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.

Basic information

Original name

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

Authors

SMELCER, L., M. WOLF, P. ZASCHE, J. KARA, K. HORNOCH, M. ZEJDA, R. F. AUER and Hana KUČÁKOVÁ (203 Czech Republic, belonging to the institution)

Edition

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

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/47813059:19630/23:A0000318

Organization unit

Institute of physics in Opava

UT WoS

000928268000005

Keywords in English

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

Tags

Tags

International impact, Reviewed
Změněno: 31/1/2024 12:38, Mgr. Pavlína Jalůvková

Abstract

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.