NGC 5775 and NGC 2613 - On high latitude HI and lagging halos

被引：0
|
作者：
Irwin, JA [1 ]
Chaves, TA [1 ]
Lee, SW [1 ]
机构：
[1] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada
来源：
SEEING THROUGH THE DUST: THE DETECTION OF HI AND THE EXPLORATION OF THE ISM IN GALAXIES, PROCEEDINGS | 2002年 / 276卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The edge-on galaxies, NGC 5775 and NGC 2613, show discrete Hi features which span the disk-halo interface, in some cases to very high z (up to 21 kpc). NGC 5775 shows evidence for a lagging halo up to 5 to 6 kpc from the plane; however, such a lag is not obvious in NGC 2613, possibly due to its lower inclination. If the H I feature survives to very high latitude, a velocity gradient is no longer observed, suggesting that the feature emerges from the disk-halo transition region into a different environment. In this regime, some of the features break up into many clumps over a wide velocity range similar to Population 11 dynamics. Thus, discrete H I features may be used as probes of the disk-halo interface.
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页码：406 / 409
页数：4
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