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Article: A past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B clouds

TitleA past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B clouds
Authors
Yu, YWCheng, KSChernyshov, DODogiel, VA
KeywordsBlack hole physics
Galaxy: centre
Radiation mechanisms: non-thermal
X-rays: individual: Sagittarius B
Issue Date2011
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/
Citation
Monthly Notices of the Royal Astronomical Society, 2011, v. 411 n. 3, p. 2002-2008 How to Cite?
DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17826.x
AbstractThe fluorescent X-ray emission from neutral iron in the molecular clouds [Sagittarius (Sgr) B] indicates that the clouds are being irradiated by an external X-ray source. The source is probably associated with the Galactic central black hole (Sgr A*), which triggered a bright outburst 100 yr ago. We suggest that such an outburst could be due to a partial capture of a star by Sgr A*, during which a jet was generated. Using constraints from the observed flux and the time variability (∼10 yr) of the Sgr B fluorescent emission, we find that the shock produced by the interaction of the jet with the dense interstellar medium represents a plausible candidate for the X-ray source emission. © 2010 The Authors Monthly Notices of the Royal Astronomical Society © 2010 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/133542
ISSN
0035-8711
2021 Impact Factor: 5.235
2020 SCImago Journal Rankings: 2.058
ISI Accession Number ID
WOS:000287486400049
Funding AgencyGrant Number
Government of the Hong Kong SARHKU 7011/10P
National Natural Science Foundation of China10773004
RFBR08-02-00170-a
NSC-RFBRRP09N04
09-02-92000-HHC-a
Funding Information:

We thank Dr Tong Liu for useful discussions, Dr T. Harko for a critical reading of this manuscript and the anonymous referee for valuable suggestions that helped us to improve this paper. This work is supported by the GRF Grants of the Government of the Hong Kong SAR under HKU 7011/10P. Y-WY is also partly supported by the National Natural Science Foundation of China (grant 10773004). DOC and VAD are supported by the RFBR grant 08-02-00170-a, the NSC-RFBR Joint Research Project RP09N04 and 09-02-92000-HHC-a.

References
References in Scopus

 

DC FieldValueLanguage
dc.contributor.authorYu, YWen_HK
dc.contributor.authorCheng, KSen_HK
dc.contributor.authorChernyshov, DOen_HK
dc.contributor.authorDogiel, VAen_HK
dc.date.accessioned2011-05-19T02:25:29Z-
dc.date.available2011-05-19T02:25:29Z-
dc.date.issued2011en_HK
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2011, v. 411 n. 3, p. 2002-2008en_HK
dc.identifier.issn0035-8711en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133542-
dc.description.abstractThe fluorescent X-ray emission from neutral iron in the molecular clouds [Sagittarius (Sgr) B] indicates that the clouds are being irradiated by an external X-ray source. The source is probably associated with the Galactic central black hole (Sgr A*), which triggered a bright outburst 100 yr ago. We suggest that such an outburst could be due to a partial capture of a star by Sgr A*, during which a jet was generated. Using constraints from the observed flux and the time variability (∼10 yr) of the Sgr B fluorescent emission, we find that the shock produced by the interaction of the jet with the dense interstellar medium represents a plausible candidate for the X-ray source emission. © 2010 The Authors Monthly Notices of the Royal Astronomical Society © 2010 RAS.en_HK
dc.languageeng-
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/en_HK
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen_HK
dc.rightsThis is the peer reviewed version of the following article: Monthly Notices of the Royal Astronomical Society, 2011, v. 411 n. 3, p. 2002-2008, which has been published in final form at http://dx.doi.org/10.1111/j.1365-2966.2010.17826.x. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectBlack hole physicsen_HK
dc.subjectGalaxy: centreen_HK
dc.subjectRadiation mechanisms: non-thermalen_HK
dc.subjectX-rays: individual: Sagittarius Ben_HK
dc.titleA past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B cloudsen_HK
dc.typeArticleen_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1111/j.1365-2966.2010.17826.xen_HK
dc.identifier.scopuseid_2-s2.0-79951689829en_HK
dc.identifier.hkuros184973-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79951689829&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume411en_HK
dc.identifier.issue3en_HK
dc.identifier.spage2002en_HK
dc.identifier.epage2008en_HK
dc.identifier.isiWOS:000287486400049-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridYu, YW=10939495100en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.scopusauthoridChernyshov, DO=14059433800en_HK
dc.identifier.scopusauthoridDogiel, VA=6603566238en_HK
dc.identifier.issnl0035-8711-

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