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

关键词：

D O I：

暂无

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.

引用

页码：392 / 393

页数：2