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ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES
Xu, Ya-Di1; Cao, Xinwu2,3
2016-08-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume827Issue:1
AbstractThe atomic features in the X-ray spectra of. ultraluminous X-ray sources (ULXs) may be associated with the outflow, which may provide a way to explore the physics of the ULXs. We construct a conical outflow model. and calculate the thermal X-ray Fe emission lines from the outflows. Our results show that thermal line luminosity decreases with increasing outflow velocity and/or opening angle of the outflow for a fixed kinetic power of the outflows. Assuming the kinetic power of the outflows to be comparable with the accretion power in the ULXs, we find that the equivalent width can be several eV for the thermal X-ray Fe emission line from the outflows in the ULXs with stellar-mass black holes. The thermal line luminosity is proportional to 1/M-bh (M-bh is the black hole mass of the ULX). The equivalent width decreases with the black hole mass, which implies that the Fe line emission from the outflows can hardly be detected if the ULXs contain intermediate-mass black holes. Our results suggest that the thermal X-ray Fe line emission should be preferentially be detected in the ULXs with high kinetic power slowly moving outflows from the accretion disks surrounding stellar-mass black holes/neutron stars. The recently observed X-ray atomic features of the outflows in a. ULX may imply that it contains a stellar-mass black hole.
KeywordAccretion, Accretion Disks Black Hole Physics Ism: Jets And Outflows Radiation Mechanisms: Thermal X-rays: Binaries X-rays: Individual (4u 1630)
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/827/1/14
WOS KeywordACTIVE GALACTIC NUCLEI ; BLACK-HOLE ; ACCRETION DISKS ; RADIO JETS ; METALLICITY GRADIENTS ; 4U 1630-47 ; SS 433 ; DIAGNOSTICS ; LUMINOSITY ; GALAXIES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000382009500014
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23632
Collection中国科学院紫金山天文台
Corresponding AuthorXu, Ya-Di
Affiliation1.Shanghai Jiao Tong Univ, Dept Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, SHAO XMU Joint Ctr Astrophys, 80 Nandan Rd, Shanghai 200030, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Xu, Ya-Di,Cao, Xinwu. ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES[J]. ASTROPHYSICAL JOURNAL,2016,827(1).
APA Xu, Ya-Di,&Cao, Xinwu.(2016).ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES.ASTROPHYSICAL JOURNAL,827(1).
MLA Xu, Ya-Di,et al."ON THE THERMAL LINE EMISSION FROM THE OUTFLOWS IN ULTRALUMINOUS X-RAY SOURCES".ASTROPHYSICAL JOURNAL 827.1(2016).
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