Confirming the detection of CO in a z=0.33 ULIRG

Details Confirming the detection of CO in a z=0.33 ULIRG Confirming the detection of CO in a z=0.33 ULIRG

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2031n&link_type=abstract

ATNF proposal C1851, Semester: April, 2009

Other

Extragalactic, Atca

Scientific paper

In September 2007, we marginally detected CO in the remarkable ULIRG F00183-7111, but were unable to confirm it because of the limited bandwidth of the ATCA correlator. We were awarded CABB time in 2008APRS, but the delayed installation of CABB resulted in another marginal detection using the old correlator. Here we again request time with CABB to confirm this detection and measure the line profile. The observation has two goals, one astrophysical and one technical. Our astrophysical goal is to measure the profile of the CO, to try to understand the role of molecular gas in this composite AGN/ULIRG source. This source is the most luminous example of an important but poorly-understood step in galaxy evolution. Eventually, we hope to image the CO in the source using longer baselines, and the observation proposed here is the first step towards this. Our technical goal is to test the capability of CABB to measure broad extragalactic mm lines. This will be the first such observation using the ATCA, and we will look for unexpected features (such as baseline ripple) that may affect such observations in the future.

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