CO (J=6-5) Observations of the Quasar SDSS 1044-0125 at z=5.8
Abstract
We present a result of CO (J=6-5) observations of a quasar SDSSp J104433.04-012502.2 at z=5.8. Ten days of observations with the Nobeyama Millimeter Array yielded an rms noise level of ~ 2.1 mJy beam-1 in a frequency range from 101.28GHz to 101.99GHz at a velocity resolution of 120km s-1. No significant clear emission line was detected in the observed field and frequency range. The three-sigma upper limit on the CO(J 6-5) luminosity of the object is 2.8 × 1010K km s-1 pc2, corresponding to a molecular gas mass of 1.2 × 1010Msolar, if a conversion factor of 4.5 Msolar(K km s-1 pc2)-1 is adopted. The obtained upper limit on the CO luminosity is slightly smaller than those observed in quasars at z = 4-5 toward which CO emissions are detected.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- October 2001
- DOI:
- 10.1093/pasj/53.5.871
- arXiv:
- arXiv:astro-ph/0107369
- Bibcode:
- 2001PASJ...53..871I
- Keywords:
-
- CO EMISSION LINE;
- GALAXIES: FORMATION;
- GALAXIES: INDIVIDUAL (SDSSP J104433.04-012502.2);
- QUASARS: FORMATION;
- QUASARS: GENERAL;
- Astrophysics
- E-Print:
- 4 pages, 3 figures, LaTeX2e, to appear in Publication of Astronomical Society of Japan (PASJ), Postscript file available at ftp://ftp.kusastro.kyoto-u.ac.jp/pub/iwata/preprint/sdss1044/sdss.ps.gz