The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 37 Issue 1
- /
- Pages.41.1-41.1
- /
- 2012
- /
- 1226-2692(pISSN)
Molecular gas properties under ICM pressure: A Case study of NGC4402
- Hahn, You-Jin (Department of Astronomy, Yonsei University) ;
- Chung, Ae-Ree (Department of Astronomy, Yonsei University)
- Published : 2012.04.03
Abstract
Interactions between the galactic interstellar medium (ISM) and the intra cluster medium (ICM) are believed to be one of the main processes affecting galaxy evolution in cluster environments. The aim of our research is to study the molecular gas properties of a galaxy under the ICM pressure in the cluster environment. It has been well known that cluster galaxies are deficient in atomic hydrogen gas (HI gas) compared to their field counterparts and now there is much evidence that low density ISM is being removed by ram pressure due to ICM wind. Meanwhile, no significant molecular gas deficiency of the cluster galaxy population has been found yet they show overall lower star formation rate than galaxies in the field, and it is still puzzling how the star formation could decrease without stripping of dense molecular gas. To address this issue, we probe the detailed molecular gas properties of NGC 4402, located near the cluster center, as part of a study of four spiral galaxies in the Virgo Cluster. NGC 4402 is well known undergoing ram pressure stripping with a truncated HI disk(
Keywords