Infrared background signatures of the first black holes
文献类型：期刊论文
| 作者 | Yue, Bin1; Ferrara, Andrea2; Salvaterra, Ruben3; Xu, Yidong1 ; Chen, Xuelei1,4
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2013-08-01 |
| 卷号 | 433期号:2页码:1556-1566 |
| 关键词 | diffuse radiation early Universe infrared: diffuse background X-rays: diffuse background |
| 英文摘要 | Angular fluctuations of the near-infrared background (NIRB) intensity are observed up to scales less than or similar to 1 degrees. Their interpretation is challenging as even after removing the contribution from detected sources, the residual signal is > 10 times higher than expected from distant galaxies below the detection limit and first stars. We propose here a novel interpretation in which early, intermediate-mass, accreting direct collapse black holes (DCBHs), which are too faint to be detected individually in current surveys, could explain the observed fluctuations. We find that a population of highly obscured (N-H greater than or similar to 10(25) cm(-2)) DCBHs formed in metal-free haloes with virial temperature 10(4) K at z greater than or similar to 12 can explain the observed level approximate to 10(-3) (nW m(-2) sr(-1))(2) of the 3.6 and 4.5 mu m fluctuations on scales > 100 arcsec. The signal on smaller scales is instead produced by undetected galaxies at low and intermediate redshifts. Albeit Compton-thick, at scales theta > 100 arcsec DCBHs produce a cosmic X-ray background (0.5-2 keV)-NIRB (4.5 mu m) cross-correlation signal of similar or equal to 10(-11) erg s(-1) cm(-2) nW m(-2) sr(-1) slightly dependent on the specific value of the absorbing gas column (N-H approximate to 10(25) cm(-2)) adopted and in agreement with the recent measurements by Cappelluti et al. At smaller scales the cross-correlation is dominated by the emission of high-mass X-ray binaries hosted by the same low-z, undetected galaxies accounting for small-scale NIRB fluctuations. These results outline the great potential of the NIRB as a tool to investigate the nature of the first galaxies and black holes. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000321462300052 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6016]  |
| 专题 | 国家天文台_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.Scuola Normale Super Pisa, I-56126 Pisa, Italy 3.IASF Milano, INAF, I-20133 Milan, Italy 4.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yue, Bin,Ferrara, Andrea,Salvaterra, Ruben,et al. Infrared background signatures of the first black holes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,433(2):1556-1566. |
| APA | Yue, Bin,Ferrara, Andrea,Salvaterra, Ruben,Xu, Yidong,&Chen, Xuelei.(2013).Infrared background signatures of the first black holes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,433(2),1556-1566. |
| MLA | Yue, Bin,et al."Infrared background signatures of the first black holes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 433.2(2013):1556-1566. |
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来源：国家天文台
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