Seminars 2020/2021

19th October 2020

Seminar Poster  

 

Seminar Speaker:

Kenzie Nimmo

Venue:

Online via Zoom
https://astron.zoom.us/j/88545312932 (Meeting ID: 885 4531 2932)
Also streamed in real time via YouTube https://youtu.be/aHLBuDP43gc

Date and Time:          

19th October 2020, 3pm (Irish Time)

Seminar Title:             Pin-pointing the positions of repeating Fast Radio Bursts with the European VLBI Network 

Abstract:
Fast radio bursts (FRBs) are bright pulses of coherent radio emission with durations of only a few milliseconds, and unknown extragalactic origin. Some FRBs have been observed to repeat, whereas others appear as one-off events. Currently it still remains unclear whether all FRB sources have the ability to repeat, or if there are multiple populations with different physical mechanisms. Recently, the Galactic magnetar SGR 1935+2154 emitted a very bright radio burst (orders of magnitude brighter than typical Galactic radio bursts from pulsars/magnetars) unveiling a bridge between Galactic sources of radio bursts and FRBs. With the European VLBI Network (EVN) we can precisely localise FRBs to milli-arcsecond precision, identifying not only the host galaxy, but the region within the host that the bursts are originating from. This will help in understanding the FRB progenitor(s) and how FRBs link to Galactic sources. In addition to the real-time correlation observing mode (e-EVN), baseband data can be buffered to study fine time and frequency structures of the bursts, as well as their polarisation properties. In this talk I will discuss our approach to localising repeating FRBs using the EVN, present the localisation of a second repeater, FRB 180619.J0158+65, and present recent results on SGR 1935+2154.

 

 

Department of Physics

Roinn na Fisice

Room 213, 2nd floor, Dept. of Physics, University College Cork, Ireland,

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