The effects of population III radiation backgrounds on the cosmological 21-cm signal
The effects of population III radiation backgrounds on the cosmological 21-cm signal
复制标题
III族辐射背景对宇宙学21厘米信号的影响
DOI:
10.1093/mnras/staa280
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发表时间:
2020
影响因子:
4.8
通讯作者:
Furlanetto, Steven R
中科院分区:
文献类型:
--
作者:
Mebane, Richard H;Mirocha, Jordan;Furlanetto, Steven R
We investigate the effects of Population III (Pop III) stars and their remnants on the cosmological 21-cm global signal. By combining a semi-analytic model of Pop III star formation with a global 21-cm simulation code, we investigate how X-ray and radio emission from accreting Pop III black holes may affect both the timing and depth of the 21-cm absorption feature that follows the initial onset of star formation during the Cosmic Dawn. We compare our results to the findings of the EDGES experiment, which has reported the first detection of a cosmic 21-cm signal. In general, we find that our fiducial Pop III models, which have peak star formation rate densities of ∼10−4M⊙yr−1Mpc−3betweenz∼ 10 andz∼ 15, are able to match the timing of the EDGES signal quite well, in contrast to models that ignore Pop III stars. To match the unexpectedly large depth of the EDGES signal without recourse to exotic physics, we vary the parameters of emission from accreting black holes (formed as Pop III remnants) including the intrinsic strength of X-ray and radio emission as well as the local column density of neutral gas. We find that models with strong radio emission and relatively weak X-ray emission can self-consistently match the EDGES signal, though this solution requires fine-tuning. We are only able to produce signals with sharp features similar to the EDGES signal if the Pop III IMF is peaked narrowly around.
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DOI:
10.1140/epjc/s10052-019-6542-9
发表时间:
2018-04
期刊:
The European Physical Journal C
影响因子:
--
作者:
Lian-Bao Jia
通讯作者:
Lian-Bao Jia
影响因子:
4.4
作者:
Chianese, M.;Di Bari, P.;Samanta, R.
通讯作者:
Samanta, R.
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
J. Wise;Tom Abel
通讯作者:
Tom Abel
影响因子:
4.8
作者:
P. Sims;J. Pober
通讯作者:
J. Pober
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Atsuko KAWAGUCHI;Yuki WATANABE;Miwako MURAYAMA;Nobu Goto and Toru Ishii;永澤 済;永澤 済;Nobu Goto;永澤 済;永澤 済;Nobu Goto;Nobu Goto;永澤 済;永澤 済;Nobu Goto and Andreas Blummel;山田里奈;永澤 済;山田里奈;Nobu Goto and Toru Ishii;永澤 済;坂本暁彦・髙木幸子;Nobu Goto;長田 俊樹(編);Akihiko Sakamoto;Nobu Goto;永澤 済;Nobu Goto and Toru Ishii;Akihiko Sakamoto and Kevin M. McManus;坂本暁彦;Nobu Goto;坂本暁彦・髙木幸子;Nobu Goto
通讯作者:
Nobu Goto