The Araucaria project: eclipsing binaries in SMC

DOI

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 Optical Gravitational Lensing Experiment (OGLE) survey. The components of the binaries show negligible intrinsic variability. A consistent set of stellar parameters was derived with low statistical and systematic uncertainty. The absolute dimensions of the stars are calculated with a precision of better than 3%. The surface brightness-infrared color relation was used to derive the distance to each binary. The four systems clump around a distance modulus of (m - M) = 18.99 with a dispersion of only 0.05 mag. Combining these results with the distance published by Graczyk et al. for the eclipsing binary OGLE SMC113.3 4007, we obtain a mean distance modulus to the SMC of 18.965+/-0.025 (stat.)+/-0.048 (syst.) mag. This corresponds to a distance of 62.1+/-1.9 kpc, where the error includes both uncertainties. Taking into account other recent published determinations of the SMC distance we calculated the distance modulus difference between the SMC and the Large Magellanic Cloud equal to 0.458+/-0.068 mag. Finally, we advocate {mu}SMC= 18.95+/-0.07 as a new "canonical" value of the distance modulus to this galaxy.

Cone search capability for table J/ApJ/780/59/table1 (The target stars)

Identifier
DOI http://doi.org/10.26093/cds/vizier.17800059
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/780/59
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/780/59
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/780/59
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/780/59
Provenance
Creator Graczyk D.; Pietrzynski G.; Thompson I.B.; Gieren W.; Pilecki B.,Konorski P.; Udalski A.; Soszynski I.; Villanova S.; Gorski M.,Suchomska K.; Karczmarek P.; Kudritzki R.-P.; Bresolin F.; Gallenne A.
Publisher CDS
Publication Year 2015
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy