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@article{1216953,
author = {Zasche, Petr and Wolf, Marek and Vraštil, Jan and Liška, Jiří and Skarka, Marek and Zejda, Miloslav},
article_number = {2014},
doi = {http://dx.doi.org/10.1051/0004-6361/201424273},
keywords = {binaries eclipsing; stars early-type; stars general; fundamental parameters; Magellanic Clouds},
language = {eng},
issn = {0004-6361},
journal = {Astronomy & Astrophysics},
title = {Apsidal motion and a light curve solution for eighteen SMC eccentric eclipsing binaries},
volume = {572},
year = {2014}
}
TY - JOUR
ID - 1216953
AU - Zasche, Petr - Wolf, Marek - Vraštil, Jan - Liška, Jiří - Skarka, Marek - Zejda, Miloslav
PY - 2014
TI - Apsidal motion and a light curve solution for eighteen SMC eccentric eclipsing binaries
JF - Astronomy & Astrophysics
VL - 572
IS - 2014
SP - "nestrankovano"
EP - "nestrankovano"
SN - 00046361
KW - binaries eclipsing
KW - stars early-type
KW - stars general
KW - fundamental parameters
KW - Magellanic Clouds
N2 - Aims: The Danish 1.54-meter telescope at the La Silla observatory was used for photometric monitoring of selected eccentric eclipsing binaries located in the Small Magellanic Cloud. The new times of minima were derived for these systems, which are needed for accurate determination of the apsidal motion. Moreover, many new times of minima were derived from the photometric databases OGLE and MACHO. Eighteen early-type eccentric-orbit eclipsing binaries were studied. Methods: Their O-C diagrams of minima timings were analysed and the parameters of the apsidal motion were obtained. The light curves of these eighteen binaries were analysed using the program PHOEBE, giving the light curve parameters. For several systems, the additional third light also was detected. Results: We derived for the first time and significantly improved the relatively short periods of apsidal motion from 19 to 142 years for these systems. The relativistic effects are weak, up to 10% of the total apsidal motion rate. For one system (OGLE-SMC-ECL-0888), the third-body hypothesis was also presented, which agrees with high value of the third light for this system detected during the light curve solution.
ER -
ZASCHE, Petr, Marek WOLF, Jan VRAŠTIL, Jiří LIŠKA, Marek SKARKA a Miloslav ZEJDA. Apsidal motion and a light curve solution for eighteen SMC eccentric eclipsing binaries. \textit{Astronomy \&{} Astrophysics}. roč.~572, č.~2014, s.~''nestrankovano'', 8 s. ISSN~0004-6361. doi:10.1051/0004-6361/201424273. 2014.
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