Deep Spectroscopy of the Very Extended Ionized Gas of NGC 4388
作者: Michitoshi YoshidaM. YagiS. OkamuraY. OhyamaN. KashikawaT. SasakiK. AokiM. Iya
作者单位: 1Okayama Astrophysical Observatory, Okayama 719-0232, Japan
2National Astronomical Observatory, Japan
3Tokyo University, Japan
4Subaru Telescope
刊名: Symposium - International Astronomical Union, 2016, Vol.217 , pp.386-388
来源数据库: Cambridge University Press Journal
DOI: 10.1017/S0074180900198018
原始语种摘要: We report here the results of deep optical spectroscopy of the very extended emission-line region (VEELR) found serendipitously around the Seyfert 2 galaxy NGC 4388 in the Virgo cluster. The Hα recession velocities of most of the filaments of the region observed are highly blue-shifted with respect to the systemic velocity of the galaxy. The velocity field is complicated, and there seem to be several streams of filaments ranging from ~ −100 km s−1 to ~ −700 km s−1 with respect to the systemic velocity of the galaxy. The emission-line ratios of the VEELR filaments are well explained by power-law photoionization models with solar abundances. In addition to photoionization, shock heating probably contributes to the ionization of the gas. We conclude that the VEELR was...
全文获取路径: Cambridge U Press 

  • galaxy 星系
  • velocity 速度
  • systemic 系统的
  • heating 加热
  • region 地域
  • cluster 
  • recession 后退
  • conclude 结论
  • observed 观察到的
  • ionization 电离化