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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00371912:_____/18:N0000001

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

620

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

7

Strana od-do

„A72-1“-„A72-7“

Kód UT WoS článku

000452389400002

EID výsledku v databázi Scopus

2-s2.0-85058064404