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

1998/05/15 by X. Luri, Luri, X., A. E. Gomez +7
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9805215

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

arxiv created 1998/05/15 · arxiv updated 2009/12/01

Abstract

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 H₀ = 79 km s-1 Mpc-1.

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