Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop..713f&link_type=abstract
ATNF proposal C1654, Semester: April, 2007
Astronomy and Astrophysics
Astrophysics
Extragalactic, Atca
Scientific paper
Expoloring the molecular gas content in high-redshift galaxies --- through the Carbon Monoxide (CO) emission line --- is a new and exciting field of astrophysics; one that promises to shed light on the star formation properties of distant, young, evolving galaxies. To first order, CO is a very good tracer of the fuel and the site for star formation, but to date only a handful of galaxies at z>1 have been studied. We propose a search for CO(1-0) line emission from two z~2 radio galaxies using the new 7mm system on the ATCA. These are the spiderweb galaxy (MRC 1138-262) at z=2.16 and S265 at z=1.856, recently discovered in the ATLAS-CDFS deep field. The experiment requires 5x8 hours per galaxy, or a total requested observing time of 80 hours. In the local universe, radio galaxies are hosted by massive, old elliptical galaxies that have already exhausted their molecular gas reservoirs and have little ongoing star formation. CO observations of high-redshift radio galaxies will therefore allow us to uncover the star formation histories of the most massive galaxies in the Universe.
Ekers Ron
Feain Ilana
Middelberg Enno
Miley George
Norris Ray
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