| dMe耀星的X射线的辐射 |
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| 引用本文： | 赵永恒,宗建霞.dMe耀星的X射线的辐射[J].紫金山天文台台刊,1994,13(1):66-66. |
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| 作者姓名： | 赵永恒 宗建霞 |
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| 摘 要： | From Einstein Observatory, we know most nearby dM flare stars have X-ray emissions. X-ray flare energy of dM stars is far larger than that of large flares of sun. The corona temperature of dM stars is higher than that of sun. The X-ray flare time scales are several minutes to hours. Star corona heating model for X-ray flares is loop model, which provide a mechanism to convert magnetic energy to heat energy in star corona.Within identification of ROSAT X-ray sources, we found that X-ray source: RX1102.0 4347 corresponds to WX UMa, a dM5e flare star, which is in a nearby visual binary: Gliese 412A B. The binary is very near to earth, 5.38pc, and has high proper motion, 4".54/ year. The binary is also an Einstein X-ray source: 1 E1103.0 4346.In March 27, 1993, we observed WX UMa by CCD BVRI photometry at BAO 2.16m telescope. Magnitudes of the star are: V = 14.56, B-V = 1.95, V-R = 0.97, R-I = 2.06, which are similar to previous observations.From the ROSAT X-ray survey data in November 7-17, 1990, average X
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| 关 键 词： | 耀星 X射线 辐射 |
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