Abstract
We present initial results from the CO survey toward high-redshift galaxies using the Nobeyama 45m telescope. Using a new wide bandwidth spectrometer equipped with a two-beam SIS receiver, we have obtained three new detections of high-redshift (z = 1.6-3.4) submillimeter galaxies (SXDF 1100.001/HXMM02, SDP9, and SDP17), one tentative detection (SDSS J160705+533558), and one non-detection (COSMOS-AzTEC1). The galaxies observed during the commissioning phase are sources with known spectroscopic redshifts from previous optical or wide-band submillimeter spectroscopy. The derived molecular gas mass and line widths from Gaussian fits are ∼ 1011 M⊙ and 430-530km s -1, respectively, which are consistent with previous CO observations of distant submillimeter galaxies and quasars. The spectrometer, which realizes a maximum of 32 GHz instantaneous bandwidth, will provide new science capabilities at the Nobeyama 45m telescope, allowing us to determine redshifts of bright submillimeter selected galaxies without any prior redshift information.
Original language | English |
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Pages (from-to) | L2 |
Journal | Publications of the Astronomical Society of Japan |
Volume | 64 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2012 Aug 25 |
Externally published | Yes |
Keywords
- Cosmology
- High-redshift - galaxies
- Observations - galaxies
- Starburst - telescopes
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science