Absolute properties of the neglected eclipsing B-type binary HD 194495

Дата и время публикации : 2011-06-27T10:47:14Z

Авторы публикации и институты :
Ömür Çakirli
Esin Sipahi
Cafer İbanoğlu

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 17 pages, 5 figures, 5 tables; New Astronomy, 2011
Первичная категория: astro-ph.SR

Все категории : astro-ph.SR

Краткий обзор статьи: 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 $pm$ 0.00005 days and an inclination of 69$pm$1 degrees. This solution yields masses and radii of $M_{rm 1}$ = 7.57$pm$0.08 $M_{odot}$ and $R_{rm 1}$ = 5.82$pm$0.03 $R_{odot}$ for the primary and $M_{rm 2}$ = 5.46$pm$0.09 $M_{odot}$ and $R_{rm 2}$ = 3.14$pm$0.08 $R_{odot}$ 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.

Category: Physics