Dense molecular gas in quasar host galaxies: a search for HCN emission from BR B1202-0725 at z=4.695

Abstract

We report on the results of a search using the VLA for redshifted HCN(1-0) emission from the host galaxy of BR B1202-0725, an optically luminous quasar at z=4.695. The host galaxy emits strongly in the rest-frame far-infrared, and shows characteristics very similar to that of more local, ultraluminous infrared galaxies, in which a significant fraction of the far-infrared emission is powered by star formation. We find a 3-sigma upper limit to the HCN(1-0) emission of 4.9 x 10^10 K kms^-1 pc^2, assuming a lambda-cosmology. This limit is consistent with correlations derived from measurements of the HCN, CO, and far-infrared emission for a sample of more local galaxies, including starbursts (Solomon et al, 1992a).

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Cited by in corpus (8)

• HCN Observations of Dense Star-Forming Gas in High Redshift Galaxies
• A Search for Dense Molecular Gas in High Redshift Infrared-Luminous Galaxies
• A Study of CO Emission in High Redshift QSOs Using the Owens Valley Millimeter Array
• The Growth of Black Holes and Their Host Spheroids in (Sub)mm-loud QSOs at High Redshift
• A broadband spectroscopic search for CO line emission in HDF850.1: the brightest submillimetre object in the Hubble Deep Field North
• A Search for Dense Gas in Luminous Submillimeter Galaxies with the 100-m Green Bank Telescope
• High dense gas fraction in a gas-rich star-forming galaxy at z = 1.2
• Observations of [OI]63micron line emission in main-sequence galaxies at z~1.5