Optical flares from the faint mid-dM star 2MASS J00453912+4140395
Optical flares from the faint mid-dM star 2MASS J00453912+4140395
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来自微弱中dM恒星的光学耀斑2MASS J00453912 4140395
DOI：
10.1002/asna.200710756
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
K. Ol'ah
中科院分区：
文献类型：
--
作者：
Zs. KHov'ari;F. Vilardell;I. Ribas;K. Vida;L. Driel;C. Jordi;K. Ol'ah
我们给出了用艾萨克·牛顿2.5米望远镜(拉帕尔马)的广视场相机获得的大型恒星耀斑的B和V光曲线。源天体是仙女座星系视野中的一颗微弱的前景恒星(MV=21.38)，其最可能的光谱类型是DM4。我们给出了在光学范围内的总耀斑能量的估计，并且发现它大约是1035erg。大耀斑的冷却阶段显示了另外三个类似弱耀斑的事件，我们将其解释为太阳在大型日冕物质抛射期间也观察到了触发机制的结果。(2007 Wiley-VCH Verlag GmbH&Co.KGaA，Weinheim)
We present B and V light curves of a large stellar flare obtained with the Wide Field Camera at the Isaac Newton 2.5-m telescope (La Palma). The source object is a faint (mV = 21.38) foreground star in the field of the Andromeda galaxy, with its most probable spectral type being dM4. We provide an estimate of the total flare energy in the optical range and find it to be of the order of 1035 erg. The cooling phase of the large flare shows three additional weak flare-like events, which we interpret as results of a triggering mechanism also observed on the Sun during large coronal mass ejections. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)