Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/2601
Title: The hot R Coronae Borealis star DY Centauri: Nebular and photospheric lines
Authors: Kameswara Rao, N
Giridhar, S
Lambert, D. L
Keywords: Absorption spectra
Chromosphere
Emission spectra
Forbidden transitions
Line spectra
Nebulae
R coronae borealis stars
Stellar winds
Carbon
Electron density (concentration)
Electron energy
Helium
Neon
Nitrogen
Oxygen
Sulfur
Issue Date: Dec-1993
Publisher: The European Southern Observatory
Citation: Astronomy and Astrophysics, Vol. 280, No. 1, pp. 201 - 207
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.
URI: http://hdl.handle.net/2248/2601
ISSN: 0004-6361
Appears in Collections:IIAP Publications

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