High resolution observations of a starburst at z=0.223: resolved CO(1-0)

Abstract

We present the results of CO(1-0) emission mapping with the IRAM interferometer, at \sim 1 arcsec, resolution, of the z=0.223 ultra-luminous starburst IRAS 11582+3020. This galaxy was selected from an IRAM-30m survey of 30 galaxies at moderate redshift (z \sim 0.2-0.6) to explore galaxy evolution and in particular the star formation efficiency, in the redshift range filling the gap between local and very high-z objects. The CO emission is kinematically resolved, and about 50% of the total emission found in the 27 arcsec (97 kpc) single dish beam is not recovered by the interferometer. This indicates that some extended emission may be present on large scales (typically 7-15 arcsec). The FIR-to-CO luminosity ratio follows the trend between local and high-z ultra-luminous starbursts.

arXiv comment4 pages, 5 figures, accepted A&A Letters, extended-PdB special issue

References in corpus (17)

• The Global Schmidt Law in Star Forming Galaxies
• Rotating Nuclear Rings and Extreme Starbursts in Ultraluminous Galaxies
• The Star Formation History of Field Galaxies
• The Molecular Interstellar Medium in Ultraluminous Infrared Galaxies
• Outflows in Infrared-Luminous Starbursts at z < 0.5. II. Analysis and Discussion
• High-resolution Millimeter Imaging of Submillimeter Galaxies
• Optical and Near-Infrared Imaging of the IRAS 1-Jy Sample of Ultraluminous Infrared Galaxies: II. The Analysis
• The history of star formation in dusty galaxies
• Hubble Space Telescope imaging of the CFRS and LDSS redshift surveys - IV. Influence of mergers in the evolution of faint field galaxies from z~1
• Resolved Molecular Gas in a Quasar Host Galaxy at Redshift z=6.42
• CO(1-0) in z >/~ 4 Quasar Host Galaxies: No Evidence for Extended Molecular Gas Reservoirs
• The IRAS 1-Jy Survey of Ultraluminous Infrared Galaxies: II. Optical Spectroscopy
• Dust-obscured star formation and AGN fuelling in hierarchical models of galaxy evolution
• Optical and Near-Infrared Imaging of the IRAS 1-Jy Sample of Ultraluminous Infrared Galaxies: I. The Atlas
• The AGN Content of Ultraluminous IR Galaxies: High Resolution VLA Imaging of the IRAS 1Jy ULIRG Sample
• Collision-induced galaxy formation: semi-analytical model and multi-wavelength predictions
• Gas and Dust in Protogalaxies

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