Mt. Suhora Survey - Searching for Pulsating M Dwarfs. I

• Autorzy: Baran, A. S. , Winiarski, M. , Krzesiński, J. , Fox-Machado, L. , Kawaler, S. D. , Dróżdż, M. , Faltenbacher, A. , Thompson, M. A. , Reed, M. D.
• Języki publikacji: EN

Abstrakty

EN

We present the first results of our M dwarf survey in search for stellar pulsation in low mass main sequence stars. Theoretical calculations predict that ε mechanism might drive a fundamental radial mode in these stars and therefore pulsations could be observed photometrically. Although M dwarfs are known for their flare and spot activity they have not yet been the subject of dedicated time-series surveys for pulsation. In this work we include the light curves and amplitude spectra of 46 M dwarfs, which have been observed during the first two years of our survey. We did not detect any pulsations yet. As a by-product of our search, we describe the light curves of some flare M dwarfs. The survey will last for two more years and during that period more than a hundred of M0-M4 type main sequence stars will be observed.

Słowa kluczowe

EN

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

• Czasopismo: Acta Astronomica
• Rocznik: 2011
• Tom: Vol. 61, No. 1
• Strony: 37--58
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr.

Twórcy

autor

Baran, A. S.

• Mt. Suhora Observatory of the Pedagogical University, ul. Podchorążych 2, 30-084 Cracow, Poland ,
• Iowa State University, 12 Physics Hall, Ames, IA 50011, USA

autor

Winiarski, M.

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

autor

Krzesiński, J.

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

autor

Fox-Machado, L.

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

autor

Kawaler, S. D.

• Iowa State University, 12 Physics Hall, Ames, IA 50011, USA,

autor

Dróżdż, M.

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

autor

Faltenbacher, A.

• University of Western Cape, Physics Department, Cape Town 7535, South Africa ,

autor

Thompson, M. A.

• Missouri State University, Department of Physics, Astronomy, and Materials Science, 901 S. National Av., Springfield, MO 65897, USA ,

autor

Reed, M. D.

• Missouri State University, Department of Physics, Astronomy, and Materials Science, 901 S. National Av., Springfield, MO 65897, USA ,

Bibliografia

• Baraffe, I., and Chabrier, G. 1996, ApJ, 461, L51.
• Berger, D.H., et al. 2006, ApJ, 644, 475.
• Chabrier, G., and Baraffe, I. 1997, A&A, 327, 1039.
• Chabrier, G., and Baraffe, I. 2000, Ann. Rev. Astron. Astrophys., 38, 337.
• Cody, A.N., and Hillenbrand, L. 2010, ApJS, 191, 389.
• Delfosse, X., et al. 2004, in: “Spectroscopically and Spatially Resolving the Components of the Close Binary Stars” ASP Conference Series, vol. 318, 166.
• Gliese, W., and Jahreiss, H. 1979, A&AS, 38, 423.
• Henry, J.W., et al. 2006, AJ, 132, 2360.
• Hertzsprung, E. 1924, Bulletin of the Astronomical Institutes of the Netherlands, 2, 87.
• Hillenbrand, L.A., and White, R.J. 2004, ApJ, 604, 741.
• Kawaler, S.D. 1988, ApJ, 334, 220.
• López-Morales, M., and Ribas, I. 2005, ApJ, 631, 1120.
• Palla, F., and Baraffe, I. 2005, A&A, 432, L57.
• Stetson, P.B. 1987, PASP, 99, 191.
• Unno, W., Osaki, Y., Ando, H., Saio, H., and Shibahashi, H. 1989, “Nonradial Oscillations of Stars”, (2nd ed.), Tokyo: U. Tokyo Press.