Publication detail

Possible substellar companions in low-mass eclipsing binaries: GU Boo and YY Gem

WOLF, M. KUČÁKOVÁ, H. ZASCHE, P. VRAŠTIL, J. HOŇKOVÁ, K. HORNOCH, K. LEHKÝ, M. MAŠEK, M. ŠMELCER, L. TYLŠAR, M. NOVÁK, R. ČERVINKA, L. BĚLÍK, M.

Original Title

Possible substellar companions in low-mass eclipsing binaries: GU Boo and YY Gem

Type

journal article in Web of Science

Language

English

Original Abstract

We present the next results of our long-term observational project to analyze the variations in the orbital periods of low-mass eclipsing binaries. About 70 new precise mid-eclipse times recorded with a CCD were obtained for two eclipsing binaries with short orbital periods. Observed-minus-calculated diagrams of the stars were analyzed using all reliable timings, and new parameters of the light-time effect were obtained. We derived for the first time or improved the short orbital periods of possible third bodies of 11 and 54 years for these low-mass binaries, respectively. We calculated that the minimum masses of the third components are close to 50 MJup, which corresponds to the mass of brown dwarfs. The multiplicity of these systems also plays an important role in the precise determination of their physical parameters.

Keywords

binaries; eclipsing – stars; late-type – stars; individual; (GU Boo, YY Gem) – stars; fundamental parameters

Authors

WOLF, M.; KUČÁKOVÁ, H.; ZASCHE, P.; VRAŠTIL, J.; HOŇKOVÁ, K.; HORNOCH, K.; LEHKÝ, M.; MAŠEK, M.; ŠMELCER, L.; TYLŠAR, M.; NOVÁK, R.; ČERVINKA, L.; BĚLÍK, M.

Released

30. 11. 2018

Publisher

European Southern Observatory, EDP Sciences

ISBN

0004-6361

Periodical

ASTRONOMY & ASTROPHYSICS

Year of study

619

Number

2018

State

French Republic

Pages from

1

Pages to

7

Pages count

7

URL

https://doi.org/10.1051/0004-6361/201833708

BibTex

@article{BUT150345,
  author="Marek {Wolf} and Hana {Kučáková} and Petr {Zasche} and Jan {Vraštil} and Kateřina {Hoňková} and Kamil {Hornoch} and Martin {Lehký} and Martin {Mašek} and Ladislav {Šmelcer} and Martin {Tylšar} and Rudolf {Novák} and Ladislav {Červinka} and Marcel {Bělík}",
  title="Possible substellar companions in low-mass eclipsing binaries: GU Boo and YY Gem",
  journal="ASTRONOMY & ASTROPHYSICS",
  year="2018",
  volume="619",
  number="2018",
  pages="1--7",
  doi="10.1051/0004-6361/201833708",
  issn="0004-6361",
  url="https://doi.org/10.1051/0004-6361/201833708"
}