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Hubble Constant at Intermediate Redshift using the CO-Line Tully-Fisher Relation

Y. Tutui·Y. Sofue·M. Honma·T. Ichikawa·K. Wakamatsu
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Abstract

We have determined distances and Hubble ratios for galaxies at intermediate redshifts, cz=about 10,000 to 35,000 km/s, 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 (NIR) photometry in the J and H bands using the 1.88-m telescope at Okayama Astrophysical Observatory. By averaging the Hubble ratios from J-band result, we obtain a Hubble constant of H_0 = 60 (+/- 10) km/s/Mpc. We argue that the CO line-NIR TFR can be a complimentary method to the other methods for measuring distances of galaxies at intermediate and high redshifts.

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Y. Tutui, Y. Sofue, M. Honma, T. Ichikawa, K. Wakamatsu. 2001-08-29. Hubble Constant at Intermediate Redshift using the CO-Line Tully-Fisher Relation. https://doi.org/10.1093/pasj%2F53.5.701

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