The Spectrum of the Cool R Coronae Borealis Variable S Apodis in a Deep Decline

Details The Spectrum of the Cool R Coronae Borealis Variable S Apodis in a Deep Decline The Spectrum of the Cool R Coronae Borealis Variable S Apodis in a Deep Decline

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasp..109..270g&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.109, p.270

Other

9

Stars: Variables: Other, Stars: Evolution

Scientific paper

A high resolution spectrum (5575 - 8875\AA) of the cool R Coronae Borealis variable S Apodis in its 1993 deep decline is discussed. Narrow or chromospheric emission lines of Na I, K I, Ca II, and Ba II and broad emission lines of He I 7065\AA and Na I D are seen, as expected from published reports of warmer RCBs in decline. The surprise of the S Aps spectrum is the considerable blue shift of the broad emissions component to the Na D lines. The blue shift may result from lines formed in a bipolar flow which is obscured asymmetrically by soot clouds along the line of sight. (SECTION: Stars)

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