Eclipsing binary stars in the Large Magellanic Cloud: results from the EROS-2, OGLE and VMC surveys - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2014

Eclipsing binary stars in the Large Magellanic Cloud: results from the EROS-2, OGLE and VMC surveys

T. Muraveva
  • Function : Author
G. Clementini
  • Function : Author
C. Maceroni
  • Function : Author
C. J. Evans
  • Function : Author
M. I. Moretti
  • Function : Author
M. -R. L. Cioni
  • Function : Author
V. Ripepi
R. de Grijs
  • Function : Author
M. A. T. Groenewegen
  • Function : Author
A. E. Piatti
  • Function : Author
J. Th. van Loon
  • Function : Author

Abstract

We present a catalogue of 1768 eclipsing binary stars (EBs) detected in the Large Magellanic Cloud (LMC) by the second generation of the EROS survey (hereinafter EROS-2); 493 of them are new discoveries located in outer regions (out of the central bar) of the LMC. These sources were originally included in a list of candidate classical Cepheids (CCs) extracted from the EROS-2 catalogue on the basis of the period (0.89 < PEROS < 15.85 d) versus luminosity [13.39 < EROS> < 17.82 mag] diagram. After visual inspection of the light curves we reclassified them as eclipsing binaries. They have blue colours (BEROS - REROS < 0.2 mag) hence we classed them as hot eclipsing binaries (HEBs) containing hot massive components: main sequence (MS) stars or blue giants. We present Ks-band light curves for 999 binaries from our sample that have a counterpart in the VISTA near-infrared ESO public survey of the Magellanic Clouds system (VMC). We provide spectral classifications of 13 HEBs with existing spectroscopy. We divided our sample into contact-like binaries and detached/semi-detached systems based on both visual inspection and the parameters of the Fourier decomposition of the light curves and analysed the period-luminosity (PL) relations of the contact-like systems using the REROS and Ks magnitudes at maximum light. The contact-like binaries in our sample do not follow PL relations. We analysed the sample of contact binaries from the OGLE III catalogue and confirmed that PLI and PL_{K_s} sequences are defined only by eclipsing binaries containing a red giant component.
Fichier principal
Vignette du fichier
stu1151.pdf (1.49 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03645321 , version 1 (25-04-2022)

Identifiers

Cite

T. Muraveva, G. Clementini, C. Maceroni, C. J. Evans, M. I. Moretti, et al.. Eclipsing binary stars in the Large Magellanic Cloud: results from the EROS-2, OGLE and VMC surveys. Monthly Notices of the Royal Astronomical Society, 2014, 443, pp.432-445. ⟨10.1093/mnras/stu1151⟩. ⟨insu-03645321⟩
7 View
8 Download

Altmetric

Share

Gmail Facebook X LinkedIn More