Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/36485
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dc.contributor.authorHeard, V.-
dc.contributor.authorWarwick, Robert Seymour-
dc.date.accessioned2016-02-01T10:55:27Z-
dc.date.available2016-02-01T10:55:27Z-
dc.date.issued2013-07-09-
dc.identifier.citationMonthly Notices Of The Royal Astronomical Society, 2013, 434 (2), pp. 1339-1354 (16)en
dc.identifier.issn0035-8711-
dc.identifier.urihttp://mnras.oxfordjournals.org/content/434/2/1339en
dc.identifier.urihttp://hdl.handle.net/2381/36485-
dc.description.abstractWe have extended our earlier study of the X-ray emission emanating from the central 100 pc × 100 pc region of our Galaxy to an investigation of several features prominent in the soft X-ray (2–4.5 keV) band. We focus on three specific structures: a putative bipolar outflow from the vicinity of Sgr A*; a high surface brightness region located roughly 12 arcmin (25 pc) to the north-east of Sgr A* and a lower surface brightness extended loop feature seen to the south of Sgr A*. We show, unequivocally, that all three structures are thermal in nature and have similar temperatures (kT ≈ 1 keV). The inferred X-ray luminosities lie in the range (2–10) × 10[Superscript: 34] erg s[Superscript: −1]. In the case of the bipolar feature we suggest that the hot plasma is produced by the shock heating of the winds from massive stars within the Central Cluster, possibly collimated by the Circumnuclear Disc. Alternatively the outflow may be driven by outbursts on Sgr A*, which follow tidal disruption events occurring at a rate of roughly one every 4000 yr. The north-east enhancement is centred on a candidate pulsar wind nebula which has a relatively hard non-thermal X-ray spectrum. We suggest that the coincident soft-thermal emission traces the core of a new thermal-composite supernova remnant, designated as SNR G0.13−0.12. There is no clear evidence for an associated radio shell but such a feature may be masked by the bright emission of the nearby Radio Arc and other filamentary structures. SNR G0.13−0.12 is very likely interacting with the nearby molecular cloud, G0.11−0.11, and linked to the Fermi source, 2FGL J1746.4−2851c. Finally we explore a previous suggestion that the elliptically shaped X-ray loop to the south of Sgr A*, of maximum extent ∼45 pc, represents the shell of a superbubble located in the GC region. Although plausible, the interpretation of this feature in terms a coherent physical structure awaits confirmation.en
dc.language.isoenen
dc.publisherOxford University Press (OUP)en
dc.rightsThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Author. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.en
dc.subjectScience & Technologyen
dc.subjectPhysical Sciencesen
dc.subjectAstronomy & Astrophysicsen
dc.subjectASTRONOMY & ASTROPHYSICSen
dc.subjectGalaxy: centreen
dc.subjectX-rays: ISMen
dc.subjectGAMMA-RAY EMISSIONen
dc.subjectSUPERMASSIVE BLACK-HOLEen
dc.subjectMORPHOLOGY SUPERNOVA-REMNANTSen
dc.subjectDENSE MOLECULAR CLOUDSen
dc.subjectLARGE-AREA TELESCOPEen
dc.subjectDIFFUSE-X-RAYen
dc.subjectSAGITTARIUS-A-ASTERISKen
dc.subjectPHOTON IMAGING CAMERAen
dc.subjectLINE OBSERVATIONSen
dc.subjectARCHES CLUSTERen
dc.titleXMM-Newton observations of the Galactic Centre Region - II. The soft-thermal emissionen
dc.typeJournal Articleen
dc.identifier.doi10.1093/mnras/stt1102-
dc.identifier.eissn1365-2966-
dc.description.statusPeer-revieweden
dc.description.versionPublisher Versionen
dc.type.subtypeArticle;Journal-
pubs.organisational-group/Organisationen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERINGen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomyen
dc.dateaccepted2013-06-15-
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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