The IBand TullyFisher Relation and the Hubble Constant
Abstract
The application of the I band TullyFisher relation towards determining the Hubble constant is reviewed, with particular attention to the impact of scatter and bias corrections in the relation. A template relation is derived from galaxies in 24 clusters. A subset of 14 clusters with cz ~ 4000 to 9000 km/s is used as an inertial frame to define the velocity zero point of the relation. Twelve galaxies with Cepheid distances are used to establish the absolute magnitude scale of the TullyFisher relation, and thus to determine a value of H_not = 70\pm5 km/s/Mpc. Estimates of the peculiar velocities of the Virgo and Fornax clusters are also given. Assuming that the distance to Fornax is 18.2 Mpc (N1365), H_not = 76\pm8 km/s/Mpc. Assuming that Virgo lies at 17.4 Mpc (M100, N4496, N4639), H_not = 67\pm8 km/s/Mpc.
 Publication:

The Extragalactic Distance Scale
 Pub Date:
 1997
 arXiv:
 arXiv:astroph/9610116
 Bibcode:
 1997eds..proc..113G
 Keywords:

 Galactic Structure;
 Hubble Constant;
 Galactic Clusters;
 Cepheid Variables;
 Velocity Distribution;
 Templates;
 Virgo Galactic Cluster;
 Distance;
 Astronomy;
 Astrophysics
 EPrint:
 18 pages, 5 tables, 5 figures embedded by psfig