H II regions and the value of H(0)

Details H II regions and the value of H(0) H II regions and the value of H(0)

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...143..469t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 143, no. 2, Feb. 1985, p. 469-474.

Astronomy and Astrophysics

Astrophysics

7

Galaxies, H Ii Regions, Hubble Constant, Isophotes, Linearity, Luminosity, Virgo Galactic Cluster

Scientific paper

An approximately linear D3 vs LC relation appears from H II region diameter data of Kennicutt for late-type galaxies, when one excludes distant galaxies which are biased because of selection and, especially, resolution problems, and when a local velocity field model is used in order to derive relative distances. It is shown that the improved relationship is likely to provide useful complementary information on the Hubble constant H(0) within a local velocity field model, though the present inconsistencies in the calibrator data do not yet allow a reliable determination of H(0) in this way. However, a preliminary comparison of the 'long' and 'short' local distance scales, suggested by Sandage and Tammann, and de Vaucouleurs, respectively, seems to indicate that H(0) = 55 km/s Mpc is consistent with the former scale, while H(0) = 100 km/s Mpc is too large in the latter scale, within the present approach to H(0).

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