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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU129178" target="_blank" >RIV/00216305:26110/18:PU129178 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/0004-6361/201833708" target="_blank" >https://doi.org/10.1051/0004-6361/201833708</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201833708" target="_blank" >10.1051/0004-6361/201833708</a>

Result language
angličtina
Original language name
Possible substellar companions in low-mass eclipsing binaries: GU Boo and YY Gem
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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