Possible substellar companions in low-mass eclipsing binaries: GU Bootis and YY Geminorum

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10391419" target="_blank" >RIV/00216208:11320/18:10391419 - isvavai.cz</a>

Alternative codes found

RIV/67985815:_____/18:00500557 RIV/00098639:_____/18:N0000002

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 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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Type

J_imp - 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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy &amp; Astrophysics [online]

ISSN

1432-0746

e-ISSN

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Volume of the periodical

620

Issue of the periodical within the volume

listopad

Country of publishing house

FR - FRANCE

Number of pages

7

Pages from-to

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UT code for WoS article

000452389400002

EID of the result in the Scopus database

2-s2.0-85058064404