2005/02/11 by Marcella Marconi, Gisella Clementini · 4 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Scientific Research and Discoveries #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/429525
24 pages, including 4 figures and 5 tables. In press on AJ, May 2005 issue
arxiv created 2005/02/11 · openalex publication_date 2005/04/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We present results from the theoretical modeling of the observed B , V light curves of 14 RR Lyrae stars in the Large Magellanic Cloud. The sample includes seven fundamental and seven first-overtone pulsators covering the metallicity range from -2.12 to -0.79 dex in [Fe/H], with an average value of -1.54 dex. Masses, intrinsic luminosities, effective temperatures, and reddenings were derived by fitting high-accuracy multiband light curves available for these RR Lyrae stars to nonlinear convective pulsation models. Individual distance moduli were determined for each variable and lead to an average distance modulus for the Large Magellanic Cloud of μ 0 = 18.54 ± 0.02 (σ = 0.09 mag, standard deviation of the average), in good agreement with the "long" astronomical distance scale.