High-resolution HI imaging of interacting pairs of post-starburst galaxies

Details High-resolution HI imaging of interacting pairs of post-starburst galaxies High-resolution HI imaging of interacting pairs of post-starburst galaxies

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atnf.prop.1762b&link_type=abstract

ATNF proposal C1959, Semester: October, 2008

Physics

Extragalactic, Atca

Scientific paper

At intermediate-redshifts post-starburst galaxies (or PSGs) constituted a substantial cluster population. Optical observations suggest that PSGs are observed very shortly, within less than 1 Gyr, after the end of a vigorous, abruptly truncated starburst. The trigger and abrupt end of the starburst is still not fully understood, but photometry and numerical simulations suggest the trigger is most likely associated to a galaxy-galaxy merger or interaction. Our deep Parkes and Arecibo observations have uncovered large quantities of neutral hydrogen gas in a significant fraction of PSGs. We now apply for high-resolution interferometric radio observations of the neutral gas of our detections to verify our single dish observations and to derive HI morphologies and velocity fields to investigate a possible merger history.

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