ИСТИНА |
Войти в систему Регистрация |
|
ИСТИНА ЦЭМИ РАН |
||
We study a binary system containing a red giant and a MS star which hosts a planetary system. The red giant loses mass by stellar wind without Roche lobe overflow while an accretion disk forms around MS companion. We use the alphadisk model with two different accretion regimes and obtain two different disks: the first is standard accretion alpha-disk, the second provides the condition that the matter capture occurs along entire surface of the disk. The aim is to calculate time of planet type-I migration toward the star, resulting in a planetstar merger. Metzger, Giannios, Spiegel (2012) showed that such processes can lead to a transient with luminosity around $10^{36}$ erg s$^{-1}$, authors investigated single stars only. We calculate time of planet migration in binary system depending on mass of stars, a binary separation, planet mass, a distance to the host star in order to compare it to lifetime of a red giant.