SIMBAD references

2025PASJ...77...74S - Publ. Astron. Soc. Jap., 77, 74-85 (2025/February-0)

Flare from the secondary star of an extreme period binary.

SHUANG W., RAUL M., HUIYU Y. and YUANGUI Y.

Abstract (from CDS):

Photometric observations were conducted on the short-period and highly active M dwarf BX Tri from 2016 to 2023. From ground-based observations and data from the Transiting Exoplanet Survey Satellite (TESS), a total of 196 sets of light curves were analyzed using Wilson-Devinney (W-D) method. The photometric analyses of BX Tri reveal a semidetached configuration, where the primary star accounts for a minimum of $80\%$ of the total luminosity in this binary system. The magnetic activity cycle of BX Tri was determined to be $9.4\:$yr, as indicated by the variability in spot longitudes. Three flares were detected by TESS. The long-lasting flare$_{1797}$ could originate from a polar region on the secondary star. Given the ongoing flare eruptions, BX Tri has the potential to merge into a single star through mergebursts.

Abstract Copyright: © The Author(s) 2024. Published by Oxford University Press on behalf of the Astronomical Society of Japan.

Journal keyword(s): binaries: close - binaries: eclipsing - stars: individual (BX Trianguli)

Errata: erratum vol. 78, p. 349 (2026)

Simbad objects: 23

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