First apsidal motion and light curve analysis of 162 eccentric
eclipsing binaries from LMC

J 2020

First apsidal motion and light curve analysis of 162 eccentric eclipsing binaries from LMC

ZASCHE, P., M. WOLF, Hana KUČÁKOVÁ, J. KARA, J. MERC et. al.

Basic information

Original name

First apsidal motion and light curve analysis of 162 eccentric eclipsing binaries from LMC

Authors

ZASCHE, P., M. WOLF, Hana KUČÁKOVÁ (203 Czech Republic, belonging to the institution), J. KARA, J. MERC, M. ZEJDA, M. SKARKA, J. JANIK and P. KURFUERST

Edition

Astronomy & Astrophysics, FR - Francouzská republika, 2020, 0004-6361

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

RIV identification code

RIV/47813059:19630/20:A0000070

Organization unit

Institute of physics in Opava

DOI

http://dx.doi.org/10.1051/0004-6361/202037822

UT WoS

000560436900001

Keywords in English

binaries: eclipsing; stars: fundamental parameters; stars: early-type; Magellanic Clouds

Abstract

V originále

We present an extensive study of 162 early-type binary systems located in the LMC galaxy that show apsidal motion and have never been studied before. For the ample systems, we performed light curve and apsidal motion modelling for the first time. These systems have a median orbital period of 2.2 days and typical periods of the apsidal motion were derived to be of the order of decades. We identified two record-breaking systems. The first, OGLE LMC-ECL-22613, shows the shortest known apsidal motion period among systems with main sequence components (6.6 years); it contains a third component with an orbital period of 23 years. The second, OGLE LMC-ECL-17226, is an eccentric system with the shortest known orbital period (0.9879 days) and with quite fast apsidal motion period (11 years). Among the studied systems, 36 new triple-star candidates were identified based on the additional period variations. This represents more than 20% of all studied systems, which is in agreement with the statistics of multiples in our Galaxy. However, the fraction should only be considered as a lower limit of these early-type stars in the LMC because of our method of detection, data coverage, and limited precision of individual times of eclipses.

Citovat

ZASCHE, P., M. WOLF, Hana KUČÁKOVÁ, J. KARA, J. MERC, M. ZEJDA, M. SKARKA, J. JANIK and P. KURFUERST. First apsidal motion and light curve analysis of 162 eccentric eclipsing binaries from LMC. Astronomy & Astrophysics. FR - Francouzská republika, 2020, vol. 640, August, p. "A33-1"-"A33-25", 25 pp. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/202037822.

@article{49340,
   author = {Zasche, P. and Wolf, M. and Kučáková, Hana and Kara, J. and Merc, J. and Zejda, M. and Skarka, M. and Janik, J. and Kurfuerst, P.},
   article_location = {FR - Francouzská republika},
   article_number = {August},
   doi = {http://dx.doi.org/10.1051/0004-6361/202037822},
   keywords = {binaries: eclipsing; stars: fundamental parameters; stars: early-type; Magellanic Clouds},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {First apsidal motion and light curve analysis of 162 eccentric eclipsing binaries from LMC},
   url = {https://www.aanda.org/articles/aa/full_html/2020/08/aa37822-20/aa37822-20.html},
   volume = {640},
   year = {2020}
}

TY  - JOUR
ID  - 49340
AU  - Zasche, P. - Wolf, M. - Kučáková, Hana - Kara, J. - Merc, J. - Zejda, M. - Skarka, M. - Janik, J. - Kurfuerst, P.
PY  - 2020
TI  - First apsidal motion and light curve analysis of 162 eccentric eclipsing binaries from LMC
JF  - Astronomy & Astrophysics
VL  - 640
IS  - August
SP  - "A33-1"-"A33-25"
EP  - "A33-1"-"A33-25"
SN  - 00046361
KW  - binaries: eclipsing
KW  - stars: fundamental parameters
KW  - stars: early-type
KW  - Magellanic Clouds
UR  - https://www.aanda.org/articles/aa/full_html/2020/08/aa37822-20/aa37822-20.html
N2  - We present an extensive study of 162 early-type binary systems located in the LMC galaxy that show apsidal motion and have never been studied before. For the ample systems, we performed light curve and apsidal motion modelling for the first time. These systems have a median orbital period of 2.2 days and typical periods of the apsidal motion were derived to be of the order of decades. We identified two record-breaking systems. The first, OGLE LMC-ECL-22613, shows the shortest known apsidal motion period among systems with main sequence components (6.6 years); it contains a third component with an orbital period of 23 years. The second, OGLE LMC-ECL-17226, is an eccentric system with the shortest known orbital period (0.9879 days) and with quite fast apsidal motion period (11 years). Among the studied systems, 36 new triple-star candidates were identified based on the additional period variations. This represents more than 20% of all studied systems, which is in agreement with the statistics of multiples in our Galaxy. However, the fraction should only be considered as a lower limit of these early-type stars in the LMC because of our method of detection, data coverage, and limited precision of individual times of eclipses.
ER  -

ZASCHE, P., M. WOLF, Hana KUČÁKOVÁ, J. KARA, J. MERC, M. ZEJDA, M. SKARKA, J. JANIK and P. KURFUERST. First apsidal motion and light curve analysis of 162 eccentric eclipsing binaries from LMC. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2020, vol.~640, August, p.~''A33-1''-''A33-25'', 25 pp. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/202037822.

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