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- W136308771 abstract "We have determined the distance to a third eclipsing binary (EB) system in the Large Magellanic Cloud, LMC EROS 1044 (m V = 15.2; B2 IV-V + B2 IV-V; P = 2.728 d.). The measurements of the distance and properties of the system are based on optical photometry, UV spectroscopy, and HST UV/optical spectrophotometry. The analysis combines the classical EB study of light and radial velocity curves, which yield the stellar masses, radii and the temperature ratio of the stellar components, with a new analysis of the observed spectral distribution. The UV/optical flux distribution of EROS 1044 is modeled using R.L. Kurucz's ATLAS9 model atmospheres to determine stellar effective temperature, reddening, and a “distance attenuation factor” (R/d). The data consist of HST/FOS (1150-4800 A) and HST/STIS (3000-7500 A) spectrophotometry, thus eliminating the need to include uncertain optical photometry in the analysis. The distance determined is quite robust: resulting from a detailed study of well-understood objects (B stars) in a well-understood evolutionary phase (core H burning), and entirely consistent with stellar evolution calculations. No tunable parameters or zero-point uncertainties are used in the analysis. The analysis is insensitive to stellar metallicity, although the metallicity is explicitly determined and incorporated. The reddening of the system is also determined explicitly. Moreover, the results are independent of statistical averages and are not susceptible to sampling biases. In this poster we describe our technique and present the results for EROS 1044. The results are consistent with those published earlier by us for the EB systems HV2274 and HV982 and offer a very strong argument in favor of the “short” LMC distance scale, corresponding to a distance modulus V 0 M V ~ 18.3 mag." @default.
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- W136308771 date "2001-05-01" @default.
- W136308771 modified "2023-10-18" @default.
- W136308771 title "Accurate Distance to the Large Magellanic Cloud: Analysis of the Eclipsing Binary LMC EROS 1044" @default.
- W136308771 hasPublicationYear "2001" @default.
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