Investigating the Effect of PBH, Dark Matter — Baryon and Dark Matter — Dark Energy Interaction on EDGES in 21cm Signal. (arXiv:2101.05228v2 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Halder_A/0/1/0/all/0/1">Ashadul Halder</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pandey_M/0/1/0/all/0/1">Madhurima Pandey</a>
21cm radio signal has emerged as an important probe in investigating the Dark
Age of the Universe (recombination to reionization). In the current analysis,
we explore the combined effect of baryon – Dark Matter interaction, primordial
black holes (PBH) on the 21cm brightness temperature. The variation of
brightness temperature shows remarkable dependence on Dark Matter mass
($m_{chi}$) and the baryon – Dark Matter cross-section ($sigma_0$). We
address a bound in the $m_{chi}$ – $sigma_0$ space in presence of PBH in the
framework of three different Interacting Dark Energy (IDE) models of the
Universe. The limits are estimated based on the observed excess
($-500^{+200}_{-500}$ mK) of 21cm brightness temperature by EDGES experiment.
Eventually, a bound on PBH mass is also estimated for different values of Dark
Matter mass and the IDE model coupling parameters and the compatibility of the
IDE model constraints in the estimated bounds are also addressed.
21cm radio signal has emerged as an important probe in investigating the Dark
Age of the Universe (recombination to reionization). In the current analysis,
we explore the combined effect of baryon – Dark Matter interaction, primordial
black holes (PBH) on the 21cm brightness temperature. The variation of
brightness temperature shows remarkable dependence on Dark Matter mass
($m_{chi}$) and the baryon – Dark Matter cross-section ($sigma_0$). We
address a bound in the $m_{chi}$ – $sigma_0$ space in presence of PBH in the
framework of three different Interacting Dark Energy (IDE) models of the
Universe. The limits are estimated based on the observed excess
($-500^{+200}_{-500}$ mK) of 21cm brightness temperature by EDGES experiment.
Eventually, a bound on PBH mass is also estimated for different values of Dark
Matter mass and the IDE model coupling parameters and the compatibility of the
IDE model constraints in the estimated bounds are also addressed.
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