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

Result code in 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>

Alternative codes found

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

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA19-01995S" target="_blank" >GA19-01995S: Studying long-term variability and duplicity of individual classical as well as other Be stars with multi-technique observations</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Volume of the periodical

647

Issue of the periodical within the volume

March

Country of publishing house

FR - FRANCE

Number of pages

7

Pages from-to

A65

UT code for WoS article

000629518900003

EID of the result in the Scopus database

2-s2.0-85102472068