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Constraints on primordial black holes by distortions of the cosmic microwave background
http://hdl.handle.net/2237/11310
http://hdl.handle.net/2237/113106a030428-2ecf-46c2-bd5c-eb7b17fced6b
名前 / ファイル | ライセンス | アクション |
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PhysRevD_78_023004.pdf (536.2 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2009-03-13 | |||||
タイトル | ||||||
タイトル | Constraints on primordial black holes by distortions of the cosmic microwave background | |||||
言語 | en | |||||
著者 |
Tashiro, Hiroyuki
× Tashiro, Hiroyuki× Sugiyama, Naoshi |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | American Physical Society, All rights reserved. | |||||
抄録 | ||||||
内容記述 | The possible influence of primordial black hole (PBH) evaporations on cosmic microwave backgrounds (CMB) is investigated. The spectrum distortions of CMB from the blackbody spectrum are described by the chemical potential μ and the Compton parameter y. From COBE/FIRAS limits on μ and y, the powerlaw index n of primordial density fluctuations and the mass fraction of PBHs β are constrained by employing the peak theory for the formation process of PBHs. Constraints set here are n<1.304 and n<1.333 in the thresholds of peaks ζ_th = 0.7 and ζ_th = 1.2, respectively, for the PBH mass range between 2.7 × 10^11 g and 1.6 ×10^12 g, and n<1.312 and n<1.343 in the thresholds of peaks ζ_th = 0.7 and ζ_th = 1.2, respectively, for the PBH mass range between 1.6 × 10^12 g and 3.5 ×10^13 g, which correspond to the comoving scales between 3 × 10^{-18} Mpc and 4 ×10^{-17} Mpc. The constraint on the PBH fraction, which is the direct probe of the amplitude of density fluctuations on these scales, stays at almost the same value asβ<10^{-21} in these mass ranges. It is also found that, with these constraints, UV photons injected by PBH evaporations are unlikely to ionize the majority of hydrogen atoms. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society | |||||
言語 | ||||||
言語 | eng | |||||
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資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.78.023004 | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 1550-7998 | |||||
書誌情報 |
en : PHYSICAL REVIEW D 巻 78, 号 2, p. 023004-023004, 発行日 2008-07 |
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application/pdf | ||||||
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値 | publisher | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/11310 | |||||
識別子タイプ | HDL |