Analysis of the massive eclipsing binary V1441 Aql

Abstract We present new spectroscopic observations of the early type, double-lined eclipsing binary V1441 Aql. The radial velocities and the available photometric data obtained by ASAS is analysed for deriving the parameters of the components. The components of V1441 Aql are shown to be a B3 IV primary with a mass M p = 8.02 ± 0.51 M ⊙ and radius R p = 7.33 ± 0.19 R ⊙ and a B9 III secondary with a mass M s = 1.92 ± 0.14 M ⊙ and radius R s = 4.22 ± 0.11 R ⊙ . Our analyses show that V1441 Aql is a double-contact system with rapidly rotating components. Based on the position of the components plotted on the theoretical Hertzsprung–Russell diagram, we estimate that the ages of V1441 Aql is about 30 Myr, neglecting the effects of mass exchange between the components. Using the UBVJHK magnitudes and interstellar absorption we estimated the mean distance to the system V1441 Aql as 550 ± 25 pc.