Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9523607w&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
Galaxies, Heavy Elements, Hydrogen, Interstellar Gas, Line Spectra, Lyman Alpha Radiation, Millimeter Waves, Molecular Gases, Red Shift, Sensitivity, Data Bases, Infrared Astronomy Satellite, Infrared Radiation
Scientific paper
A sensitive search for millimeterwave CO emission in 8 damped Lyman-alpha systems, 3 heavy element absorption line systems and one emission line galaxy, at redshifts ranging from 0.5 to 2.8, have yielded upper limits to the amount of molecular gas. The limits still allow relatively high H2 masses, but our results show that damped Lyman-alpha systems are not similar to the hyperluminous infrared galaxies at high redshifts found in the Infrared Astronomical Satellite (IRAS) database. One tentative detection of CO emission at za=2.47 remains, but is very uncertain. We are not able to confirm a claimed detection of CO emission at za=2.14 towards Q0528-250.
Combes François
Wiklind Thomas
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