Michal ZajaÄek (Center for Theoretical Physics, PAS, Warsaw)Michal ZajaÄek Colloquium: Speeding up around the Galactic center |
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The Australia Telescope National Facility Colloquium | |||
16:00-17:00 Wed 23 Sep 2020 | |||
Remotely Hosted |
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AbstractThere have been three recent discoveries in the field of the Galactic center that have significant implications for its evolution. First, the discovery of six faint stars by Peissker+2020 that orbit the supermassive black hole (SMBH) at distances comparable to the size of the Solar System provides new, powerful probes of the strong-gravity regime of Sgr A*. Two of these stars, S62 and S4711, have orbital periods less than 10 years and the star S4714 with its estimated peribothron velocity reaching nearly 10% of the light speed is a candidate for the fastest star in the Galaxy up to now.
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