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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/851
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dc.contributor.authorDwarakanath, K.S.-
dc.contributor.authorGoss, W.M.-
dc.contributor.authorZhao, J.H.-
dc.contributor.authorLang, Cornelia C.-
dc.date.accessioned2005-12-26T08:35:27Z-
dc.date.available2005-12-26T08:35:27Z-
dc.date.issued2004-
dc.identifier.citationJournal of Astrophysics and Astronomy, 2004, Vol. 25, p129-141.en
dc.identifier.issn0250-6335-
dc.identifier.urihttp://hdl.handle.net/2289/851-
dc.description.abstractWe have imaged a region of ~5 extent surrounding Sgr A* in the HI 21 cm-line absorption using the Very Large Array. A Gaussian decomposition of the optical depth spectra at positions within ~2(~5 pcat 8.5 kpc) of Sgr A* detects a wide linw underlying the many narrow absorption lines. The wide line has a mean peak optical depth of 0.32 ± 0.12 centered at a mean velocity of Vlsr = -4 ± 15 km s-1. The mean full width half maximum is 119 ± 42 km s-1. Such a wide line is absent in the spectra at positions beyond ~2 from Sgr A*. The position-velocity diagrams do not reveal any diffuse feature which could be attributed to a large number of HI clouds along the line of sight to Sgr A*. Consequently, the wide line has no implications either to a global population of shocked HI clouds in the Galaxy or to the energetics of the interstellar medium as was earlier thought.en
dc.format.extent292459 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherIndian Academy of Sciences, Bangalore, India.en
dc.rightsIndian Academy of Sciences, Bangalore, India.en
dc.subjectGalaxyen
dc.subjectNucleus—radiolinesen
dc.subjectISMen
dc.titleOn the origin of the wide HI absorption line towards Sgr A*en
dc.typeArticleen
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