Seminars

Forthcoming Seminar

Speaker: Dr. Arthur Suvorov, University of Tuebingen

Place: Laboratory of Astronomy, AUTH

Date: Thursday 07-11-2019
Ώρα: 13:00 – 14:00

Abstract

Fast radio bursts (FRBs) are short (duration ~ ms) but 
intense (flux ~ Jy) flashes, generally believed to be of extragalactic 
origin due to their high dispersion measures, which appear in the 
GHz-band. The detection of multiple bursts from certain sources (~200 
in 6 yrs for FRB 121102) indicates that at least a subclass of FRBs 
result from transient outbursts of young, compact objects. We discuss 
some of the statistics surrounding the repeating bursts, and explore 
what this might indicate about the progenitors. We consider the 
possibility that repeating FRBs are energetically sourced by crustal 
fractures in young (~ 100 yrs) magnetars, whose crust 
quasi-periodically yields due to strong, and topologically 
complicated, magnetic stresses, which build up as the field evolves 
due to Hall drift and Ohmic diffusion.

Στην αίθουσα διαλέξεων "Β. Ξανθόπουλος" στο Εργαστήριο Αστρονομίας, ΑΠΘ

Special lectures.

See the video archive of seminars since 2016.

See the 2000-2015 list of previous seminars.