CCD photometry of YYOrionis stars

Details CCD photometry of YYOrionis stars CCD photometry of YYOrionis stars

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..129..337h&link_type=abstract

Astronomy and Astrophysics Supplement, v.129, p.337-341

Other

2

Stars: Pre-Main Sequence, Stars: Activity, Stars: Variables: Other

Scientific paper

Photometric UBVRI observations of the YYOrionis stars YYOri, SYOri, CEOri, NSOri and XXOri are presented. The luminosity of all stars is variable on a timescale of a few days. This variation is rather irregular and no periodic variability was observed in the present data sets. The V-I and V-R colors become redder when the stars become fainter, suggesting that inhomogeneous surface temperature distributions are responsible for the observed irregular variability. Two stars located in the vicinity of our program stars and observed in the same frames turned out to be variable. They were identified as V481 Ori and AO Ori. We report a periodic modulation of the V481 Ori light curve with a period of 4.9 days. Tables 3 to 7 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html

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