Initial Results from Nobeyama Molecular Gas Observations of Distant Bright Galaxies

• Daisuke lONO

• Bunyo HATSUKADE

• Kotaro KOHNO

Abstract

We present initial results from the CO survey toward high-redshift galaxies using the Nobeyama 45 m 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 $\sim$ 10$^{11}\ M_{\odot}$ and 430–530 km 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 45 m telescope, allowing us to determine redshifts of bright submillimeter selected galaxies without any prior redshift information.

Journal

• Publications of the Astronomical Society of Japan

  Publications of the Astronomical Society of Japan 64 (4), L2-, 2012

  Tokyo : Astronomical Society of Japan

Keywords

• cosmology
• observations
• galaxies
• high-redshift
• starburst
• telescopes

Details

• CRID: 1522543655613371520
• NII Article ID: 10031062648
• NII Book ID: AA1082896X
• ISSN: 00046264
• ISSN: 2053051X
• DOI: 10.1093/pasj/64.4.l2
• NDL BIB ID: 025405269
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025405269
• Web Site: https://academic.oup.com/pasj/article-pdf/64/4/L2/54690873/pasj_64_4_l2.pdf
• Text Lang: en
• NDL Source Classification:
  • ZM33(科学技術--宇宙科学)
• Data Source:
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN