천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제36권2호
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- Pages.117.2-117.2
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- 2011
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- 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 : 2011.10.05
Abstract
We probe 12CO J=2-1 and 13CO J=1-0 properties of a Virgo disk galaxy, NGC 4402 which is located near the cluster center. Our goal is to study the impact of intra cluster medium (ICM) on the molecular gas of a galaxy in the cluster environment. It has been believed 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 can be easily removed by ram pressure caused by 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 controversy whether dense ISM can be also stripped by the ICM wind or not. NGC 4402 with truncated HI disk(
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