協辦單位
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協辦單位
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協辦單位
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名稱Title
2018天文年會
國立金門大學
5月18日至20日

論文摘要

White Light Flare Activities of Eclipsing Binary Systems in Kepler Field

[ Either PS14 ]

Li-Ching Huang (Institute of Astronomy, National Central University); Han-Yuan Chang (Institute of Astronomy, National Central University); Chia-Lung Lin (Institute of Astronomy, National Central University); Wing-Huen Ip(Institute of Astronomy, National Central University); Wei-Jie Hou (Institute of Astronomy, National Central University);

From 2009 to 2013, the Kepler space telescope obtained high-precision light curves of about 160,000 stars in a 115-square-degree field near Cygnus and Lyra. Among them, about 2800 eclipsing binary (EB) system were identified. The Kepler data are very useful in the study of large stellar flares that usually last half hour to 3 hours because of the availability of long-term light curves at 30-min cadence. Gao et al. (2016) found superflare events on 234 EBs. The primary stars of 66 of these Kepler EBs are G-type (Teff ~ 5340K-6040K), 69 are K-type (Teff ~ 3880K-5340K) and 7 are M-type (Teff ~ 2450K-3880K). It is interesting to note that 72.7% of the G-type EBs are detached Algol systems, 63.8 % of the K-type EBs are Algols, and for the M-type EBs, 100% are Algols. The EB light curves can be used to make a first estimate on the temperature ratios of the primary and secondary components from which their physical properties (i.e., radii and masses) can be derived according to stellar models. This method should be more accurate for the detached Algol systems. In this work, some preliminary results on the temperature ratio (T1/T2), radius radio (R1/R2) and mass ratio (q=m1/m2) of the 7 M-type EBs are discussed with a comparison to their corresponding flare activities.