The LMC distance modulus from Hipparcos RR Lyrae and classical Cepheid data

Details The LMC distance modulus from Hipparcos RR Lyrae and classical Cepheid data The LMC distance modulus from Hipparcos RR Lyrae and classical Cepheid data

1998-05-15

arxiv.org/abs/astro-ph/9805215v1

Astronomy and Astrophysics

Astrophysics

4 pages, no figures. Accepted for publication at A&A Letters

Scientific paper

The LM method, designed to exploit the Hipparcos data to obtain luminosity calibrations, is applied to derive luminosity calibrations for RR Lyrae and classical Cepheids. From these calibrations the distance to the Large Magellanic Cloud (LMC) is estimated. The distance moduli provided by the two calibrations are in good agreement, giving a value of 18.3m, while several previous calibrations using Hipparcos data provided inconsistent results between both types of stars. This result suggests that the Hubble constant should have a value of H_0 = 79 km s-1 Mpc-1.

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