Marek Abramowicz
Theoretical Physics Mechanics, Univ. Göteborg (Göteborg, Suède)
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
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| « The thermal instability of the radiation pressure supported accretion disks » |
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Marek Abramowicz |
| The standard accretion disk theory predicts that if the viscous stress is proportional to the total pressure, then accretion disks with luminosities near the Eddington one are thermally unstable and cannot exist in a stationary state. In the inner parts of such disks the pressure is dominated by the radiation pressure. However, observations seem to point out that such are not destroyed for times longer than the thermal time. I will discuss this contradiction and show that a "retarded heating" suggested recently by Omer Blaes and collaborators may be a way out. |
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vendredi 12 novembre 2010 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |