Fluorine in R Coronae Borealis Stars

dc.contributor.author	Pandey, G
dc.contributor.author	Lambert, D. L
dc.contributor.author	Kameswara Rao, N
dc.date.accessioned	2008-02-29T05:48:17Z
dc.date.available	2008-02-29T05:48:17Z
dc.date.issued	2008-02
dc.identifier.citation	The Astrophysical Journal, Vol. 674, pp. 1068 – 1077	en
dc.identifier.uri	http://hdl.handle.net/2248/2093
dc.description.abstract	Neutral fluorine (F i) lines are identified in the optical spectra of several R Coronae Borealis stars (RCBs) at maximum light. These lines provide the first measurement of the fluorine abundance in these stars. Fluorine is enriched in some RCBs by factors of 800–8000 relative to its likely initial abundance. The overabundances of fluorine are evidence for the synthesis of fluorine. These results are discussed in the light of the scenario that RCBs are formed by accretion of an He white dwarf by a C–O white dwarf. Sakurai’s object (V4334 Sgr), a final He-shell flash product, shows no detectable F i lines.	en
dc.format.extent	813930 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	University of Chicago Press	en
dc.relation.uri	http://www.journals.uchicago.edu/doi/abs/10.1086/526492	en
dc.relation.uri	http://arxiv.org/abs/0711.2363	en
dc.subject	stars	en
dc.subject	abundances—stars	en
dc.subject	chemically peculiar—stars	en
dc.subject	evolution	en
dc.title	Fluorine in R Coronae Borealis Stars	en
dc.type	Article	en