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
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.