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Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/2672
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dc.contributor.authorLambert, D. L-
dc.contributor.authorKameswara Rao, N-
dc.date.accessioned2008-07-14T08:59:56Z-
dc.date.available2008-07-14T08:59:56Z-
dc.date.issued1994-03-
dc.identifier.citationJournal of Astrophysics and Astronomy, Vol. 15, No. 1, pp. 47 - 67en
dc.identifier.issn0250-6335-
dc.identifier.urihttp://hdl.handle.net/2248/2672-
dc.description.abstractThis review presents a selection of recent highlights of observations of R Coronae Borealis (RCB) variables. Emphasis is placed on an abundance analysis of a complete sample (18 stars) of the warm galactic RCBs. It is shown that 14 of the 18 have very similar compositions: the iron mass fraction ranges about a factor of 3 around the solar value (assuming C/He=3%) but abundance ratios X/Fe for elements from Na to Ba show little variation. By contrast, the other 4 stars are deficient in iron but not in Na, Si, S and some other elements. With for example, (Si/Fe) approximately equal to 2, the quartet is indeed 'peculiar'. One of the quartet, V854 Cen shows depletions of elements (other than CNO) similar to the depletions seen in interstellar medium corresponding to average log n (Htot)=1.5. Scenarios for creating RCB from normal single and double stars are summarized.en
dc.format.extent2195472 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherIndian Academy of Sciencesen
dc.relation.urihttp://adsabs.harvard.edu/abs/1994JApA...15...47Len
dc.subjectMetallicityen
dc.subjectR Coronae Borealis Starsen
dc.subjectStellar Envelopesen
dc.subjectStellar Evolutionen
dc.subjectAstronomical Catalogsen
dc.subjectGalactic Rotationen
dc.subjectStellar Luminosityen
dc.subjectStellar Magnitudeen
dc.subjectSurface Temperatureen
dc.subjectWhite Dwarf Starsen
dc.titleThe R Coronae Borealis stars - A few mere factsen
dc.typeArticleen
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