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

Abstract

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.

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

References in corpus (7)

• The Sloan Digital Sky Survey: Technical Summary
• STELIB: a library of stellar spectra at R~2000
• ROTSE All Sky Surveys for Variable Stars I: Test Fields
• The Optical Gravitational Lensing Experiment. OGLE #7: Binary Microlens or a New Unusual Variable?
• The field high-amplitude SX Phe variable BL Cam: results from a multisite photometric campaign. II. Evidence of a binary - possibly triple - system
• Multi-site observations of Delta Scuti stars 7 Aql and 8 Aql (a new Delta Scuti variable): The twelfth STEPHI campaign in 2003
• Two-site CCD observations and spectroscopy of HD 207331: a new $\delta$ Scuti variable in Cygnus