CO(J=6-5) Observations of the Quasar SDSS1044-0125 at z = 5.8

Details CO(J=6-5) Observations of the Quasar SDSS1044-0125 at z = 5.8 CO(J=6-5) Observations of the Quasar SDSS1044-0125 at z = 5.8

2001-07-19

arxiv.org/abs/astro-ph/0107369v1

Publ.Astron.Soc.Jap. 53 (2001) 871

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, LaTeX2e, to appear in Publication of Astronomical Society of Japan (PASJ), Postscript file available at

Scientific paper

We present a result of the quasar CO(J=6-5) observations of SDSSp J104433.04-012502.2 at z = 5.8. Ten-days observations with the Nobeyama Millimeter Array yielded an rms noise level of ~ 2.1 mJy/beam in a frequency range from 101.28 GHz to 101.99 GHz at a velocity resolution of 120 km/s. No significant clear emission line was detected in the observed field and frequency range. Three sigma upper limit on the CO(J=6-5) luminosity of the object is 2.8 x 10^10 K km/s pc^2, corresponding to a molecular gas mass of 1.2 x 10^11 Solar Mass, if a conversion factor of 4.5 Solar Mass /(K km/s pc^2) is adopted. The obtained upper limit on CO luminosity is slightly smaller than those observed in quasars at z=4-5 toward which CO emissions are detected.

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