A Class of Eccentric Binaries with Dynamic Tidal Distortions Discovered with Kepler

Дата и время публикации : 2012-03-27T23:53:58Z

Авторы публикации и институты :
Susan E. Thompson
Mark Everett
Fergal Mullally
Thomas Barclay
Steve B. Howell
Martin Still
Jason Rowe
Jessie L. Christiansen
Donald W. Kurtz
Kelly Hambleton
Joseph D. Twicken
Khadeejah A. Ibrahim
Bruce D. Clarke

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 13 pages, submitted to ApJ
Первичная категория: astro-ph.SR

Все категории : astro-ph.SR

Краткий обзор статьи: We have discovered a class of eccentric binary systems within the Kepler data archive that have dynamic tidal distortions and tidally-induced pulsations. Each has a uniquely shaped light curve that is characterized by periodic brightening or variability at time scales of 4-20 days, frequently accompanied by shorter period oscillations. We can explain the dominant features of the entire class with orbitally-varying tidal forces that occur in close, eccentric binary systems. The large variety of light curve shapes arises from viewing systems at different angles. This hypothesis is supported by spectroscopic radial velocity measurements for five systems, each showing evidence of being in an eccentric binary system. Prior to the discovery of these 17 new systems, only four stars, where KOI-54 is the best example, were known to have evidence of these dynamic tides and tidally-induced oscillations. We perform preliminary fits to the light curves and radial velocity data, present the overall properties of this class and discuss the work required to accurately model these systems.

Category: Physics