arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.2196astro-ph.SR
收藏

HD 181068:一个三重-三重紧致等级三元系中的红巨星

HD 181068: A Red Giant in a Triply-Eclipsing Compact Hierarchical Triple System

A. Derekas, L. L. Kiss, T. Borkovits, D. Huber, H. Lehmann, J. Southworth, T. R. Bedding, D. Balam, M. Hartmann, M. Hrudkova, M. J. Ireland, J. Kovacs, Gy. Mezo… 展开作者

A. Derekas, L. L. Kiss, T. Borkovits, D. Huber, H. Lehmann, J. Southworth, T. R. Bedding, D. Balam, M. Hartmann, M. Hrudkova, M. J. Ireland, J. Kovacs, Gy. Mezo, A. Moor, E. Niemczura, G. E. Sarty, Gy. M. Szabo, R. Szabo, J. H. Telting, A. Tkachenko, K. Uytterhoeven, J. M. Benko, S. T. Bryson, V. Maestro, A. E. Simon, D. Stello, G. Schaefer, C. Aerts, T. A. ten Brummelaar, P. De Cat, H. A. McAlister, C. Maceroni, A. Merand, M. Still, J. Sturmann, L. Sturmann, N. Turner, P. G. Tuthill, J. Christensen-Dalsgaard, R. L. Gilliland, H. Kjeldsen, E. V. Quintana, P. Tenenbaum, J. D. Twicken

摘要:

等级三元系统包括一个近距离的二元系统和一个远距离的二元系统。它们对于检验恒星形成理论和附近伴星存在时的恒星演化理论都很重要。我们获得了HD 181068(星等7.1)的218天开普勒测光,辅以地基光谱学和干涉测量,这表明它是一个有两种类型的相互食的层次三元组。主要的是一颗红巨星,它的轨道是45天,一对红矮星的轨道是0.9天。这颗红巨星显示了潮汐引起的振荡的证据,这些振荡是由近双星的轨道运动驱动的。HD 181068是研究动力学演化和检验三级系统潮汐摩擦理论的理想目标。

英文摘要:

Hierarchical triple systems comprise a close binary and a more distant component. They are important for testing theories of star formation and of stellar evolution in the presence of nearby companions. We obtained 218 days of Kepler photometry of HD 181068 (magnitude of 7.1), supplemented by groundbased spectroscopy and interferometry, which show it to be a hierarchical triple with two types of mutual eclipses. The primary is a red giant that is in a 45-day orbit with a pair of red dwarfs in a close 0.9-day orbit. The red giant shows evidence for tidally-induced oscillations that are driven by the orbital motion of the close pair. HD 181068 is an ideal target for studies of dynamical evolution and testing tidal friction theories in hierarchical triple systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑