A Rare Low-mass Short-period Eclipsing Binary Candidate With A Close-in Non-coplanar Stellar Companion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00120845" target="_blank" >RIV/00216224:14310/21:00120845 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.newast.2020.101502" target="_blank" >https://doi.org/10.1016/j.newast.2020.101502</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.newast.2020.101502" target="_blank" >10.1016/j.newast.2020.101502</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A Rare Low-mass Short-period Eclipsing Binary Candidate With A Close-in Non-coplanar Stellar Companion

Popis výsledku v původním jazyce

First multi-colour light curves (LCs) of the short-period contact eclipsing binary (CEB) 1SWASP J224747.20351849.3 (hereafter J2247) are presented and analyzed by using the 2013 version of the Wilson-Devinney (W - D) code in this paper. We found that J2247 was a low-mass W-subtype medium CEB. Third light was detected and the average luminosity contribution (l(3)/L-all) was as high as 67.89%. Until now, it is the first reported CEB near the period cut-off with so strong third light. Using the O - C (observed-calculated) method, we analyzed its orbital period variations. We found that its O - C diagram shows a secular increase superimposed on a cyclic oscillation. The orbital period increases at a rate of dP/dt = +1.87 x 10(-7) days yr(-1), which can be explained by the mass transfer from the less massive component to the more massive one. Meanwhile, the 0 - C diagram also displays a cyclic oscillation with a period about 5.17 years and an amplitude of 0.0032 days, which may due to the light-travel time effect (LITE) arising from the gravitational influence of a close-in tertiary component. The mass of the additional component is M(3)sin(i(3)) =0.24(+/- 0.01)M-circle dot, and the orbital distance between the tertiary component and the central binary is about 2.82(+/- 0.05) au. All of these suggest that the third body is not coplanar with the central system, at the same time, the orbital inclination is low. This close-in companion may helps to speed up the formation and evolution of J2247 by drawing angular momentum from the central system.

Název v anglickém jazyce

A Rare Low-mass Short-period Eclipsing Binary Candidate With A Close-in Non-coplanar Stellar Companion

Popis výsledku anglicky

First multi-colour light curves (LCs) of the short-period contact eclipsing binary (CEB) 1SWASP J224747.20351849.3 (hereafter J2247) are presented and analyzed by using the 2013 version of the Wilson-Devinney (W - D) code in this paper. We found that J2247 was a low-mass W-subtype medium CEB. Third light was detected and the average luminosity contribution (l(3)/L-all) was as high as 67.89%. Until now, it is the first reported CEB near the period cut-off with so strong third light. Using the O - C (observed-calculated) method, we analyzed its orbital period variations. We found that its O - C diagram shows a secular increase superimposed on a cyclic oscillation. The orbital period increases at a rate of dP/dt = +1.87 x 10(-7) days yr(-1), which can be explained by the mass transfer from the less massive component to the more massive one. Meanwhile, the 0 - C diagram also displays a cyclic oscillation with a period about 5.17 years and an amplitude of 0.0032 days, which may due to the light-travel time effect (LITE) arising from the gravitational influence of a close-in tertiary component. The mass of the additional component is M(3)sin(i(3)) =0.24(+/- 0.01)M-circle dot, and the orbital distance between the tertiary component and the central binary is about 2.82(+/- 0.05) au. All of these suggest that the third body is not coplanar with the central system, at the same time, the orbital inclination is low. This close-in companion may helps to speed up the formation and evolution of J2247 by drawing angular momentum from the central system.

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

2021

Kód důvěrnosti údajů

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

Název periodika

New Astronomy

ISSN

1384-1076

e-ISSN

1384-1092

Svazek periodika

83

Číslo periodika v rámci svazku

February 2021

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

1-5

Kód UT WoS článku

000579846400019

EID výsledku v databázi Scopus

2-s2.0-85091077781