Akademik Veri Yönetim Sistemi
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.546, sa.2, 2026 (SCI-Expanded, Scopus)
Open clusters serve as natural laboratories for testing stellar evolution theories as their member stars share a common age, distance, and chemical composition. Within these environments, eclipsing binary (EB) systems are particularly valuable because their masses and radii can be determined with high precision, offering stringent benchmarks for stellar interior models. Such systems become even more powerful probes when combined with asteroseismic constraints, enabling simultaneous tests of fundamental parameters and internal structure. We present the first detailed interior models of the EB system KIC 9777062, a confirmed member of the open cluster NGC 6811, computed with the MESA stellar evolution code. The analysis combines binary dynamics with non-adiabatic delta Sct/gamma Dor pulsation modelling (via GYRE) and adiabatic solar-like oscillations predictions (via ADIPLS) for two independent opacity prescriptions (OPAL A09 and OPAL MB22). The best-fitting models yield M-A = 1.603 +/- 0.016 M-circle dot, R-A = 1.744 +/- 0.004 R-circle dot and M-B = 1.419 +/- 0.009 M-circle dot, R-B = 1.544 +/- 0.003 R-circle dot. The corresponding ages are t(A) = 0.932 +/- 0.230 Gyr and t(B) = 1.089 +/- 0.230 Gyr (A09), and t(A) = 0.867 +/- 0.230 Gyr and t(B) = 1.033 +/- 0.230 Gyr (MB22), consistent with independent asteroseismic estimates for NGC 6811. Although non-adiabatic mode frequencies are only weakly sensitive to the adopted opacity table, large separation (Delta nu) predictions show a stronger dependence, making them a promising diagnostic for future observations. This study demonstrates the power of combining EB dynamics, open cluster constraints, and pulsation modelling to probe the internal physics of intermediate-mass stars, and underli