9 papers
Cosmic Expansion and Ho: A Retro- and Pro-Spective Note
G. A. Tammann, B. Reindl
Attempts to measure extragalactic distances over the last 90 years are briefly described. It follows a short history of the discovery of the expansion of space. Reasons are discuss…
Cepheids, Supernovae, Ho, and the Age of the Universe
G. A. Tammann, B. Reindl, F. Thim +2
The local expansion field is mapped using Cepheids, a complete sample of TF distances, and nearby cluster distances. The large-scale field is mapped using Cepheid-calibrated blue S…
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…
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…
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…
The Luminosity Function of Globular Clusters as an Extragalactic Distance Indicator
G. A. Tammann, A. Sandage
The absolute magnitude M* of the peak of the globular cluster luminosity function (GCLF), approximated by a Gaussian, can be calibrated independently in the Galaxy and M 31 through…