The Variability of the R-Coronae Star Ux-Antilae at Maximum Light

Details The Variability of the R-Coronae Star Ux-Antilae at Maximum Light The Variability of the R-Coronae Star Ux-Antilae at Maximum Light

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.271..919l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 271, NO. 4/DEC15, P. 919, 1994

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Scientific paper

Broad-band photometry obtained during 19901993 and radial velocities measured during 1991 are reported for the little-studied R Coronae Borealis (RCB) star uX Antliae. Photometrically, the star exhibits irregular and low-amplitude (0.1#).3 mag) variations on time-scales of 4050 d, typical in this respect to many other RCB stars with Teff 7000 K. (Spectroscopically, UX Ant is similar to other `F-type' RCB stars such as R CrB and RY Sgr.) A short series of velocity measurements did not indicate radial velocity variability ( = 1.9 km s-'). These results are compared to the pulsation properties of other RCB stars. Finally, UX Ant is shown to have a weaker infrared excess than other RCB stars, probably due to the recent low occurrence of declines in this object. Key words: stars: chemically peculiar - stars: individual: UX Ant - stars: oscillations - stars: variables: other.

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