Uncovering the Star Formation Mechanism in the Hidden HI-massive galaxy, HIZOA J0836-43

Details Uncovering the Star Formation Mechanism in the Hidden HI-massive galaxy, HIZOA J0836-43 Uncovering the Star Formation Mechanism in the Hidden HI-massive galaxy, HIZOA J0836-43

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3438c&link_type=abstract

ATNF proposal C2325, Semester: October, 2010

Other

Star Formation, Atca

Scientific paper

HIZOA J0836-43 is an HI-massive galaxy located behind the Milky Way, but unlike other Malin 1-type galaxies, it is undergoing an infrared-luminous starburst. The galaxy appears to be a rare (in the local universe) example of inside-out disk-building in a gas-rich galaxy. Its disk is warped along the eastern side, suggesting triggered star formation, possibly due to a recent tidal interaction. The extreme properties and peculiar interstellar medium conditions are unlike any other system seen locally; the galaxy appears to be a ``scaled-up" version of nearby spirals. Given its huge gas reservoir, studying the starburst mechanism of HIZOA J0836-43 could reveal fundamental insight into the interplay between gas physics and star formation, likely resembling processes more common at higher redshift when gas fractions of galaxies were large. We propose to obtain high angular resolution observations of HIZOA J0836-43 that will probe the distribution and kinematics within the HI-disk, explore the interface between the neutral and molecular hydrogen disks and look for feedback effects due to the starburst. Our broader study of this mechanism includes Mopra observations (M394) to determine the extent of the molecular gas reservoir.

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