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
Source PublicationASTROPHYSICAL JOURNAL
Volume838Issue:2
AbstractDirect 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.
SubtypeArticle
KeywordDark Ages Reionization First Stars Quasars: Supermassive Black Holes X-rays: Diffuse Background
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationCAS 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
WOS KeywordDARK-MATTER HALOES ; PRIMORDIAL STAR-FORMATION ; X-RAY-EMISSION ; EARLY UNIVERSE ; 1ST GALAXIES ; STELLAR POPULATIONS ; LOW-METALLICITY ; HYDROGEN MOLECULES ; SUPERMASSIVE STAR ; HIGH REDSHIFTS
Indexed BySCI
Language英语
Funding OrganizationCAS 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000398275400012
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8234
Collection星系宇宙学研究部
Affiliation1.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
Recommended Citation
GB/T 7714
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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