Shocks as a secondary source of ionization in diffuse ionized gas halos

被引：0
|
作者：
Collins, JA [1 ]
Rand, RJ [1 ]
机构：
[1] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA
来源：
GAS AND GALAXY EVOLUTION: A CONFERENCE IN HONOR OF THE 20TH ANNIVERSARY OF THE VLA | 2001年 / 240卷
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D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Using spectroscopic data for the edge-on spiral NGC 5775, discussed in a paper by Rand in these proceedings, we attempt to address the issue of how Diffuse Ionized Gas (DIG) halos are energized. Data are interpreted in the context of composite photo-ionization/shock models. We find that an increasing contribution from shocks with z is necessary to explain observed line ratios. In addition, the runs of [O-III]/Halpha vs. z in NGC 5775 suggest that shocks make a greater contribution in regions where DIG is of a filamentary morphology.
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页码：392 / 393
页数：2
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