Molecular Gas in HIZOA J0836-43 - How do you fuel an HI-massive starburst?

Details Molecular Gas in HIZOA J0836-43 - How do you fuel an HI-massive starburst? Molecular Gas in HIZOA J0836-43 - How do you fuel an HI-massive starburst?

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3013c&link_type=abstract

ATNF proposal M394, Semester: April, 2010

Physics

Star Formation, Mopra

Scientific paper

HIZOA J0836-43 is a Malin 1-type HI-massive galaxy undergoing an infrared-luminous starburst. Extended star formation in the disk suggests that the galaxy is a rare example (in the local universe) of inside-out disk-building in a gas-rich galaxy. The galaxy's disk is warped along the eastern side, possibly the result of a recent tidal interaction which may have triggered the starburst. Previous CO observations, using Mopra, detected the double-horned profile of the molecular gas, but the low velocity gas was not detected due to the broad linewidth and high Tsys conditions. We require an accurate measure of the amount of molecular gas (this proposal) to use in conjunction with high spatial resolution information of the HI distribution and its kinematics (addressed in a ATCA proposal in this semester) to reveal fundamental insight into the interplay between gas physics and star formation crucial for understanding and modeling the mechanism fueling the starburst. Additionally, its gas mass fraction is crucial for placing it in an evolutionary context; current comparisons show HIZOA J0836-43 to be an intermediate system compared to local spirals and more distant galaxies (e.g. BzKs).

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