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Relativistic baryonic jets from an ultraluminous supersoft X-ray source
Liu, Ji-Feng1,2; Bai, Yu1; Wang, Song1; Justham, Stephen1,2; Lu, You-Jun1,2; Gu, Wei-Min3; Liu, Qing-Zhong4; Di Stefano, Rosanne5; Guo, Jin-Cheng1; Cabrera-Lavers, Antonio6,7; Alvarez, Pedro6,7; Cao, Yi8; Kulkarni, Shri8
2015-12-03
Source PublicationNATURE
Volume528Issue:7580Pages:108-+
AbstractThe formation of relativistic jets by an accreting compact object is one of the fundamental mysteries of astrophysics. Although the theory is poorly understood, observations of relativistic jets from systems known as microquasars (compact binary stars)(1,2) have led to a well established phenomenology(3,4). Relativistic jets are not expected to be produced by sources with soft or supersoft X-ray spectra, although two such systems are known to produce relatively low-velocity bipolar outflows(5,6). Here we report the optical spectra of an ultraluminous supersoft X-ray source (ULS7,8) in the nearby galaxy M81 (M81 ULS-1; refs 9, 10). Unexpectedly, the spectra show blueshifted, broad H alpha emission lines, characteristic of baryonic jets with relativistic speeds. These time-variable emission lines have projected velocities of about 17 per cent of the speed of light, and seem to be similar to those from the prototype microquasar SS 433 (refs 11, 12). Such relativistic jets are not expected to be launched from white dwarfs(13), and an origin from a black hole or a neutron star is hard to reconcile with the persistence of M81 ULS-1's soft X-rays(10). Thus the unexpected presence of relativistic jets in a ULS challenges canonical theories of jet formation(3,4), but might be explained by a long-speculated, supercritically accreting black hole with optically thick outflows(14-20).
WOS HeadingsScience & Technology
DOI10.1038/nature15751
WOS KeywordMASS BLACK-HOLE ; ACCRETION DISKS ; EXTERNAL GALAXIES ; M81 ; DISCOVERY ; BINARIES ; SS-433 ; NOVAE
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000365606000057
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16074
Collection太阳高能及相关物理过程研究团组
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China
3.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian Province, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
5.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
6.Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Tenerife, Spain
7.Univ La Laguna, Dept Astrofis, E-38205 San Cristobal la Laguna, Tenerife, Spain
8.CALTECH, Dept Astron, Pasadena, CA 91125 USA
Recommended Citation
GB/T 7714
Liu, Ji-Feng,Bai, Yu,Wang, Song,et al. Relativistic baryonic jets from an ultraluminous supersoft X-ray source[J]. NATURE,2015,528(7580):108-+.
APA Liu, Ji-Feng.,Bai, Yu.,Wang, Song.,Justham, Stephen.,Lu, You-Jun.,...&Kulkarni, Shri.(2015).Relativistic baryonic jets from an ultraluminous supersoft X-ray source.NATURE,528(7580),108-+.
MLA Liu, Ji-Feng,et al."Relativistic baryonic jets from an ultraluminous supersoft X-ray source".NATURE 528.7580(2015):108-+.
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