CO observations of the high redshift radio galaxy 53W002

Toru Yamada, Kouji Ohta, Akihiko Tomita, Tadafumi Takata

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7 Citations (Scopus)


We observed a high redshift radio galaxy 53W002 at z=2.390 with the Nobeyama 45 m telescope aiming at a detection of a redshifted 12CO (J=1-0) emission line. The galaxy was discovered in the Leiden Berkeley Deep Survey and is known to have a blue SED and is a candidate for a genuinely young galaxy. We detected a weak (∼5 mJy) emission-line feature at z=2.392; the feature was significant in our November 1993 observations and marginally confirmed in the follow-up observations held in December 1993 and February 1994. If the detected emission-line feature is really a redshifted CO emission line associated with 53W002, its luminosity is 1.2×1011 h-2 K km s-1 pc2 (q0=0.5), or script M sign(H2)∼5×1011 h-2 script M sign, adopting the galactic CO-to-H2 conversion factor.

Original languageEnglish
Pages (from-to)1564-1572
Number of pages9
JournalAstronomical Journal
Issue number4
Publication statusPublished - 1995 Oct

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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