High-resolution optical spectroscopy of the R Coronae Borealis star V532 Ophiuchi at maximum light

Abstract

High-resolution optical spectra of the R Coronae Borealis (RCB) star V532 Oph at light maximum are discussed. The absolute visual magnitude M_V of the star is found to be -4.9 \pm 0.5. The elemental abundances suggest the star belongs to the majority class of RCB stars but is among the most O-poor of this class with mild enhancements of heavy elements Y, Zr, Ba and La. The C_2 Swan bands are weak in V532 Oph relative to R CrB. Other aspects of the high-resolution spectrum confirm that V532 Oph is representative of majority RCBs, i.e., the radial velocity is variable, circumstellar material is present and the photosphere feeds a high-velocity stellar wind.

12 pages, 10 figures

References in corpus (4)

• A search for diffuse bands in the circumstellar envelopes of post-AGB stars
• R Coronae Borealis stars in the Galactic Bulge discovered by EROS-2
• Discovery of Bright Galactic R Coronae Borealis and DY Persei Variables: Rare Gems Mined from ACVS
• R Coronae Borealis at the 2003 Light Minimum

Cited by in corpus (2)

• Abundance analyses of the new R Coronae Borealis stars: ASAS-RCB-8 and ASAS-RCB-10
• Mid-Infrared Variations of R Coronae Borealis Stars