Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Kamran, Mohd."'
The neutral hydrogen (HI) power spectrum, measured from intensity fluctuations in the 21-cm background, offers insights into the large-scale structures (LSS) of our Universe in the post-reionization era (redshift $z<6$). A significant amount of HI is
Externí odkaz:
http://arxiv.org/abs/2409.05187
Autor:
Noble, Leon, Kamran, Mohd, Majumdar, Suman, Murmu, Chandra Shekhar, Ghara, Raghunath, Mellema, Garrelt, Iliev, Ilian T., Pritchard, Jonathan R.
The morphology of the 21-cm signal emitted by the neutral hydrogen present in the intergalactic medium (IGM) during the Epoch of Reionization (EoR) depends both on the properties of the sources of ionizing radiation and on the underlying physical pro
Externí odkaz:
http://arxiv.org/abs/2406.03118
Autor:
Dasgupta, Saswata, Pal, Samit Kumar, Bag, Satadru, Dutta, Sohini, Majumdar, Suman, Datta, Abhirup, Pathak, Aadarsh, Kamran, Mohd, Mondal, Rajesh, Sarkar, Prakash
Publikováno v:
JCAP, Vol. 2023, May 2023
We analyse the evolution of the largest ionized region using the topological and morphological evolution of the redshifted 21-cm signal coming from the neutral hydrogen distribution during the different stages of reionization. For this analysis, we u
Externí odkaz:
http://arxiv.org/abs/2302.02727
Autor:
Khan, Vakeel A.1 vakhanmaths@gmail.com, Kamran, Mohd1 kamshafiq@gmail.com
Publikováno v:
Neutrosophic Sets & Systems. 2024, Vol. 73, p282-301. 20p.
Autor:
Shaw, Abinash Kumar, Chakraborty, Arnab, Kamran, Mohd, Ghara, Raghunath, Choudhuri, Samir, Ali, Sk. Saiyad, Pal, Srijita, Ghosh, Abhik, Kumar, Jais, Dutta, Prasun, Sarkar, Anjan Kumar
The redshifted 21-cm radiation from the atomic hydrogen (HI) provides an excellent direct probe to study the evolution of HI in IGM and thus reveal the nature of the first luminous objects, their evolution and role during Cosmic Dawn (CD) and Epoch o
Externí odkaz:
http://arxiv.org/abs/2211.05512
Autor:
Kamran, Mohd, Ghara, Raghunath, Majumdar, Suman, Mellema, Garrelt, Bharadwaj, Somnath, Pritchard, Jonathan R., Mondal, Rajesh, Iliev, Ilian T.
The radiations from the first luminous sources drive the fluctuations in the 21-cm signal at Cosmic Dawn (CD) via two dominant astrophysical processes i.e. the Ly$\alpha$ coupling and X-ray heating, making this signal highly non-Gaussian. The impact
Externí odkaz:
http://arxiv.org/abs/2207.09128
Autor:
Pathak, Aadarsh, Bag, Satadru, Dasgupta, Saswata, Majumdar, Suman, Mondal, Rajesh, Kamran, Mohd, Sarkar, Prakash
The evolution of topology and morphology of ionized or neutral hydrogen during different stages of the Epoch of Reionization (EoR) have the potential to provide us a great amount of information about the properties of the ionizing sources during this
Externí odkaz:
http://arxiv.org/abs/2202.03701
Autor:
Kamran, Mohd, Majumdar, Suman, Ghara, Raghunath, Mellema, Garrelt, Bharadwaj, Somnath, Pritchard, Jonathan R., Mondal, Rajesh, Iliev, Ilian T.
With the advent of the first luminous sources at Cosmic Dawn (CD), the redshifted 21-cm signal, from the neutral hydrogen in the Inter-Galactic Medium (IGM), is predicted to undergo a transition from absorption to emission against the CMB. Using simu
Externí odkaz:
http://arxiv.org/abs/2108.08201
Radio interferometric experiments aim to constrain the reionization model parameters by measuring the 21-cm signal statistics, primarily the power spectrum. However the Epoch of Reionization (EoR) 21-cm signal is highly non-Gaussian, and this non-Gau
Externí odkaz:
http://arxiv.org/abs/2108.07279
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 508, Issue 3, December 2021, Pages 3848-3859
We study the spherically averaged bispectrum of the 21-cm signal from the Epoch of Reionization (EoR). This metric provides a quantitative measurement of the level of non-Gaussianity of the signal which is expected to be high. We focus on the impact
Externí odkaz:
http://arxiv.org/abs/2107.02668