Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-07-21
Rev.Mex.Astron.Astrof.Ser.Conf.23:111-112,2005
Astronomy and Astrophysics
Astrophysics
2 pages including 2 figures; to appear in The Ninth Texas Mexico Conference on Astrophysics, RevMexAA, Serie de Conferencias,
Scientific paper
In a previous study on gas-stellar counterrotation for a large sample of E/S0 and spiral galaxies (Kannappan & Fabricant 2001), two dwarf irregular galaxies were included, of which one was tentatively identified as a counterrotator. Here we extend the search for counterrotation to include 10 more irregular/spiral dwarf galaxies. We find that all systems with well defined gas and stellar rotation show kinematics consistent with co-rotation. However, we see evidence of decoupled gas and stellar kinematics in >~ 50% of the sample, possibly reflecting minor interactions too small to create large-scale gas-stellar counterrotation.
Balog Zoltan
Berlind Perry
Guie J. M.
Kannappan Sheila J.
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