Hostname: page-component-cc8bf7c57-n7qbj Total loading time: 0 Render date: 2024-12-12T07:37:45.669Z Has data issue: false hasContentIssue false
  • English
  • Français

Deep Spectroscopy of the Very Extended Ionized Gas of NGC 4388

Published online by Cambridge University Press:  26 May 2016

Michitoshi Yoshida ,
M. Yagi ,
S. Okamura ,
Y. Ohyama ,
N. Kashikawa ,
T. Sasaki ,
K. Aoki  and
M. Iya
Michitoshi Yoshida
Affiliation:
Okayama Astrophysical Observatory, Okayama 719-0232, Japan
M. Yagi
Affiliation:
National Astronomical Observatory, Japan
S. Okamura
Affiliation:
Tokyo University, Japan
Y. Ohyama
Affiliation:
Subaru Telescope
N. Kashikawa
Affiliation:
National Astronomical Observatory, Japan
T. Sasaki
Affiliation:
Subaru Telescope
K. Aoki
Affiliation:
Subaru Telescope
M. Iya
Affiliation:
National Astronomical Observatory, Japan

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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 formerly the disk gas of NGC 4388, which has been stripped by ram pressure due to the interaction between the hot intra-cluster medium (ICM) and the galaxy.

Type
Part 3. Ejection and Outflow
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 386 - 388
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Yoshida, et al. 2002, ApJ, 567, 118.CrossRefGoogle Scholar