Observations and light curve solutions of the eclipsing binaries USNO-B1.0 1395-0370184 and USNO-B1.0 1395-0370731

Kjurkchieva D.; Popov V.A.; Vasileva D.; Petrov N.

doi:10.2298/SAJ160328005K

Serbian Astronomical Journal (Jan 2016)

Observations and light curve solutions of the eclipsing binaries USNO-B1.0 1395-0370184 and USNO-B1.0 1395-0370731

Kjurkchieva D.,
Popov V.A.,
Vasileva D.,
Petrov N.

Affiliations

Kjurkchieva D.: Shumen University, Department of Physics, Shumen, Bulgaria
Popov V.A.: IRIDA Observatory, Sofia, Bulgaria
Vasileva D.: Shumen University, Department of Physics, Shumen, Bulgaria
Petrov N.: Bulgarian Academy of Sciences, Institute of Astronomy and NAO, Sofia, Bulgaria

DOI: https://doi.org/10.2298/SAJ160328005K
Journal volume & issue: Vol. 2016, no. 193
pp. 27 – 32

Abstract

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We present follow-up photometric observations in Sloan filters g', i' of the newly discovered eclipsing stars USNO-B1.0 1395-0370184 and USNO-B1.0 1395-0370731. Our data revealed that their orbital periods are considerably bigger than the previous values. This result changed the classification of USNO-B1.0 1395-0370184 from ultrashort-period binary (P=0.197 d) to short-period system (P=0.251 d). The light curve solutions of our observations revealed that USNOB1.0 1395-0370184 and USNO-B1.0 1395-0370731 are overcontact binaries in which components are K dwarfs, close in masses and radii. The light curve distortions were reproduced by cool spots with angular radius of around 20°.

Published in Serbian Astronomical Journal

ISSN: 1450-698X (Print); 1820-9289 (Online)
Publisher: Astronomical Observatory, Department of Astronomy, Belgrade
Country of publisher: Serbia
LCC subjects: Science: Astronomy
Website: http://saj.matf.bg.ac.rs/

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