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| Paper: |
Neutral Gas in Interacting Ocular Galaxies |
| Volume: |
320, The Neutral ISM in Starburst Galaxies |
| Page: |
81 |
| Authors: |
Thomasson, M. |
| Abstract: |
A close prograde in-plane encounter produces a short-lived eyeshaped, or ocular, feature in the disk galaxy suffering the encounter. This feature can be used as a diagnostic of the type of encounter − indicating the orbit configuration. Towards the end of the ocular phase, a central starburst may develop. Other signs of recent star formation in this type of systems, e.g. super star clusters, are not necessarily connected to the tidal interaction. As predicted by simulations, massive gas clouds can be observed (mainly in HI) in the tidal features, and sometimes the orbit of one of the galaxies can be directly observed as a galactic gravitational wake in the extended HI envelope of the other galaxy. Observations of HI and CO in three systems are presented: IC 2163/NGC 2207, NGC 2535/36 and NGC 5394/95. |
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