NAOC Open IR  > 星系宇宙学研究部
Triggering the Formation of Direct Collapse Black Holes by Their Congeners
Yue, Bin1,2; Ferrara, Andrea2,3; Pacucci, Fabio2,4; Omukai, Kazuyuki5
2017-04-01
发表期刊ASTROPHYSICAL JOURNAL
卷号838期号:2
摘要Direct collapse black holes (DCBHs) are excellent candidates for seeds of supermassive black holes observed at z greater than or similar to 6. The formation of a DCBH requires a strong external radiation field to suppress H-2 formation and cooling in a collapsing gas cloud. Such a strong field is not easily achieved by first stars or normal star-forming galaxies. Here we investigate a scenario in which a previously formed DCBH can provide the necessary radiation field for the formation of additional ones. Using a one-zone model and simulated DCBH Spectral Energy Distributions (SEDs) filtered through absorbing gas initially having column density N-H, we derive the critical field intensity, J(LW)(crit), to suppress H-2 formation and cooling. For the SED model with N-H= 1.3 x 10(25) cm(-2), 8.0. x. 10(24) cm(-2), and 5.0. x. 10(24) cm(-2), we obtain J(LW)(crit) approximate to 22, 35, and 54, all much smaller than the critical field intensity for normal starforming galaxies J(LW)(crit) greater than or similar to 1000 X-ray photons from previously formed DCBHs build up a high-z X-ray background (XRB) that may boost the J(LW)(crit). However, we find that in the three SED models, J(LW)(crit) only increases to approximate to 80, 170, and 390, even when rho center dot reaches the maximum value allowed by the present-day XRB level (0.22, 0.034, 0.006M(circle dot) yr(-1) Mpc(-3)), which is still much smaller than the galactic value. Although considering the XRB from first galaxies may further increase J(LW)(crit), we conclude that our investigation supports a scenario in which DCBHs may be more abundant than predicted by models only including galaxies as external radiation sources.
文章类型Article
关键词Dark Ages Reionization First Stars Quasars: Supermassive Black Holes X-rays: Diffuse Background
WOS标题词Science & Technology ; Physical Sciences
资助者CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; NASA-ADAP grant(MA160009) ; NASA-ADAP grant(MA160009) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040) ; CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; NASA-ADAP grant(MA160009) ; NASA-ADAP grant(MA160009) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040)
DOI10.3847/1538-4357/aa6627
关键词[WOS]DARK-MATTER HALOES ; PRIMORDIAL STAR-FORMATION ; X-RAY-EMISSION ; EARLY UNIVERSE ; 1ST GALAXIES ; STELLAR POPULATIONS ; LOW-METALLICITY ; HYDROGEN MOLECULES ; SUPERMASSIVE STAR ; HIGH REDSHIFTS
收录类别SCI
语种英语
资助者CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; NASA-ADAP grant(MA160009) ; NASA-ADAP grant(MA160009) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040) ; CAS Pioneer Hundred Talents (Young Talents) Program ; CAS Pioneer Hundred Talents (Young Talents) Program ; NASA-ADAP grant(MA160009) ; NASA-ADAP grant(MA160009) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040) ; Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan(25287040)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000398275400012
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被引频次:4[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/114a11/8234
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.Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy
3.Univ Tokyo, Todai Inst Adv Study, Kavli IPMU WPI, Tokyo, Japan
4.Yale Univ, Dept Phys, POB 208101, New Haven, CT 06520 USA
5.Tohoku Univ, Astron Inst, Sendai, Miyagi 9808578, Japan
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Yue, Bin,Ferrara, Andrea,Pacucci, Fabio,et al. Triggering the Formation of Direct Collapse Black Holes by Their Congeners[J]. ASTROPHYSICAL JOURNAL,2017,838(2).
APA Yue, Bin,Ferrara, Andrea,Pacucci, Fabio,&Omukai, Kazuyuki.(2017).Triggering the Formation of Direct Collapse Black Holes by Their Congeners.ASTROPHYSICAL JOURNAL,838(2).
MLA Yue, Bin,et al."Triggering the Formation of Direct Collapse Black Holes by Their Congeners".ASTROPHYSICAL JOURNAL 838.2(2017).
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