Two newly identified eclipsing binaries in open cluster NGC 3532

ABSTRACT We present light-curve analyses of two newly identified detached eclipsing binaries, namely HD 96609 and 303734, in the region richly populated open cluster NGC 3532. is composed main sequence stars (B9-A0V + A2V) with masses radii M1 = 2.66 ± 0.02 M⊙, M2 1.84 0.01 R1 2.740 0.006 R⊙, R2 1.697 0.005 R⊙. The positions components on logM − logR plane suggest log(age/yr) 8.55, corresponding 350 40 Myr age, which agrees 300 100 age 3532 estimated previous studies. find distance as 460 17 pc, consistent $484^{+35}_{-30}$ pc 3532, from Gaia parallaxes. 303734 an interesting totally binary a quite shallow secondary eclipse. Using photometric properties system conjunction theoretical calibrations, we estimate that consists A6V K3V components. are second third binaries discovered after first one, GV Car.