Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F18%3AA0000356" target="_blank" >RIV/47813059:19240/18:A0000356 - isvavai.cz</a>
Alternative codes found
RIV/00371912:_____/18:N0000001
Result on the web
<a href="https://www.aanda.org/articles/aa/abs/2018/12/aa33708-18/aa33708-18.html" target="_blank" >https://www.aanda.org/articles/aa/abs/2018/12/aa33708-18/aa33708-18.html</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201833708" target="_blank" >10.1051/0004-6361/201833708</a>
Alternative languages
Result language
angličtina
Original language name
Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum
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: GU Boo (P = 0.^{d}49) and YY Gem (0.^{d}81). 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 M_{Jup}, 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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Classification
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)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
1432-0746
Volume of the periodical
620
Issue of the periodical within the volume
December
Country of publishing house
FR - FRANCE
Number of pages
7
Pages from-to
„A72-1“-„A72-7“
UT code for WoS article
000452389400002
EID of the result in the Scopus database
2-s2.0-85058064404