Vème Ecole de Physique des Astroparticules
23 - 28 mai 2016
OHP, Saint Michel l'Observatoire

Physique de l’Univers en rayons X

Accreting supermassive black holes at different accretion rates

Annalisa CELOTTI
International School for Advanced Studies (SISSA)

Cours
The lecture will present at a basic level the main emission processes in different context of X-ray astrophysics, at an interpretational level. Emphasis will be given on the interpretation in specific contexts.

Chapitres
  1. The engine: supermassive black holes and accretion discs
  2. Different accretion rates
  3. The origin of X-ray emission: coronae, reflection, iron lines in AGN
  4. Obscured and unobscured  AGN and the X-ray background
  5. Jetted AGN


Contexte

The “ubiqutous” presence of supermassive black holes in the center of galaxies with very different nuclear radiation output led to the recognition of the presence of a broad range of accretion mass rates which will be outlined. Furthermore the characteristics of the X-ray emission spectrum revealed the possibility to
  1. map the very inner region of the accretion disc and even infer the spinning of the central black hole, in the regime of strong gravity;
  2. study more closely the role of obscuring material in the circumnuclear environment.


 

Retour au Programme