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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00618794" target="_blank" >RIV/68378271:_____/25:00618794 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10510257 RIV/00216224:14310/25:00142765 RIV/47813059:19630/25:A0000474
Result on the web
<a href="https://doi.org/10.1016/j.newast.2025.102406" target="_blank" >https://doi.org/10.1016/j.newast.2025.102406</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.newast.2025.102406" target="_blank" >10.1016/j.newast.2025.102406</a>

Result language
angličtina
Original language name
TESS light curves and period changes in low-mass eclipsing binary BB Persei
Original language description
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 K according to Lamost, which gives us K for the secondary. The spectral type of the primary component was derived as K0 and the photometric mass ratio was estimated. 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. The characteristics and temporal variation of the dark region on the surface of the secondary component were estimated.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/GN24-10608O" target="_blank" >GN24-10608O: Probing the populations of symbiotic stars and related red giant binaries</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)