Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534001m&link_type=abstract
American Astronomical Society, AAS Meeting #215, #340.01; Bulletin of the American Astronomical Society, Vol. 42, p.445
Astronomy and Astrophysics
Astronomy
Scientific paper
We have found stellar structures within the tidal tails of twelve different interacting galaxies using F606W- and F814W- band images from the Wide Field Planetary Camera 2 (WFPC2) on the Hubble Space Telescope (HST). These galaxies span the vast physical parameter space of interacting pairs - HI and stellar mass, pressure, and density within the tidal tail environments - and allow a refinement of the conditions in which star cluster formation occurs. The twelve object, seventeen-tail sample of interactions includes a diverse population of tail lengths, optical brightness, merging mass ratios, HI column densities, and stage on the Toomre sequence. Supplementing this study with HST Advanced Camera for Surveys (ACS) data for one of these systems, and including cluster candidates down to fainter limits, we contend that star cluster formation may be an inevitable consequence of galaxy interactions whenever star formation is apparent in such systems.
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