Atomic carbon and CO at redshift 2.5

Details Atomic carbon and CO at redshift 2.5 Atomic carbon and CO at redshift 2.5

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329p..84w&link_type=abstract

Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Detections of large amounts of dust and gas in distant quasars have opened up the possibility of studying molecular gas properties in the early epoch of galaxy formation and of providing fundamental constraints on galaxy evolution. Molecular gas masses in excess of 1010 M&sun; have led to the hypothesis that the tremendous far-infrared luminosities (> 1012 L&sun;) of these objects are powered not only by black holes but also by major starbursts which might be forming cores of elliptical galaxies or bulges of massive spiral galaxies. We report on an in-depth study of the molecular gas properties of the two brightest dusty quasars at redshifts > 2, the Cloverleaf quasar and IRAS F10214. Our analysis is based on observations at the IRAM interferometer and the IRAM 30m telescope of both of the neutral carbon fine structure lines, of the complete CO ladder between CO(3-2) and CO(8-7), and of the dust continuum. We discuss the excitation conditions, the distribution of the molecular gas and the implications for the quasar-starburst connection in the early epoch of galaxy formation. Up to now, comparable data sets exist only for the Milky Way and the central region of M82. It will be a primary task of ALMA to observe these important tracers of the molecular gas routinely, both in nearby galaxies and in high-redshift objects.

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