Constraint on the early-formed dark matter halos using the free-free emission in the Planck foreground analysis
Constraint on the early-formed dark matter halos using the free-free emission in the Planck foreground analysis
复制标题
普朗克前景分析中自由发射对早期形成暗物质晕的约束
DOI:
10.1103/physrevd.105.063531
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发表时间:
2022
影响因子:
5
通讯作者:
Tashiro Hiroyuki
中科院分区:
文献类型:
--
作者:
Abe Katsuya T.;Minoda Teppei;Tashiro Hiroyuki
We provide a new constraint on the small-scale density fluctuations, evaluating the diffuse background free-free emission from dark matter halos in the dark ages. If there exists a large amplitude of the matter density fluctuations on small scales, the excess enhances the early formation of dark matter halos. When the virial temperature is sufficiently high, the gas in a halo is heated up and ionized by thermal collision. The heated ionized gas emits photons by the free-free process. We would observe the sum of these photons as the diffuse background free-free emission. Assuming the analytical dark matter halo model including the gas density and temperature profile, we calculate the intensity of the diffuse background free-free emission from early-formed dark matter halos in the microwave frequency range. Comparing with the recent foreground analysis on cosmic microwave background, we obtain the constraint on the excess of the density fluctuations on small scales. Our constraint corresponds toforwith assuming the delta-function-type curvature power spectrum. Therefore, our constraint is the most stringent constraint on the perturbations below 1 Mpc scales.
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DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
J. Dent;D. Easson;H. Tashiro
通讯作者:
H. Tashiro
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
A. H. Shahreza;A. A. Jazi;E. Banitalebi;A. Palizban
通讯作者:
A. Palizban
DOI:
10.1086/421241
发表时间:
2004
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
A. Cooray;S. Furlanetto
通讯作者:
S. Furlanetto
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5
作者:
Kayla Redmond;Anthony Trezza;A. Erickcek
通讯作者:
A. Erickcek
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
Wayne Hu;D. Scott;J. Silk
通讯作者:
J. Silk