The araucaria project. Determination of the large magellanic cloud distance from late-type eclipsing binary systems. I. OGLE-051019.64-685812.3

Grzegorz Pietrzyński, Ian B. Thompson, Dariusz Graczyk, Wolfgang Gieren, Andrzej Udalski, Olaf Szewczyk, Dante Minniti, Zbigniew Kołaczkowski, Fabio Bresolin, Rolf Peter Kudritzki

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

59 Citas (Scopus)

Resumen

We have analyzed the double-lined eclipsing binary system OGLE-051019.64-685812.3 in the LMC which consists of two G4 giant components with very similar effective temperatures. A detailed analysis of the Optical Gravitational Lensing Experiment I-band light curve of the system, radial velocity curves for both components derived from high-resolution spectra, and near-infrared magnitudes of the binary system measured outside the eclipses has allowed us to obtain an accurate orbit solution for this eclipsing binary and its fundamental physical parameters. Using a surface brightness (V - K)-color relation for giant stars we have calculated the distance to the system and obtained a true distance modulus of 18.50 mag, with an estimated total uncertainty of 3%. More similar eclipsing binary systems in the LMC which we have discovered and for which we are currently obtaining the relevant data will allow us to better check on the systematics of the method and eventually provide a distance determination to the LMC accurate to 1%, much needed for the calibration of the distance scale.

Idioma originalInglés
Páginas (desde-hasta)862-866
Número de páginas5
PublicaciónAstrophysical Journal
Volumen697
N.º1
DOI
EstadoPublicada - 2009

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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