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

作者：Machado, L Fox^*; Baran, A S; Winiarski, M; Krzesinski, J; Drozdz, M

来源：New Astronomy, 2012, 17(2): 65-72.

DOI：10.1016/j.newast.2011.06.008

• Stars: delta Sct
• SX Phe
• Techniques: photometric: spectroscopic
• Stars: oscillations
• Stars: individual: TYC2644 832 1, TYC2594 1673 1, USNO-A2 1200 07693323, TYC3527 2221 1, TYC3517 66 1, USNO-A2 1350 02022405, BD+32 3331, HD188524

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.

• 出版日期2012-2