Zobrazeno 1 - 10
of 3 580
pro vyhledávání: '"DATTA, P. K."'
Autor:
Mishra, Arnab, Murmu, Chandra Shekhar, Datta, Kanan K., Choudhuri, Samir, Majumdar, Suman, Nasreen, Iffat, Ali, Sk. Saiyad
Measuring the properties of the intergalactic medium (IGM) and sources during the Epoch of Reionization (EoR) is of immense importance. We explore the prospects of probing the IGM and sources through redshifted 21-cm observations of individual ionize
Externí odkaz:
http://arxiv.org/abs/2408.01681
Publikováno v:
JCAP08(2024)032
It is believed that the first star-forming galaxies are the main drivers of cosmic reionization. It is usually assumed that there is a one-to-one relationship between the star formation rate (SFR) inside a galaxy and the host halo mass in semi-analyt
Externí odkaz:
http://arxiv.org/abs/2311.17062
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
Externí odkaz:
http://arxiv.org/abs/2210.12164
Publikováno v:
J Astrophys Astron 43, 104 (2022)
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:
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:
http://arxiv.org/abs/2202.12308
Autor:
Murmu, Chandra Shekhar, Olsen, Karen P., Greve, Thomas R., Majumdar, Suman, Datta, Kanan K., Scott, Bryan R., Leung, T. K. Daisy, Dave, Romeel, Popping, Gergo, Ochoa, Raul Ortega, Vizgan, David, Narayanan, Desika
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:
http://arxiv.org/abs/2110.10687
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:
http://arxiv.org/abs/2110.06925
Publikováno v:
MNRAS, 507, 2 (2021)
CII line intensity mapping (LIM) is a potential technique to probe the early galaxies from the Epoch of Reionization (EoR). Several experiments e.g. CONCERTO, TIME, CCAT-p are underway to map the CII LIM signal fluctuations from the EoR, enabling us
Externí odkaz:
http://arxiv.org/abs/2107.09072
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:
http://arxiv.org/abs/2101.04925
Autor:
Chakraborty, Arnab, Datta, Abhirup, Roy, Nirupam, Bharadwaj, Somnath, Choudhury, Tirthankar Roy, Datta, Kanan K., Pal, Srijita, Choudhury, Madhurima, Choudhuri, Samir, Dutta, Prasun, Sarkar, Debanjan
Measurement of fluctuations in diffuse HI 21 cm background radiation from the post-reionization epoch (z < 6) is a promising avenue to probe the large-scale structure of the Universe and understand the evolution of galaxies. We observe the European L
Externí odkaz:
http://arxiv.org/abs/2012.04674