Warm disk coronae in classical T Tauri stars

被引:53
|
作者
Kwan, J
机构
[1] Department of Physics and Astronomy, University of Massachusetts, Amherst
来源
ASTROPHYSICAL JOURNAL | 1997年 / 489卷 / 01期
关键词
accretion; accretion disks; stars; coronae; pre-main-sequence;
D O I
10.1086/304773
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
It is proposed that a warm disk corona is a characteristic feature of the accretion process in a classical T Tauri star, based on analyses of the [O I] lambda lambda 6300, 5577 emission and the central absorptions in the Balmer lines of hydrogen. Calculations are presented to determine the physical conditions needed to produce the hydrogen and O I excitation. They indicate that a substantial fraction of the energy released in the accretion of matter through the disk may be dissipated at the disk surface in order to heat the corona.
引用
收藏
页码:284 / 292
页数:9
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