Kinematics and Morphology of Ionized Gas in Hickson Compact Group 18
Open Access
- 1 August 2000
- journal article
- research article
- Published by American Astronomical Society in The Astronomical Journal
- Vol. 120 (2) , 621-629
- https://doi.org/10.1086/301506
Abstract
We present new observations of Hα emission in the Hickson compact group 18 (HCG 18), obtained with a scanning Fabry-Perot interferometer. The velocity field does not show motions of individual group members but instead a complex common velocity field for the whole group. The gas distribution is very asymmetric, with clumps of maximum intensity coinciding with the optically brightest knots. Comparing Hα and H I data, we conclude that HCG 18 is not a compact group but instead a large irregular galaxy with several star-forming clumps.Keywords
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This publication has 23 references indexed in Scilit:
- On the Influence of the Environment on the Star Formation Rates of a Sample of Galaxies in Nearby Compact GroupsThe Astrophysical Journal, 1999
- Extended Ionized Gas Emission and Kinematics of the Compact Group Galaxies in Hickson Compact Group 16: Signatures of MergersThe Astrophysical Journal, 1998
- The Kinematics of the Warm Gas in the Interacting Hickson Compact Group of Galaxies HCG 90The Astronomical Journal, 1998
- Hα Velocity Fields of H [CSC]ii[/CSC] Regions in Nearby Dwarf Irregular GalaxiesThe Astronomical Journal, 1998
- Effects of Interaction‐induced Activities in Hickson Compact Groups: CO and Far‐Infrared StudyThe Astrophysical Journal, 1998
- Star formation in a sample of interacting galaxiesThe Astrophysical Journal, 1989
- IRAS observations of a large sample of normal irregular galaxiesThe Astrophysical Journal, 1989
- Star formation in active dwarf galaxiesThe Astrophysical Journal, 1986
- CCD photometry to V = 21 in a Puppis fieldPublications of the Astronomical Society of the Pacific, 1986
- Local properties of star-forming regions in irregular galaxiesThe Astrophysical Journal, 1982