Line-of-Sight Anisotropies in the Cosmic Dawn and Epoch of Reionization 21-cm Power Spectrum
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The line-of-sight direction in the redshifted 21-cm signal
coming from the cosmic dawn and the epoch of reionization is quite
unique in many ways compared to any other cosmological signal. Different
unique effects, such as the evolution history of the signal, non-linear
peculiar velocities of the matter etc. will imprint their signature along
the line-of-sight axis of the observed signal. One of the major goals
of the future SKA-LOW radio interferometer is to observe the cosmic
dawn and the epoch of reionization through this 21-cm signal. It is thus
important to understand how these various effects affect the signal for
its actual detection and proper interpretation. For more than one and half
decades, various groups in India have been actively trying to understand
and quantify the different line-of-sight effects that are present in this signal
through analytical models and simulations. In many ways the importance
of this sub-field under 21-cm cosmology have been identified, highlighted
and pushed forward by the Indian community. In this article, we briefly
describe their contribution and implication of these effects in the context
of the future surveys of the cosmic dawn and the epoch of reionization
that will be conducted by the SKA-LOW.
coming from the cosmic dawn and the epoch of reionization is quite
unique in many ways compared to any other cosmological signal. Different
unique effects, such as the evolution history of the signal, non-linear
peculiar velocities of the matter etc. will imprint their signature along
the line-of-sight axis of the observed signal. One of the major goals
of the future SKA-LOW radio interferometer is to observe the cosmic
dawn and the epoch of reionization through this 21-cm signal. It is thus
important to understand how these various effects affect the signal for
its actual detection and proper interpretation. For more than one and half
decades, various groups in India have been actively trying to understand
and quantify the different line-of-sight effects that are present in this signal
through analytical models and simulations. In many ways the importance
of this sub-field under 21-cm cosmology have been identified, highlighted
and pushed forward by the Indian community. In this article, we briefly
describe their contribution and implication of these effects in the context
of the future surveys of the cosmic dawn and the epoch of reionization
that will be conducted by the SKA-LOW.
Date Issued
2016-11-16
Date Acceptance
2016-07-12
Citation
Journal of Astrophysics and Astronomy, 2016, 37 (4)
ISSN
0250-6335
Publisher
Indian Academy of Sciences
Journal / Book Title
Journal of Astrophysics and Astronomy
Volume
37
Issue
4
Copyright Statement
© 2016 Indian Academy of Sciences.
Subjects
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Methods: statistical
cosmology: theory
dark ages, reionization, first stars
diffuse radiation
21 CM SIGNAL
REDSHIFT-SPACE DISTORTIONS
INTERGALACTIC MEDIUM
PECULIAR VELOCITIES
HI DISTRIBUTION
FLUCTUATIONS
CONSTRAINTS
QUASAR
ARRAY
LOFAR
astro-ph.CO
0201 Astronomical And Space Sciences
Notes
archiveprefix: arXiv keywords: Methods: statistical\mdashcosmology: theory\mdashdark ages, reionization, first stars\mdashdiffuse radiation. eid: 32 adsurl: http://adsabs.harvard.edu/abs/2016JApA...37...32M adsnote: Provided by the SAO/NASA Astrophysics Data System
Article Number
32