Accretion from the Galactic Centre Mini-spiral onto Milky Way's SMBH (speaker: Vladimir Karas, Astronomical Institute, Prague)

Monday, November 30, 12:05pm
Marlar Lounge (37-252)

Evidence for reflection of X-rays on molecular clouds in the vicinity of Sgr A* super-massive black hole (SMBH) suggests that the Milky Way's center was quite active in its recent history. We investigate the idea of the Galactic Centre Mini-spiral as the origin of gaseous material for the enhanced activity of Sgr A*. Collisions between clumps of gas in the Minispiral can reduce their angular momentum and set some of the clumps on a plunging trajectory towards the supermassive black hole. It turns out that the amount of material in the Minispiral region is sufficient to sustain the luminosity of Sgr A* at the required level. We examine a possibility of Thermal Instability onset to describe the mechanism for enhanced accretion during this period.

Talk Host:  TBA


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