Gas Kinematics of Three Hickson Compact Groups: The Data

Details Gas Kinematics of Three Hickson Compact Groups: The Data Gas Kinematics of Three Hickson Compact Groups: The Data

2003-01-06

arxiv.org/abs/astro-ph/0301075v1

Astron.Astrophys.402:865-878,2003

Astronomy and Astrophysics

Astrophysics

31 pages, 34 figures. Accepted for publication in Astronomical Journal

Scientific paper

10.1051/0004-6361:20030034

We present Fabry Perot observations of three Hickson Compact Groups, HCG 88, HCG 89 and HCG 100. We detect ionized gas in 15 group members, three of which were previously uncatalogued objects, two in HCG 89 and one in HCG 100. We were able to derive 2D velocity, monochromatic and continuum maps and rotation curves for a total of 12 giant late-type galaxies and two dwarf galaxies. Even with this small sample of three groups, we can clearly see a trend of kinematic evolution and the different evolutionary stages of the groups. The members of HCG 88 show almost no signs of previous or current interactions, while HCG 100 contains at least two merging and one strongly-interacting galaxies. HCG 89 shows members with signs of interactions and galaxies with normal kinematics. We therefore classify HCG 88, HCG 89 and HCG 100 respectively as an unevolved group, a mildly interacting group and a system in the final stage of evolution.

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