Speaker
Description
In my first talk I present a study of the contributions to the relativistic Fe K α line profile from higher order images (HOIs) produced by strongly deflected rays from the disc which cross the plunging region, located between the innermost stable circular orbit (ISCO) radius and the event horizon of a Kerr black hole.
We investigate the characteristics features imprinted by the HOIs in the line profile for different black hole spins, disc emissivity laws, and inclinations. We find that they extend from the red wing of the profile up to energies slightly lower than those of the blue peak, adding ∼0.4-1.3 per cent to the total line flux. The contribution to the specific flux is often in the ∼1 to 7 per cent range, with the highest values attained for low and negative spin (a ≲ 0.3) black holes surrounded by intermediate inclination angle (i ∼ 40°) discs. The results are applied to observe HOI in Large Area Detecto missions like eXTP.
In my second talk I will introduce the International Space Science Institute in Bern, Switzerland. ISSI is an institute of excellence aiming to serve the different space science communities as an international and multi-disciplinary platform. Everybody can apply with a proposal to one of the ISSI study tools, if approved, ISSI is financially supposing the scientific project to be partially carried out at its premises as a visiting scientist.