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In the era of precision cosmology it is essential to determine the Hubble Constant with an accuracy of 3% or better. Currently, its uncertainty is dominated by the uncertainty in the distance to the Large Magellanic Cloud (LMC) which as the…

This paper presents the first distance measurement to the massive, semi-detached, eclipsing binary LMC-SC1-105, located in the LH 81 association of the Large Magellanic Cloud (LMC). Previously determined parameters of the system are…

Solar and Stellar Astrophysics · Physics 2015-05-27 Alceste Z. Bonanos , Norberto Castro , Lucas M. Macri , Rolf-Peter Kudritzki

We have determined the distance to a second eclipsing binary system (EB) in the Large Magellanic Cloud, HV982 (~B1 IV-V + ~B1 IV-V). The measurement of the distance -- among other properties of the system -- is based on optical photometry…

Astrophysics · Physics 2007-05-23 E. L. Fitzpatrick , I. Ribas , E. F. Guinan , L. E. DeWarf , F. P. Maloney , D. Massa

We present UBV photometry of the eclipsing binary Harvard Variable 2274 in the Large Magellanic Cloud (LMC). The stellar parameters of this binary system were calculated by Guinan et al. (1998a) who gave both a reddening towards HV 2274 of…

Astrophysics · Physics 2009-10-31 C. A. Nelson , K. H. Cook , P. Popowski , D. A. Alves

We present an analysis of a new detached eclipsing binary, OGLE-LMC-ECL-25658, in the Large Magellanic Cloud. The system consists of two late G-type giant stars on an eccentric orbit and orbital period of ~200 days. The system shows total…

We reanalyse the UV/optical spectrum and optical broad-band data of the eclipsing binary HV 2274 in the LMC, and derive its distance following the method given by Guinan et al. (1998a,b) of fitting theoretical spectra to the stars'…

Astrophysics · Physics 2009-10-31 M. A. T. Groenewegen , M. Salaris

We present a new study of late-type eclipsing binary stars in the Small Magellanic Cloud (SMC) undertaken with the aim of improving the distance determination to this important galaxy. A sample of 10 new detached, double-lined eclipsing…

In the era of precision cosmology, it is essential to empirically determine the Hubble constant with an accuracy of one per cent or better. At present, the uncertainty on this constant is dominated by the uncertainty in the calibration of…

The distance to LMC and SMC is a subject of controversy, with the difference between the extreme values in distance moduli exceeding 0.5 mag. While currently the best calibrated method is based on red clump giants, and the near future…

Astrophysics · Physics 2007-05-23 Bohdan Paczynski

We present a distance determination to the Small Magellanic Cloud (SMC) based on an analysis of four detached, long period, late type eclipsing binaries discovered by the OGLE Survey. The components of the binaries show negligible intrinsic…

We present results from a detailed analysis of a third eclipsing binary (EB) system in the Large Magellanic Cloud, EROS 1044 (~B2 IV-V + ~B2 III-IV). Our study combines the "classical" EB study of light and radial velocity curves with…

We have conducted a programme to determine the fundamental parameters of a substantial number of eclipsing binaries of spectral types O and B in the Small Magellanic Cloud. New spectroscopic data, obtained with the two-degree-field…

Astrophysics · Physics 2011-09-29 R. W. Hilditch , I. D. Howarth , T. J. Harries

The preliminary distance to a long period eclipsing binary in the Small Magellanic Cloud SMC108.1.14904 is presented. The binary system contains two non-active G-type bright giants. The orbital period is 185 days and the orbit is circular.…

Cosmology and Nongalactic Astrophysics · Physics 2013-11-07 Dariusz Graczyk , Grzegorz Pietrzynski , Bogumił Pilecki , Ian B. Thompson , Wolfgang Gieren , Piotr Konorski , Andrzej Udalski , Igor Soszynski

The distance modulus of the Large Magellanic Cloud (LMC) is the first step on the determination of the cosmic distance scale. In this paper it is obtained from a new calibration of the classical Cepheid Period-Luminosity (PL) relation. Our…

Astrophysics · Physics 2007-05-23 Xavier Luri , J. Torra , F. Figueras , A. E. Gomez , M. J. Goupil , J. P. Beaulieu

This research paper aims to compare different methods for calculating the distance to the Large Magellanic Cloud (\textit{LMC}). The distance, $d_{LMC}$, is determined using stellar parallax, variable stars (RR Lyrae and Classical…

Astrophysics of Galaxies · Physics 2025-03-28 Juan José Sánchez Medina

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 OGLE I-band light curve of the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 G. Pietrzynski , I. Thompson , D. Graczyk , W. Gieren , A. Udalski , O. Szewczyk , D. Minniti , Z. Kolaczkowski , F. Bresolin , R. -P. Kudritzki

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…

Astrophysics · Physics 2007-05-23 X. Luri , A. E. Gomez , J. Torra , F. Figueras , M. O. Mennessier

Distance to the Large Magellanic Cloud (LMC) is determined using the Cepheid variables in the LMC. We combine the individual LMC Cepheid distances obtained from the infrared surface brightness method and a dataset with a large number of LMC…

Astrophysics · Physics 2015-05-13 C. Ngeow , S. Kanbur

We present the first results of an observational programme to measure the fundamental parameters of over 100 eclipsing binaries in the Small Magellanic Cloud (SMC). The spectroscopic data were obtained by using the 2dF multi-object…

Astrophysics · Physics 2009-11-07 Tim J. Harries , Ron W. Hilditch , Ian D. Howarth

We present a complete set of physical parameters for three early-type eclipsing binary systems in the Large Magellanic Cloud (LMC): OGLE LMC-ECL-17660, OGLE LMC-ECL-18794, and HV 2274, together with the orbital solutions. The first and…

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