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CYG X-1=V1357 CYG investigation based on high-resolution optical spectroscopy of 2002 2004статья
Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
- Авторы: Karitskaya E.A., Agafonov M.I., Bochkarev N.G., Bondar A.V., Galazutdinov G.A., Lee B.C., Musaev F.A., Sapar A.A., Sharova O.I., Shimanskii V.V.
- Журнал: Astronomical and Astrophysical Transactions
- Том: 24
- Номер: 5
- Год издания: 2005
- Издательство: Cambridge Scientific Publishers
- Местоположение издательства: Cambridge
- Первая страница: 383
- Последняя страница: 389
- DOI: 10.1080/10556790500495042
- Аннотация: We report the results of Cyg X-1 spectral monitoring for 2002 2004. A comparison of observed and non-local thermal equilibrium model profiles for H I, He I and Mg II is given, taking into account the tidal distortion of the Cyg X-1 optical component and its illumination by X-ray emission from the secondary component. We set limits on the main characteristics of the optical component, Teff=30400\plusmn500K and log g=3.31\plusmn0.07, and on the overabundances of He and Mg, [He]/[H]=0.43\plusmn0.06 dex and [Mg]/[H]=0.75\plusmn0.15 dex. The Doppler images were reconstructed by an improved Doppler tomography method on the basis of nine He II (?=4686Å) profiles from 2003 (the \lsquosoft\rsquo X-ray state) and six profiles from 2004 (the \lsquohard\rsquo X-ray state). This allowed us to set limits on the black-hole-to-supergiant mass ratio (1/4)=slant MX/MO=slant (1/3).
- Добавил в систему: Бочкарев Николай Геннадиевич