Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...438l...5y&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 438, no. 1, p. L5-L7
Astronomy and Astrophysics
Astronomy
8
Carbon Monoxide, Emission Spectra, Line Spectra, Quasars, Radio Astronomy, Radio Spectra, Red Shift, Astronomical Spectroscopy, Extremely High Frequencies, Galactic Evolution, Hydrogen, Luminosity, Millimeter Waves, Molecular Clouds, Starburst Galaxies, Stellar Mass
Scientific paper
We observed a high-redshift luminous radio-quiet quasar Q1235+0857 at z = 2.880 with the Nobeyama 45 m radio telescope aiming at detection of a redshifted (12)CO (J = 3-2) emission line. We have marginally (3-5 sigma significance) detected an emission-line-like feature at approximately 89.8 GHz (z = 2.883) with approximately 150 km/s width full width at half maximum (FWHM). Adopting the standard CO to H2 conversion factor obtained for galactic giant molecular clouds, the CO luminosity can be roughly converted to H2 gas mass of approximately 1012 solar mass, which is much larger than the molecular gas content of any galaxies at present epoch and nearly equal to the total stellar mass of a giant elliptical galaxy. Although we should note that a confirmation of the detection by an independent facility is absolutely needed, the results discussed in this Leter would support the idea that luminous quasars at high redshift are associated with the massive galaxies in their forming phase.
Aoki Kentaro
Ohta Kouji
Takata Tadafumi
Tomita Akihiko
Yamada Toru
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