A search for tight hierarchical triple systems amongst the eclipsing binaries in the CoRoT fields

T. Hajdu, T. Borkovits, E. Forgács-Dajka, J. Sztakovics, G. Marschalkó, J. M. Benkǒ, P. Klagyivik, M. J. Sallai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report a comprehensive search for hierarchical triple stellar system candidates amongst eclipsing binaries (EBs) observed by the CoRoT spacecraft. We calculate and check eclipse timing variation (ETV) diagrams for almost 1500 EBs in an automated manner. We identify five relatively short period Algol systems for which our combined light-curve and complex ETV analyses (including both the light-travel time effect and short-term dynamical third-body perturbations) resulted in consistent third-body solutions. The computed periods of the outer bodies are between 82 and 272 d (with an alternative solution of 831 d for one of the targets). We find that the inner and outer orbits are near coplanar in all but one case. The dynamical masses of the outer subsystems determined from the ETV analyses are consistent with both the results of our light-curve analyses and the spectroscopic information available in the literature. One of our candidate systems exhibits outer eclipsing events as well, the locations of which are in good agreement with the ETV solution. We also report another certain triply eclipsing triple system that, however, is lacking a reliable ETV solution due to the very short time range of the data, and four new blended systems (composite light curves of two EBs each), where we cannot decide whether the components are gravitationally bounded or not. Amongst these blended systems, we identify the longest period and highest eccentricity EB in the entire CoRoT sample.

Original languageEnglish
Pages (from-to)1230-1245
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Volume471
Issue number1
DOIs
Publication statusPublished - Jan 1 2017

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eclipses
time measurement
light curve
stellar systems
eccentricity
travel time
spacecraft
diagram
travel
perturbation
diagrams
orbits
composite materials

Keywords

  • Binaries: close
  • Binaries: eclipsing
  • Methods: analytical

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

A search for tight hierarchical triple systems amongst the eclipsing binaries in the CoRoT fields. / Hajdu, T.; Borkovits, T.; Forgács-Dajka, E.; Sztakovics, J.; Marschalkó, G.; Benkǒ, J. M.; Klagyivik, P.; Sallai, M. J.

In: Monthly Notices of the Royal Astronomical Society, Vol. 471, No. 1, 01.01.2017, p. 1230-1245.

Research output: Contribution to journalArticle

Hajdu, T, Borkovits, T, Forgács-Dajka, E, Sztakovics, J, Marschalkó, G, Benkǒ, JM, Klagyivik, P & Sallai, MJ 2017, 'A search for tight hierarchical triple systems amongst the eclipsing binaries in the CoRoT fields', Monthly Notices of the Royal Astronomical Society, vol. 471, no. 1, pp. 1230-1245. https://doi.org/10.1093/MNRAS/STX1523
Hajdu, T. ; Borkovits, T. ; Forgács-Dajka, E. ; Sztakovics, J. ; Marschalkó, G. ; Benkǒ, J. M. ; Klagyivik, P. ; Sallai, M. J. / A search for tight hierarchical triple systems amongst the eclipsing binaries in the CoRoT fields. In: Monthly Notices of the Royal Astronomical Society. 2017 ; Vol. 471, No. 1. pp. 1230-1245.
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