Frequent Optical Flares in an M-type Detached Eclipsing Binary TIC 349005337
Abstract
A comprehensive photometric and spectroscopic analysis of TIC 349005337, a highly active M-type detached eclipsing binary with an orbital period of 2.6079133 days, is presented utilizing high-cadence and long-term monitoring photometry from the Transiting Exoplanet Survey Satellite (TESS) and medium-resolution spectroscopy from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST). By integrating radial velocity curves with light curves, we determined the fundamental physical parameters for both components. The system consists of an M-dwarf primary (M1 = 0.517 ± 0.009 M⊙, R1 = 0.518 ± 0.003 R⊙) and a fully convective secondary (M2 = 0.298 ± 0.004 M⊙, R2 = 0.357 ± 0.003 R⊙). A total of 12 high-energy stellar flares, with the most energetic event reaching 3.87 × 1034 erg, is identified, confirming the system is in a state of magnetic hyper-activity. The frequent superflares suggest that intense magnetic activity and significant starspot coverage play a dominant role in altering the stellar atmospheric structure. As the secondary component falls below the fully convective boundary, these energetic flares provide critical empirical constraints for distributed dynamo models in the low-mass regime. Our results highlight TIC 349005337 as an ideal laboratory for investigating the interplay between binary dynamics, magnetic reconnection, and the resulting impact on the atmospheric stability of potential orbiting exoplanets.
Related
- First and Comprehensive Study of V0757 Pup : γ−Doradus Pulsator in Detached Eclipsing Binary
- UX Men: Detached Eclipsing Binary as a Benchmark Candidate
- UX Men: Detached eclipsing binary as a benchmark candidate
- Precise and Accurate Mass and Radius Measurements of Thirty Galactic Metal-Poor Stars in Detached Eclipsing Binaries
- IPHAS J190812.63+045728.1: A deeply eclipsing, X-ray bright cataclysmic variable with frequent outbursts
BibTeX
@misc{zhou2026frequent,
title = {{Frequent Optical Flares in an M-type Detached Eclipsing Binary TIC 349005337}},
author = {Xiao Zhou and Liying Zhu and Wei Hu and Gil Nachmani and Jia Zhang and Mikhail Yu. Kovalev and Ergang Zhao},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.05881},
eprint = {2611.05881},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.05881},
}
RIS
TY - UNPB
TI - Frequent Optical Flares in an M-type Detached Eclipsing Binary TIC 349005337
AU - Xiao Zhou
AU - Liying Zhu
AU - Wei Hu
AU - Gil Nachmani
AU - Jia Zhang
AU - Mikhail Yu. Kovalev
AU - Ergang Zhao
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.05881
UR - https://arxiv.org/abs/2611.05881
AB - A comprehensive photometric and spectroscopic analysis of TIC 349005337, a highly active M-type detached eclipsing binary with an orbital period of 2.6079133 days, is presented utilizing high-cadence and long-term monitoring photometry from the Transiting Exoplanet Survey Satellite (TESS) and medium-resolution spectroscopy from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST). By integrating radial velocity curves with light curves, we determined the fundamental physical parameters for both components. The system consists of an M-dwarf primary (M_1 = 0.517 ± 0.009 M_⊙, R_1 = 0.518 ± 0.003 R_⊙) and a fully convective secondary (M_2 = 0.298 ± 0.004 M_⊙, R_2 = 0.357 ± 0.003 R_⊙). A total of 12 high-energy stellar flares, with the most energetic event reaching 3.87 × 10^34 erg, is identified, confirming the system is in a state of magnetic hyper-activity. The frequent superflares suggest that intense magnetic activity and significant starspot coverage play a dominant role in altering the stellar atmospheric structure. As the secondary component falls below the fully convective boundary, these energetic flares provide critical empirical constraints for distributed dynamo models in the low-mass regime. Our results highlight TIC 349005337 as an ideal laboratory for investigating the interplay between binary dynamics, magnetic reconnection, and the resulting impact on the atmospheric stability of potential orbiting exoplanets.
ER -