CO investigation of z=0.4-1.5 galaxies
arXiv:0711.1093 · doi:10.1051/0004-6361:20078294
Abstract
We report on the results of an IRAM-30m search for CO emission lines in three galaxies at intermediate redshifts. The idea was to investigate the molecular content of galaxies bright in the infrared at z=0.4-1.5, a redshift desert for molecular line studies, poorly investigated as of yet. We integrated 8-10h per source and did not succeed in detecting any of the sources. From our upper limits, we are able to constrain the molecular gas content in these systems to less than 4 to 8 x 10^9 Mo, assuming a CO-to-H_2 conversion factor (α=0.8 Mo/(K km s^-1 pc^2)). We stress the current difficulty of selecting sources with a detectable molecular content, a problem that will be faced by the ALMA First Science projects.
6 pages, 5 figures. Accepted for publication in Astronomy and Astrophysics
References in corpus (8)
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- Evolution of the Luminosity Function, Star Formation Rate, Morphology and Size of Star-forming Galaxies Selected at Rest-frame 1500A and 2800A
- Black hole in the West Nucleus of Arp 220
- Dense Molecular Gas and the Role of Star Formation in the Host Galaxies of Quasi-Stellar Objects
- AEGIS: Extinction and Star Formation Tracers from Line Emission
- The FIR-Radio Relationship at High and Low Redshift
- Far-infrared characterization of an ultra-luminous starburst associated with a massively-accreting black hole at z=1.15
- A search for molecular gas in restarting radio galaxies