Séminaire / Seminar GReCO |
| « Probing the vicinity of the supermassive black hole SgrA* with near-future instruments » |
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Frederic Vincent |
| The next five years will see the opening of a new era of observation of strong gravitational field phenomena. The infrared interferometer GRAVITY (May 2015) and the sub-millimeter VLBI array Event Horizon Telescope (EHT, 2020) will reach respectively an angular precision of 10µas and an angular resolution of 20µas. Comparing these numbers to the apparent size of SgrA*, 50µas, it is clear that this new generation of instrument will allow investigating the very vicinity of the black hole event horizon. I will show simulations of GRAVITY observations of infrared flares at SgrA* and discuss what these near-future observations will teach us regarding these extreme events. I will also discuss the ability of the future EHT data to constrain the geometry of the magnetic field in the vicinity of SgrA*. |
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lundi 28 avril 2014 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |