BSN. VIII. Detailed Photometric Modeling of Ten W UMa Contact Binaries and a Revised Empirical Period–Mass Relationship
Publications of the Astronomical Society of the Pacific, cilt.138, sa.9, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 138 Sayı: 9
- Basım Tarihi: 2026
- Doi Numarası: 10.1088/1538-3873/aea18c
- Dergi Adı: Publications of the Astronomical Society of the Pacific
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC, Academic Search Ultimate (EBSCO)
- Anahtar Kelimeler: Eclipsing binary stars (434), Fundamental parameters of stars (555), Stellar evolution (1599)
- Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet
Özet
This study continues our ongoing research on contact binary systems by presenting a detailed analysis of 10 targets. Ground-based observations from six different observatories were conducted and used together with TESS data for the analysis process. Photometric data from our observations were reduced with the recently developed AutoWISP pipeline, yielding high-quality light curves with reliable precision for analysis. An investigation of orbital period variations identifies long-term trends in six of the ten analyzed binaries, including three that also display cyclic variations. Four targets show essentially constant orbital periods. The secular trends are attributed to mass transfer. The cyclic modulations in three systems are caused by either magnetic activity cycles or the Light-Travel Time Effect (LTTE) of a third body, while that in the remaining system is solely due to the LTTE. The BSN application was used to model the photometric light curves of the 10 target binaries. Iterative fitting and MCMC refinement provided robust estimates of the system parameters, while starspot modeling was applied for systems showing O’Connell-effect asymmetries. We refine the empirical orbital period–mass relationship for short-period contact binaries by analyzing a homogeneous data set of systems and deriving an updated primary-mass calibration based on the spectroscopic subset. Using this calibrated relation, the fundamental parameters of the studied systems were subsequently estimated.