Gas Kinematics in Three Hickson Compact Groups: The Data

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

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....125.1736p&link_type=abstract

The Astronomical Journal, Volume 125, Issue 4, pp. 1736-1755.

Astronomy and Astrophysics

Astronomy

11

Galaxies: Individual (Ngc 6978), Galaxies: Individual (Ngc 6977), Galaxies: Individual (Ngc 6976), Galaxies: Individual (Ngc 6975), Galaxies: Individual (Ngc 7803), Galaxies: Interactions, Galaxies: Ism, Galaxies: Kinematics And Dynamics, Instrumentation: Interferometers, Galaxies: Intergalactic Medium

Scientific paper

We present Fabry-Perot observations of three Hickson compact groups, HCG 88, 89, and 100. We detect ionized gas in 15 group members, three of which were previously uncataloged objects, two in HCG 89 and one in HCG 100. We were able to derive two-dimensional 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 galaxy. HCG 89 shows members with signs of interactions and galaxies with normal kinematics. We therefore classify HCG 88, 89, and 100, respectively, as an unevolved group, a mildly interacting group, and a system in the final stage of evolution.
Based on observations collected at the European Southern Observatory, La Silla, Chile, and at the Canada-France-Hawaii Telescope, Hawaii.

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