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Title: Short apsidal period of three eccentric eclipsing binaries discovered in the Large Magellanic Cloud

Abstract

We present new elements of apsidal motion in three eccentric eclipsing binaries located in the Large Magellanic Cloud. The apsidal motions of the systems were analyzed using both light curves and eclipse timings. The OGLE-III data obtained during the long period of 8 yr (2002-2009) allowed us to determine the apsidal motion period from their analyses. The existence of third light in all selected systems was investigated by light curve analysis. The O – C diagrams of EROS 1018, EROS 1041, and EROS 1054 were analyzed using the 30, 44, and 26 new times of minimum light, respectively, determined from full light curves constructed from EROS, MACHO, OGLE-II, OGLE-III, and our own observations. This enabled a detailed study of the apsidal motion in these systems for the first time. All of the systems have a significant apsidal motion below 100 yr. In particular, EROS 1018 shows a very fast apsidal period of 19.9 ± 2.2 yr in a detached system.

Authors:
; ;  [1];  [2]
  1. Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of)
  2. Department of Astronomy and Space Science, Sejong University, Seoul 143-747 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22340222
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 147; Journal Issue: 6; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BINARY STARS; ECLIPSE; MAGELLANIC CLOUDS; STARS; VISIBLE RADIATION

Citation Formats

Hong, Kyeongsoo, Lee, Chung-Uk, Kim, Seung-Lee, and Kang, Young-Woon. Short apsidal period of three eccentric eclipsing binaries discovered in the Large Magellanic Cloud. United States: N. p., 2014. Web. doi:10.1088/0004-6256/147/6/151.
Hong, Kyeongsoo, Lee, Chung-Uk, Kim, Seung-Lee, & Kang, Young-Woon. Short apsidal period of three eccentric eclipsing binaries discovered in the Large Magellanic Cloud. United States. https://doi.org/10.1088/0004-6256/147/6/151
Hong, Kyeongsoo, Lee, Chung-Uk, Kim, Seung-Lee, and Kang, Young-Woon. 2014. "Short apsidal period of three eccentric eclipsing binaries discovered in the Large Magellanic Cloud". United States. https://doi.org/10.1088/0004-6256/147/6/151.
@article{osti_22340222,
title = {Short apsidal period of three eccentric eclipsing binaries discovered in the Large Magellanic Cloud},
author = {Hong, Kyeongsoo and Lee, Chung-Uk and Kim, Seung-Lee and Kang, Young-Woon},
abstractNote = {We present new elements of apsidal motion in three eccentric eclipsing binaries located in the Large Magellanic Cloud. The apsidal motions of the systems were analyzed using both light curves and eclipse timings. The OGLE-III data obtained during the long period of 8 yr (2002-2009) allowed us to determine the apsidal motion period from their analyses. The existence of third light in all selected systems was investigated by light curve analysis. The O – C diagrams of EROS 1018, EROS 1041, and EROS 1054 were analyzed using the 30, 44, and 26 new times of minimum light, respectively, determined from full light curves constructed from EROS, MACHO, OGLE-II, OGLE-III, and our own observations. This enabled a detailed study of the apsidal motion in these systems for the first time. All of the systems have a significant apsidal motion below 100 yr. In particular, EROS 1018 shows a very fast apsidal period of 19.9 ± 2.2 yr in a detached system.},
doi = {10.1088/0004-6256/147/6/151},
url = {https://www.osti.gov/biblio/22340222}, journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 6,
volume = 147,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 2014},
month = {Sun Jun 01 00:00:00 EDT 2014}
}