J 2023

A photometric study of NSVS 7453183: a probable quadruple system with long-term surface activity

SMELCER, L., M. WOLF, P. ZASCHE, J. KARA, K. HORNOCH et. al.

Základní údaje

Originální název

A photometric study of NSVS 7453183: a probable quadruple system with long-term surface activity

Autoři

SMELCER, L., M. WOLF, P. ZASCHE, J. KARA, K. HORNOCH, M. ZEJDA, R. F. AUER a Hana KUČÁKOVÁ (203 Česká republika, domácí)

Vydání

Monthly Notices of the Royal Astronomical Society, 2023, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Kód RIV

RIV/47813059:19630/23:A0000318

Organizační jednotka

Fyzikální ústav v Opavě

UT WoS

000928268000005

Klíčová slova anglicky

stars: activity;binaries: close;binaries: eclipsing;stars: fundamental parameters;stars: individual: NSVS 7453183;stars: low-mass

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 31. 1. 2024 12:38, Mgr. Pavlína Jalůvková

Anotace

V originále

The VRC light curves were regularly measured for the eclipsing binary NSVS 7453183 as a part of our long-term observational project for studying of low-mass eclipsing binaries with a short orbital period and surface activity. The TESS light curve solution in phoebe results to the detached configuration, where the temperature of primary component was adopted to T-1 = 4300K according to the SED approximation. It gives us T-2 = 4080 +/- 100K for the secondary component. The spectral type of the primary component was estimated to be K6, and the photometric mass ratio was derived q = 0.86. We confirm presence of the third body in this system, a stellar companion with a minimal mass 0.33M(circle dot) orbiting the eclipsing pair with a short period about 425 days, and propose the next, fourth body with a longer orbiting period of about 12 years, probably a brown dwarf with the minimal mass of 50M(Jup). The hierarchical structure ((1+1)+1) + 1 of this quadruple system is assumed. Characteristics and temporal variations of the dark region on the surface of the primary component were estimated. The average migration speed of about 10 degrees per month was found during years 2020-2022.