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The R Coronae Borealis stars - A few mere facts

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dc.contributor.author Lambert, D. L
dc.contributor.author Kameswara Rao, N
dc.date.accessioned 2008-07-14T08:59:56Z
dc.date.available 2008-07-14T08:59:56Z
dc.date.issued 1994-03
dc.identifier.citation Journal of Astrophysics and Astronomy, Vol. 15, No. 1, pp. 47 - 67 en
dc.identifier.issn 0250-6335
dc.identifier.uri http://hdl.handle.net/2248/2672
dc.description.abstract This 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.extent 2195472 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Indian Academy of Sciences en
dc.relation.uri http://adsabs.harvard.edu/abs/1994JApA...15...47L en
dc.subject Metallicity en
dc.subject R Coronae Borealis Stars en
dc.subject Stellar Envelopes en
dc.subject Stellar Evolution en
dc.subject Astronomical Catalogs en
dc.subject Galactic Rotation en
dc.subject Stellar Luminosity en
dc.subject Stellar Magnitude en
dc.subject Surface Temperature en
dc.subject White Dwarf Stars en
dc.title The R Coronae Borealis stars - A few mere facts en
dc.type Article en

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