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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1391
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dc.contributor.authorLubowich, D.A.-
dc.contributor.authorAnantharamaiah, K.R.-
dc.contributor.authorPasachoff, J.M.-
dc.date.accessioned2006-06-28T06:33:03Z-
dc.date.available2006-06-28T06:33:03Z-
dc.date.issued1989-10-15-
dc.identifier.citationAstrophysical Journal, 1989, Vol.345, p770-775en
dc.identifier.issn0004-637X-
dc.identifier.issn1538-4357 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/1391-
dc.description.abstractThe VLA at the 92 cm D I hyperfine transition was used to search for a possible localized concentration of atomic deuterium near the Galactic center over a velocity range of + or - 180 km/s. The search yielded an upper limit for the D column density N(D) = 7.78 x 10 to the 16th T(s)/sq cm where T(s) is the spin temperature of the D I hyperfine lines. For the smaller velocity range of + or - 30 km/s, a more sensitive upper limit of N(D) = 3.12 x 10 to the 16th T(s)/sq cm is obtained. If D is associated with the H I clouds to the Galactic center, an upper limit for the D/H ratio of 0.0043 is obtained for the clouds at V = 20 km/s and 50 km/s. If a significant fraction of the D exists in atomic form in molecular clouds, the upper limits are 1.2 x 10 to the -7th for the V = 20 km/s molecular cloud near the Galactic center and 8.3 x 10 to the -7th for the V = 50 km/s molecular cloud near the Galactic center. These results are consistent with the D observed in the Galactic center and the ISM being primarily cosmological in origin.en
dc.format.extent1106557 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherThe University of Chicago Press for the American Astronomical Societyen
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?1989ApJ...345..770Len
dc.rights(1989) by the American Astronomical Society. Scanned images provided by the NASA ADS Data System.en
dc.subjectdeuteriumen
dc.subjectgalactic nucleien
dc.subjectinterstellar matteren
dc.subjectMilky wave galaxyen
dc.subjectabundance hydrogen cloudsen
dc.subjectline spectraen
dc.subjectmolecular cloudsen
dc.subjectradio sources (astronomy)en
dc.titleA search for localized sources of noncosmological deuterium near the Galactic Centreen
dc.typeArticleen
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