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:
影响因子:
--
通讯作者:
S. Skinner
中科院分区:
文献类型:
--
作者:
M. Audard;M. Güdel;S. Skinner
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.