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The contribution of the IGM and minihaloes to the 21-cm signal of reionization
Yue, Bin1,2,4; Ciardi, Benedetta2; Scannapieco, Evan3; Chen, Xuelei1
2009-10-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号398期号:4页码:2122-2133
摘要We study the statistical properties of the cosmological 21-cm signal from both the intergalactic medium (IGM) and minihaloes, using a reionization simulation that includes a self-consistent treatment of minihalo photoevaporation. We consider two models for minihalo formation and three typical thermal states of the IGM - heating purely by ionization, heating from both ionizing and Ly alpha photons and a maximal 'strong heating' model. We find that the signal from the IGM is almost always dominant over that from minihaloes. In our calculation, the differential brightness temperature, delta T-b, of minihaloes is never larger than 2 mK. Although there are indeed some differences in the signals from the minihaloes and from the IGM, even with the planned generation of radio telescopes it will be unfeasible to detect them. However, minihaloes significantly affect the ionization state of the IGM and the corresponding 21-cm flux.
关键词Galaxies: Haloes Galaxies: High-redshift Intergalactic Medium Cosmology: Theory Diffuse Radiation Large-scale Structure Of Universe
DOI10.1111/j.1365-2966.2009.15261.x
收录类别SCI
语种英语
WOS记录号WOS:000269906400044
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8359
专题星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Max Planck Inst Astrophys, D-85741 Garching, Germany
3.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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Yue, Bin,Ciardi, Benedetta,Scannapieco, Evan,et al. The contribution of the IGM and minihaloes to the 21-cm signal of reionization[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,398(4):2122-2133.
APA Yue, Bin,Ciardi, Benedetta,Scannapieco, Evan,&Chen, Xuelei.(2009).The contribution of the IGM and minihaloes to the 21-cm signal of reionization.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,398(4),2122-2133.
MLA Yue, Bin,et al."The contribution of the IGM and minihaloes to the 21-cm signal of reionization".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 398.4(2009):2122-2133.
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