CO(J=3-2) observations of MS 1512-cB58 at z=2.72

Kouichiro Nakanishi, Kouji Ohta, Tsutomu T. Takeuchi, Masayuki Akiyama, Toru Yamada, Yasuhiro Shioya

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7 Citations (Scopus)


We report on a search for 12CO(J = 3-2) emission line toward MS 1512-cB58, a forming galaxy candidate at z = 2.72. We have observed the object with the 45-m telescope of the Nobeyama Radio Observatory, and found no significant emission. The 3σ upper limit of the CO (J = 3-2) line luminosity is 4.4 × 1010 K km s-1 pc2, assuming a line velocity width of 300 km s-1; this corresponds to a molecular hydrogen mass of 2.0 × 1011M(Fisheye sign), if we assume the Galactic CO-to-H2 conversion factor. A lower limit on the ratio of the Hα line luminosity to the CO luminosity of MS 1512-cB58 is at an upper part of, but within, the range of ratios for nearby galaxies.

Original languageEnglish
Pages (from-to)535-538
Number of pages4
JournalPublications of the Astronomical Society of Japan
Issue number5
Publication statusPublished - 1997


  • CO emission line
  • Galaxies: formation
  • Galaxies: individual (MS 1512-cB58)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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