Consequences of 0 = 698 KM S -1 MPC -1 from Cepheid Variables in the Leo I Group
Abstract
We examine the consequences of the value of H0 = 69 +/- 8 km s-1 Mpc-1 by Tanvir et al., which is based on the HST Cepheid observation of M96 in Leo I group and smaller by 10%--15% than those derived from surface brightness fluctuation method (SBF), planetary nebulae luminosity function method (PNLF), and Tully-Fisher relation. If we take the HST Cepheid distance of M96 as the correct distance of the Leo I group, there are discrepancies beyond the nominal error in the distance of the Leo I and the Virgo cluster among SBF, PNLF, Tully-Fisher relation, and Cepheids. We argue that the zero-point error of 10%--15% level in the SBF and PNLF distances is the most probable cause of the discrepancy.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1996
- DOI:
- 10.1086/310269
- Bibcode:
- 1996ApJ...469L..73Y
- Keywords:
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- GALAXIES: DISTANCES AND REDSHIFTS;
- COSMOLOGY: DISTANCE SCALE