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astro-ph1999
The Status of the Distance Scale
G. A. Tammann, B. R. Parodi, B. Reindl
Cepheids are the pillar of the extragalactic distance scale, but their reach in distance is not sufficient to calibrate H_0. Yet HST has provided Cepheid distances to eight galaxie…
astro-ph1999
The Distance of the Virgo Cluster
G. A. Tammann, A. Sandage, B. Reindl
Six different distance determination methods of Virgo cluster members yield a mean distance modulus of (m-M)^0(Virgo) = 31.60 +/- 0.09 (20.9 +/- 0.9 Mpc). This value can be carried…
astro-ph1999
The Luminosity Calibration of SNe Ia: Present Status
G. A. Tammann, B. Reindl
Blue Supernovae of Type Ia (SNe Ia) have become the most important objects in cosmology being of exceptionally uniform luminosity. Used as relative distance indicators they map dev…