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Extending the Search for Counterrotating Gas and Stars in Galaxies: A Study of Late-Type Dwarfs

J. M. Guie·S. J. Kannappan·Z. Balog·P. Berlind
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Abstract

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.

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J. M. Guie, S. J. Kannappan, Z. Balog, P. Berlind. 2005-07-21. Extending the Search for Counterrotating Gas and Stars in Galaxies: A Study of Late-Type Dwarfs. https://arxiv.org/abs/astro-ph/0507496

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