The hot R Coronae Borealis star DY Centauri: Nebular and photospheric lines

Kameswara Rao, N; Giridhar, S; Lambert, D. L

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dc.contributor.author	Kameswara Rao, N
dc.contributor.author	Giridhar, S
dc.contributor.author	Lambert, D. L
dc.date.accessioned	2008-07-09T09:03:50Z
dc.date.available	2008-07-09T09:03:50Z
dc.date.issued	1993-12
dc.identifier.citation	Astronomy and Astrophysics, Vol. 280, No. 1, pp. 201 - 207	en
dc.identifier.issn	0004-6361
dc.identifier.uri	http://hdl.handle.net/2248/2601
dc.description.abstract	High resolution spectra in the red region of the hot R CrB star DY Cen show the following characteristics: a strong absorption line spectrum dominated by lines of C II, N II, and Ne I inverse P-Cygni type profiles of some C II and He I lines, and emission lines of (N II), (S II) and (O I). The star also seems to posses an expanding chromosphere or stellar wind region. The forbidden lines indicate the presence of a low excitation nebula with an electron temperature of less than or equal to 10 000 K and an electron density of 450/cu cm. The presence of low excitation nebulae may be a common property of the hotter R CrB stars.	en
dc.format.extent	1081533 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	The European Southern Observatory	en
dc.relation.uri	http://adsabs.harvard.edu/abs/1993A%26A...280..201R	en
dc.subject	Absorption spectra	en
dc.subject	Chromosphere	en
dc.subject	Emission spectra	en
dc.subject	Forbidden transitions	en
dc.subject	Line spectra	en
dc.subject	Nebulae	en
dc.subject	R coronae borealis stars	en
dc.subject	Stellar winds	en
dc.subject	Carbon	en
dc.subject	Electron density (concentration)	en
dc.subject	Electron energy	en
dc.subject	Helium	en
dc.subject	Neon	en
dc.subject	Nitrogen	en
dc.subject	Oxygen	en
dc.subject	Sulfur	en
dc.title	The hot R Coronae Borealis star DY Centauri: Nebular and photospheric lines	en
dc.type	Article	en