* Astronomy

Title: Absolute properties of the neglected eclipsing B-type binary HD 194495
Authors: Omür Cakirli, Esin Sipahi, Cafer banoglu

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 B_T and V_T photometry, H_p-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 M_{1} = 7.57 ±0.08 solar masses and R_{1} = 5.82 ±0.03 solar radii for the primary and M_{2} = 5.46 ±0.09 solar masses and R_{2} = 3.14 ±0.08 solar radii 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 \gtrsim 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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