Hubble constant at intermediate redshift using the CO-line Tully-Fisher relation

Yoshinori Tutui, Yoshiaki Sofue, Mareki Honma, Takashi Ichikawa, Ken ichi Wakamatsu

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8 Citations (Scopus)


We have determined distances and Hubble ratios for galaxies at intermediate redshifts, cz ∼ 10000 to 35000 km s-1, by applying the CO-line Tully-Fisher relation to our 12CO (J = 1-0)-line observations using the Nobeyama 45-m telescope, and near-IR (NlR) photometry in the J-and H-bands using the 1.88-m telescope at Okayama Astrophysical Observatory. By averaging the Hubble ratios from the J-band result, we obtained a Hubble constant of H0 = 60 ± 10 kms-1 Mpc-1. We argue that the CO line-NIR Tully-Fisher relation can be a complimentary method to the other methods for measuring the distances of galaxies at intermediate and high redshifts.

Original languageEnglish
Pages (from-to)701-712
Number of pages12
JournalPublications of the Astronomical Society of Japan
Issue number5
Publication statusPublished - 2001 Oct 25
Externally publishedYes


  • Cosmology: Hubble constant
  • Galaxies: distances and redshifts
  • ISM: CO line

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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