Abstract
We present our analysis of Kepler short cadence public data to search for stellar pulsations in M dwarfs. Theoretical calculations predict that these stars may suffer from a fundamental radial mode driven by the nuclear e mechanism. First results published thus far show no significant signal around the expected frequency of 36 c/d down to 1 ppt (parts per thousand). In this paper we include new results obtained from a sample of 86 stars, although a real number of M dwarfs after spectral classification turned out to be small. Unluckily, we have not detected any significant signal typically down to 1-10 ppm (parts per million) in M dwarfs and since the sample of these stars consists of 6 objects only, we cannot make any strong conclusion if the e mechanism drives perturbation in radius to propagate to a detectable amplitude at the surface. As a by-product of our work we provide a spectral classification of 86 Kepler objects, along with their variability and thus far unknown artifacts residing in Kepler photometry.
Original language | English (US) |
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Pages (from-to) | 325-343 |
Number of pages | 19 |
Journal | Acta Astronomica |
Volume | 61 |
Issue number | 4 |
State | Published - 2011 |
Keywords
- Low-mass-Asteroseismology
- Oscillations (includingpulsations) -stars
- Stars
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science