Absolute properties of the neglected eclipsing B-type binary HD 194495 |
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Authors: | Ömür Çak?rl? Ahmet Dervi?o?luEsin Sipahi Cafer ?bano?lu |
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Institution: | Ege University, Science Faculty, Astronomy and Space Sciences Dept., 35100 Bornova, ?zmir, Turkey |
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Abstract: | We present the results of the high-resolution spectroscopic observations of the neglected binary system HD 194495 (B3 IV-V+B4 V). A combined analysis of three different photometric data set (Tycho BT and VT photometry, Hp-band data of Hipparcos and V-band data of ASAS3 photometry) and radial velocities indicates that the system has an orbital period of 4.90494 ± 0.00005 days and an inclination of 69 ± 1 degrees. This solution yields masses and radii of M1 = 7.57 ± 0.08 M⊙ and R1 = 5.82 ± 0.03 R⊙ for the primary and M2 = 5.46 ± 0.09 M⊙ and R2 = 3.14 ± 0.08 R⊙ for the secondary. Based on the position of the two stars plotted on a theoretical H-R diagram, we find that the age of the system is ?28 Myr, according to stellar evolutionary models. The spectroscopic and photometric results are in agreement with those obtained using theoretical predictions. |
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Keywords: | Stars: binaries Eclipsing stars: fundamental parameters Individual method: spectroscopy Stars: HD 194495 |
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