Distances for 17 Nearby Galaxies based on the HIPPARCOS Calibration of the P-L Relation

Details Distances for 17 Nearby Galaxies based on the HIPPARCOS Calibration of the P-L Relation Distances for 17 Nearby Galaxies based on the HIPPARCOS Calibration of the P-L Relation

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..629p&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 629-634

Computer Science

9

Scientific paper

From new geometrical parallaxes of galactic Cepheids obtained with the Hipparcos satellite a new calibration of BVRI period-luminosity relations is defined independently of previous determinations. Using a compilation of extragalactic Cepheids new distances are derived for a sample of 17 nearby galaxies. It is shown that the PL relation is affected by a statistical bias. Distances should be increased by about 10 per cent and sometimes more when the statistical bias is taken into account. A comparison with independent results from Feast & Catchpole shows a good agreement and confirms the existence of the statistical bias. From the method of sosies galaxies applied to the Tully-Fisher relation and from Type Ia Supernovae the new calibration leads to a Hubble constant of: H_0=53 +/-6 km/s Mpc^(-1).

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