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http://hdl.handle.net/2248/2092
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DC Field | Value | Language |
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dc.contributor.author | Kameswara Rao, N | en |
dc.contributor.author | Lambert, D. L | en |
dc.date.accessioned | 2008-02-29T05:40:49Z | - |
dc.date.available | 2008-02-29T05:40:49Z | - |
dc.date.issued | 2008-02 | - |
dc.identifier.citation | MNRAS, Vol. 384, No. 2, pp. 477 – 488 | en |
dc.identifier.uri | http://hdl.handle.net/2248/2092 | - |
dc.description | Restricted Access | en |
dc.description.abstract | Optical high-resolution spectra of the R Coronae Borealis star V CrA at light maximum and during minimum light are discussed. Abundance analysis confirms previous results showing that V CrA has the composition of the small subclass of R Coronae Borealis (RCB) stars know as ‘minority’ RCBs, i.e. the Si/Fe and S/Fe ratios are 100 times their solar values. A notable novel result for RCBs is the detection of the 1–0 Swan system 12C13C bandhead indicating that 13C is abundant: spectrum synthesis shows that 12C/13C is about 3–4. Absorption-line profiles are variable at maximum light with some lines showing evidence of splitting by about 10 km s−1. A spectrum obtained as the star was recovering from a deep minimum shows the presence of cool C2 molecules with a rotational temperature of about 1200 K, a temperature suggestive of gas in which carbon is condensing into soot. The presence of rapidly outflowing gas is shown by blueshifted absorption components of the Na i D and K i 7698 Å resonance lines. | en |
dc.format.extent | 900974 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | en |
dc.publisher | Blackwell Synergy | en |
dc.relation.uri | http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-2966.2007.12643.x | en |
dc.subject | High-resolution spectroscopy | en |
dc.subject | R Coronae Borealis star V Coronae | en |
dc.title | High-resolution spectroscopy of the R Coronae Borealis star V Coronae Australis | en |
dc.type | Article | en |
Appears in Collections: | IIAP Publications |
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Rao.pdf Restricted Access | Restricted Access | 879.86 kB | Adobe PDF | View/Open Request a copy |
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