Separating the X-Ray Emissions of UV Ceti A and B with Chandra

Separating the X-Ray Emissions of UV Ceti A and B with Chandra
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使用 Chandra 分离 UV Ceti A 和 B 的 X 射线发射

DOI:
10.1086/374710
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发表时间:
2003
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
S. Skinner
S. Skinner
中科院分区:
--
文献类型:
--
作者:
M. Audard;M. Güdel;S. Skinner

文献摘要

被引文献

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我们利用 Chandra 首次对活跃的 UV Ceti 双星进行了空间分离的 X 射线观测,提供了有关其几乎相同的 dM5.5e 组件的相对 X 射线活动水平的重要新信息。这两个组件在低水平时期具有相似的 X 射线光度,并且源自低能透射光栅光谱的发射测量位点揭示了相似的日冕温度 (3-6 MK)。然而,B 组分表现出更高程度的变异性,导致平均 X 射线光度高于 UV Cet A。我们讨论了 UV Cet B 中活性增强的可能原因。
We present the first spatially separated X-ray observation of the active UV Ceti binary with Chandra, providing important new information on the relative X-ray activity levels of its nearly identical dM5.5e components. The two components had similar X-ray luminosities during low-level periods, and emission measure loci derived from Low Energy Transmission Grating spectra reveal similar coronal temperatures (3-6 MK). However, the B component showed a higher degree of variability, resulting in a higher average X-ray luminosity than that of UV Cet A. We discuss possible causes of this enhanced activity in UV Cet B.