TESS light curves and period changes in low-mass eclipsing
binary BB Persei

J 2025

TESS light curves and period changes in low-mass eclipsing binary BB Persei

WOLF, Marek; Petr ZASCHE; Miloslav ZEJDA; Martin MASEK; Andrej MUDRAY et al.

Basic information

Original name

TESS light curves and period changes in low-mass eclipsing binary BB Persei

Authors

WOLF, Marek; Petr ZASCHE; Miloslav ZEJDA; Martin MASEK; Andrej MUDRAY; Hana KUČÁKOVÁ; Waldemar OGLOZA; Jaroslav MERC; Jan KARA and Vojtech DIENSTBIER

Edition

NEW ASTRONOMY, 2025, 1384-1076

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10308 Astronomy

Country of publisher

Netherlands

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 2.100 in 2024

Organization unit

Institute of physics in Opava

DOI

https://doi.org/10.1016/j.newast.2025.102406

UT WoS

001454813900001

EID Scopus

2-s2.0-105000645397

Keywords in English

Binaries;Eclipsing Binaries;Close Binaries;Low-mass Stars;Activity Stars;Fundamental parameters Stars;Individual;BB Per

Abstract

In the original language

We present a detailed analysis of the low-mass detached eclipsing binary system BB Persei, which contains two K-type stars in a circular orbit with a short period of 0.4856 d. We used light curves from the Transiting Exoplanet Survey Satellite (Tess), which observed BB Per in five sectors, to determine its photometric properties and a precise orbital ephemeris. The solution of the Tess light curve in PHOEBE results in a detached configuration, where the temperature of the primary component was fixed to T1 = 5 300 K according to LAMOsT, which gives us T2 = 5050 +/- 50 K for the secondary. The spectral type of the primary component was derived as K0 and the photometric mass ratio was estimated q = 0.90. Slow period changes on the current O-C diagram spanning the past 25 years indicate the presence of a third body orbiting the eclipsing pair with an orbital period of about 22 years. The companion could be a red dwarf of spectral type M6-M7 with a minimal mass of about 0.1 M ae. The characteristics and temporal variation of the dark region on the surface of the secondary component were estimated.

Cite

WOLF, Marek; Petr ZASCHE; Miloslav ZEJDA; Martin MASEK; Andrej MUDRAY; Hana KUČÁKOVÁ; Waldemar OGLOZA; Jaroslav MERC; Jan KARA and Vojtech DIENSTBIER. TESS light curves and period changes in low-mass eclipsing binary BB Persei. NEW ASTRONOMY. 2025, vol. 119, October 2025, p. "102406-1"-"102406-7", 7 pp. ISSN 1384-1076. Available from: https://doi.org/10.1016/j.newast.2025.102406.

@article{90441,
   author = {Wolf, Marek and Zasche, Petr and Zejda, Miloslav and Masek, Martin and Mudray, Andrej and Kučáková, Hana and Ogloza, Waldemar and Merc, Jaroslav and Kara, Jan and Dienstbier, Vojtech},
   article_number = {October 2025},
   doi = {https://doi.org/10.1016/j.newast.2025.102406},
   keywords = {Binaries;Eclipsing Binaries;Close Binaries;Low-mass Stars;Activity Stars;Fundamental parameters Stars;Individual;BB Per},
   language = {eng},
   issn = {1384-1076},
   journal = {NEW ASTRONOMY},
   title = {TESS light curves and period changes in low-mass eclipsing binary BB Persei},
   url = {https://www.sciencedirect.com/science/article/pii/S1384107625000557?via%3Dihub},
   volume = {119},
   year = {2025}
}

TY  - JOUR
ID  - 90441
AU  - Wolf, Marek - Zasche, Petr - Zejda, Miloslav - Masek, Martin - Mudray, Andrej - Kučáková, Hana - Ogloza, Waldemar - Merc, Jaroslav - Kara, Jan - Dienstbier, Vojtech
PY  - 2025
TI  - TESS light curves and period changes in low-mass eclipsing binary BB Persei
JF  - NEW ASTRONOMY
VL  - 119
IS  - October 2025
SP  - "102406-1"-"102406-7"
EP  - "102406-1"-"102406-7"
SN  - 13841076
KW  - Binaries;Eclipsing Binaries;Close Binaries;Low-mass Stars;Activity Stars;Fundamental parameters Stars;Individual;BB Per
UR  - https://www.sciencedirect.com/science/article/pii/S1384107625000557?via%3Dihub
N2  - We present a detailed analysis of the low-mass detached eclipsing binary system BB Persei, which contains two K-type stars in a circular orbit with a short period of 0.4856 d. We used light curves from the Transiting Exoplanet Survey Satellite (Tess), which observed BB Per in five sectors, to determine its photometric properties and a precise orbital ephemeris. The solution of the Tess light curve in PHOEBE results in a detached configuration, where the temperature of the primary component was fixed to T1 = 5 300 K according to LAMOsT, which gives us T2 = 5050 +/- 50 K for the secondary. The spectral type of the primary component was derived as K0 and the photometric mass ratio was estimated q = 0.90. Slow period changes on the current O-C diagram spanning the past 25 years indicate the presence of a third body orbiting the eclipsing pair with an orbital period of about 22 years. The companion could be a red dwarf of spectral type M6-M7 with a minimal mass of about 0.1 M ae. The characteristics and temporal variation of the dark region on the surface of the secondary component were estimated.
ER  -

WOLF, Marek; Petr ZASCHE; Miloslav ZEJDA; Martin MASEK; Andrej MUDRAY; Hana KUČÁKOVÁ; Waldemar OGLOZA; Jaroslav MERC; Jan KARA and Vojtech DIENSTBIER. TESS light curves and period changes in low-mass eclipsing binary BB Persei. \textit{NEW ASTRONOMY}. 2025, vol.~119, October 2025, p.~''102406-1''-''102406-7'', 7 pp. ISSN~1384-1076. Available from: https://doi.org/10.1016/j.newast.2025.102406.

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