Jun 12 – 16, 2023
Asia/Yerevan timezone

Supermassive PeVatron at the Galactic centre

Jun 14, 2023, 4:15 PM
15m

Speaker

Dr Arman Tursunov (Silesian University in Opava and Max Planck Institute for Radio Astronomy)

Description

A compact supermassive source SgrA located at the center of our Galaxy has been observed at different wavelengths across the electromagnetic spectrum. It is the closest and largest in projection supermassive black hole candidate. At the same time, its particle acceleration capability related to the cosmic ray and neutrino messengers were not yet experimentally probed despite indirect indications of the existence of a PeVatron at the Galactic centre. In this talk, I will present a novel scenario of particle acceleration at the Galactic centre involving electromagnetic extraction of rotational energy from the central black hole. Modeling the black hole magnetosphere with the multiwavelength flaring activity of SgrA, I will show that the maximum energy of accelerated protons may reach a few PeV at the source, contributing thus to the knee of the observed cosmic ray spectrum at the Earth's surface.

Primary author

Dr Arman Tursunov (Silesian University in Opava and Max Planck Institute for Radio Astronomy)

Co-authors

Martin Kološ (Institute of Physics, Silesian University in Opava) Zdenek Stuchlik (Silesian University in Opava)

Presentation materials

There are no materials yet.