Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.217..701j&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 217, Dec. 1, 1985, p. 701-715.
Astronomy and Astrophysics
Astronomy
32
Astronomical Photometry, Astronomical Spectroscopy, B Stars, Helium, Stellar Oscillations, Electrophotometry, Light Curve, Power Spectra, Radial Velocity, Stellar Mass Ejection
Scientific paper
Photometric and spectroscopic observations of the hot, extreme helium star BD -9° 4395 are presented. These data confirm that it is variable in both light output and in radial velocity, but no colour variations are discernible. Although the number of photometric observations and their distribution in time are not sufficient for a conclusive frequency analysis, the results of such an investigation indicate that the light curve is multiply periodic. It is proposed that the variability of BD-9°4395 be attributed to non-radial g-mode oscillations of the star. Spectroscopic evidence for non-uniform mass loss indicates a similarity between BD-9°4395 and the R Coronae Borealis stars.
Hill Philip W.
Jeffery Simon C.
Kilkenny Dave
Malaney Robert A.
Morrison Kent
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