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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1403
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dc.contributor.authorKassim, N.E.-
dc.contributor.authorPerley, R.A.-
dc.contributor.authorDwarakanath, K.S.-
dc.contributor.authorErickson, W.C.-
dc.date.accessioned2006-07-07T06:07:18Z-
dc.date.available2006-07-07T06:07:18Z-
dc.date.issued1995-12-
dc.identifier.citationAstrophysical Journal Letters, 1995, Vol.455, pL59-L62en
dc.identifier.issn0004-637X-
dc.identifier.issn1538-4357 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/1403-
dc.description.abstractSubarcminute resolution images of Cas A at 74 and 333 MHz are presented. Comparison with each other and with higher frequency observations indicates that the spectral index of its nonthermal emission flattens below 333 MHz and that the effect is confined toward the central 1' of the source and is maximum at its center. The source of the flattening is unknown, although we show that the data are consistent with absorption by ionized gas inside the radio shell. Such a component may be related to unshocked ejecta still freely expanding within the boundaries of the reverse shock as delineated by X-ray observations.en
dc.format.extent2356937 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?1995ApJ...455L..59Ken
dc.rights(1995) by the American Astronomical Society. Scanned images provided by the NASA ADS Data System.en
dc.subjectRADIO CONTINUUM: ISMen
dc.subjectISM: SUPERNOVA REMNANTSen
dc.subjectISM: INDIVIDUAL NAME: CASSIOPEIA Aen
dc.subjectSTARS: SUPERNOVAE: GENERALen
dc.titleEvidence for thermal absorption inside Cassiopeia Aen
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

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