Possible substellar companions in dwarf eclipsing binaries SDSS J143547.87+373338.5, NSVS 7826147, and NSVS 14256825

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00550191" target="_blank" >RIV/67985815:_____/21:00550191 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10432030 RIV/47813059:19630/21:A0000165 RIV/00216224:14310/21:00124108

Výsledek na webu

<a href="https://doi.org/10.1051/0004-6361/202039851" target="_blank" >https://doi.org/10.1051/0004-6361/202039851</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202039851" target="_blank" >10.1051/0004-6361/202039851</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Possible substellar companions in dwarf eclipsing binaries SDSS J143547.87+373338.5, NSVS 7826147, and NSVS 14256825

Popis výsledku v původním jazyce

We present the new results of our long-term observational project to detect the small variations in the orbital periods of low-mass and short-period eclipsing binaries. About 120 new precise mid-eclipse times were obtained for three relatively well-known dwarf eclipsing binaries: SDSS J143547.87+373338.5 (P = 0.126 d), NSVS 07826147 (0.162 d), and NSVS 14256825 (0.110 d). Observed-minus-calculated diagrams of these systems were analyzed using all accurate timings, and, where possible, new parameters of the light-time effect were calculated. For the first time, we derive (or improve upon previous findings with regard to) the short orbital periods of 13 and 10 years of possible third bodies for SDSS J143547.87+373338.5 and NSVS 07826147, respectively. In these binaries, our data show that period variations can be modeled simply on the basis of a single circumbinary object. For the first two objects, we calculated the minimum mass of the third components to be 17 M-jup and 1.4 M-jup respectively, which corresponds to the mass of a brown dwarf or a giant planet. For NSVS 14256825, the cyclical period changes caused by a single additional body cannot be confirmed by our recent eclipse time measurements. More complex behavior connected with two orbiting bodies, or yet unknown effects, should be taken into account.

Název v anglickém jazyce

Possible substellar companions in dwarf eclipsing binaries SDSS J143547.87+373338.5, NSVS 7826147, and NSVS 14256825

Popis výsledku anglicky

We present the new results of our long-term observational project to detect the small variations in the orbital periods of low-mass and short-period eclipsing binaries. About 120 new precise mid-eclipse times were obtained for three relatively well-known dwarf eclipsing binaries: SDSS J143547.87+373338.5 (P = 0.126 d), NSVS 07826147 (0.162 d), and NSVS 14256825 (0.110 d). Observed-minus-calculated diagrams of these systems were analyzed using all accurate timings, and, where possible, new parameters of the light-time effect were calculated. For the first time, we derive (or improve upon previous findings with regard to) the short orbital periods of 13 and 10 years of possible third bodies for SDSS J143547.87+373338.5 and NSVS 07826147, respectively. In these binaries, our data show that period variations can be modeled simply on the basis of a single circumbinary object. For the first two objects, we calculated the minimum mass of the third components to be 17 M-jup and 1.4 M-jup respectively, which corresponds to the mass of a brown dwarf or a giant planet. For NSVS 14256825, the cyclical period changes caused by a single additional body cannot be confirmed by our recent eclipse time measurements. More complex behavior connected with two orbiting bodies, or yet unknown effects, should be taken into account.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA19-01995S" target="_blank" >GA19-01995S: Studium dlouhodobé proměnnosti a podvojnosti jednotlivých klasických a dalších hvězd se závojem s využitím mnoha pozorovacích metod</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

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

647

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

7

Strana od-do

A65

Kód UT WoS článku

000629518900003

EID výsledku v databázi Scopus

2-s2.0-85102472068