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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/945
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dc.contributor.authorRadhakrishnan, V.-
dc.contributor.authorSrinivasan, G.-
dc.date.accessioned2005-12-29T04:55:01Z-
dc.date.available2005-12-29T04:55:01Z-
dc.date.issued1980-
dc.identifier.citationJournal of Astrophysics and Astronomy, 1980, Vol. 1, p47-66.en
dc.identifier.issn0250-6335-
dc.identifier.urihttp://hdl.handle.net/2289/945-
dc.description.abstractA 21 cm absorption measurement over a long path length free of the effects of differential galactic rotation indicates the existence of two distinct cloud populations in the plane. One of them consisting of cold, dense clouds has been well studied before. The newly found hot clouds appear to be at least five times more numerous. They have a spin temperature of ~ 300 K, an rms velocity of N 35 km s-1, twice the total mass, and hundred times the kinetic energy of the cold clouds. Over long path lengths, the hot clouds have NH/kpc ~ 2 x 10^21 cm2 kpc-l, and are estimated to have individual column densities ≤10^20 cm2. We propose that they are shocked clouds found only within supernova bubbles and that the cold clouds are found in the regions in between old remnants, immersed in an intercloud medium. We conclude that the solar neighbourhood must be located between old supernova remnants rather than within one.en
dc.format.extent1806999 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.subject21 cm absorptionen
dc.subjectShocked cloudsen
dc.subjectSpin temperatureen
dc.subjectHigh velocitiesen
dc.titleEvidence for a large population of shocked interstellar cloudsen
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

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