Mt. Suhora M dwarf survey - Detection of eight short-period variable stars

Details Mt. Suhora M dwarf survey - Detection of eight short-period variable stars Mt. Suhora M dwarf survey - Detection of eight short-period variable stars

2011-06-22

arxiv.org/abs/1106.4565v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted for publication in New Astronomy, 12 pages, 1 table, 9 figures

Scientific paper

10.1016/j.newast.2011.06.008

The Mt. Suhora M\,dwarf survey searching for pulsations in low mass main sequence stars has acquired CCD photometry of 46 M\,dwarf stars during the first year of the project (Baran et al 2011). As a by-product of this search hundreds field stars have been checked for variability. This paper presents our initial result of a search for periodic variables in field stars observed in the course of the survey. On the basis of the periodicity and the shape of the light curves, eight new variables has been detected, among which five are $\delta$ Scuti stars and three likely RR Lyrae stars. Although variation in one of the stars has been previously detected, it was classified incorrectly. To support our classification, in August 2010, we performed spectroscopic observations to derive spectral types and luminosity classes for all eight variable stars.

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