
Autor:
Tirthankar Roy Choudhury, Nirupam Roy, Kanan K. Datta, Srijita Pal, Somnath Bharadwaj, Abhirup Datta, Samir Choudhuri, Prasun Dutta, Arnab Chakraborty, Huib Intema, Madhurima Choudhury
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 490:243-259
Understanding the low-frequency radio sky in depth is necessary to subtract foregrounds in order to detect the redshifted 21 cm signal of neutral hydrogen from the Cosmic Dawn, Epoch of Reionization (EoR) and post-reionization era. In this second pap
Publikováno v:
Letters in High Energy Physics, Vol 2021, Iss 1 (2021)
The EDGES experiment related to the observant of brightness temperature \(T_{21}\) of 21cm line arising from ground state of neutral Hydrogen atom, has shown an excess absorption feature ( \(− 500^ {+200}_{ − 500}\) mK) in \(T_{21}\) spectrum cor
Weakly Interacting Massive Particles (WIMPs) are considered to be one of the favoured dark matter candidates. Searching for any detectable signal due to the annihilation and decay of WIMPs over the entire electromagnetic spectrum has become a matter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e80b659cf5753fe5e5b7c570f632689e
The EDGES experiment has observed an excess trough ($-500^{+200}_{-500}$ mK) in the brightness temperature $T_{21}$ of the 21cm absorption line of neutral Hydrogen atom (HI) from the era of cosmic dawn ($z \simeq 17.2$). We consider possible interact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5015c7d61baa8b4d893f9fef0b35768b
http://arxiv.org/abs/2008.09972
http://arxiv.org/abs/2008.09972