Initial results from nobeyama molecular gas observations of distant bright galaxies

Daisuke Iono, Bunyo Hatsukade, Kotaro Kohno, Ryohei Kawabe, Soh Ikarashi, Kohei Ichikawa, Tadayuki Kodama, Kentaro Motohara, Taku Nakajima, Koichiro Nakanishi, Kouji Ohta, Kazuaki Ota, Toshiki Saito, Kenta Suzuki, Ken Ichi Tadaki, Yoichi Tamura, Junko Ueda, Hideki Umehata, Kiyoto Yabe, Tessei YoshidaSuraphong Yuma, Nario Kuno, Shuro Takano, Hiroyuki Iwashita, Kazuyuki Handa, Aya Higuchi, Akihiko Hirota, Shinichi Ishikawa, Kimihiro Kimura, Jun Maekawa, Hiroshi Mikoshiba, Chieko Miyazawa, Kazuhiko Miyazawa, Kazuyuki Muraoka, Hideo Ogawa, Sachiko Onodera, Yasufumi Saito, Takeshi Sakai, Shigeru Takahashi, Min S. Yun

Research output: Contribution to journalReview articlepeer-review

14 Citations (Scopus)

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 languageEnglish
Pages (from-to)L2
JournalPublications of the Astronomical Society of Japan
Volume64
Issue number4
DOIs
Publication statusPublished - 2012 Aug 25

Keywords

  • Cosmology
  • High-redshift - galaxies
  • Observations - galaxies
  • Starburst - telescopes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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