Mt. Suhora Survey - Searching for Pulsating M Dwarfs in Kepler Public Dataset

• Autorzy: Baran A. S. , Fox-Machado L. , Lykke J. , Nielsen M. , Telting J. H.
• Języki publikacji: EN

Abstrakty

EN

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 ε 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 ε 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.

Słowa kluczowe

EN

stars: oscillations: including pulsations; stars: low-mass; asteroseismology

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2011
• Tom: Vol. 61, No. 4
• Strony: 325--343
• Opis fizyczny: Bibliogr. 10 poz., tab., wykr.

Twórcy

autor

Baran A. S.

• Mt. Suhora Observatory of the Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland

autor

Fox-Machado L.

• Instituto de Astronomia - Universidad Nacional Autónoma de México, Ap. P. 877, Ensenada, BC 22860, Mexico

autor

Lykke J.

• Nordic Optical Telescope, 38700 Santa Cruz de La Palma, Spain

autor

Nielsen M.

• Nordic Optical Telescope, 38700 Santa Cruz de La Palma, Spain

autor

Telting J. H.

• Nordic Optical Telescope, 38700 Santa Cruz de La Palma, Spain

Bibliografia

• Baran, A., et al. 2011, Acta Astron., 61, 37.
• Le Borgne, J.-F., et al. 2003, A&A, 402, 433.
• Borucki, W., et al. 2010, Science, 327, 977.
• Cody, A.N., and Hillenbrand, L. 2010, ApJS, 191, 389.
• Fox Machado, L., et al. 2012, New Astronomy, 17, 65.
• Kirkpatrick, J.D., et al. 1991, ApJS, 77, 417.
• Palla, F., and Baraffe, I. 2005, A&A, 432, L57.
• Rodríguez-López, C., MacDonald, J., and Moya, A. 2012, MNRAS, 419, 44.
• Sánchez-Blázquez, P., et al. 2006, MNRAS, 371, 703.
• Schuster, W.J., and Parrao, L. 2001, Rev. Mex. de Astronomia y Astrofisica, 37, 187.