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Séminaire du jeudi 14 décembre 2017

Spying on the past activity of our supermassive black hole

Maïca Clavel (IPAG)
Thursday December 14th - 11am
IRAM Seminar Room - IRAM

The supermassive black hole at the center of the Milky Way, Sagittarius A*, is currently one of the least luminous known supermassive black holes. However, X-ray observations carried out over the past decade have provided strong evidence that Sgr A* has experienced periods of higher activity in the past centuries. By tracing the echoes of these past outbursts as they propagate through the Galactic center molecular clouds, we intend to better understand the duty cycle of this supermassive black hole and to identify its past catastrophic events. Yet, reconstructing Sgr A*’s past light curve remains challenging : I will review results and perspectives of this relatively new astro-archeology research field.

Caption : Chandra 6.4 keV emission maps tracing the echoes of Sgr A*’s past outbursts as they propagate away from the black hole (Clavel et al. 2013)


Sous la tutelle de:

tutelles

Sous la tutelle de:

CNRS Université Grenoble Alpes