28 August 2022 to 1 September 2022
Politecnico di Milano - Polo territoriale di Lecco
Europe/Rome timezone

Radio Polarimetry of GRB Afterglows

1 Sept 2022, 16:40
30m
Politecnico di Milano - Polo territoriale di Lecco

Politecnico di Milano - Polo territoriale di Lecco

Politecnico di Milano - Polo territoriale di Lecco Via Previati 1/c – 23900 Lecco, Italy

Speaker

Tanmoy Laskar (Radboud University)

Description

As the most energetic explosions in the Universe, relativistic astrophysical transients such as Gamma-ray Bursts (GRBs) provide a unique opportunity to explore physics at extreme energy scales that are otherwise impossible to investigate in Earth-bound laboratories. I will demonstrate the power of radio polarimetric observations, combined with theoretical modeling, in teasing apart the physics of these energetic explosions. I will review the status of radio polarimetric observations of GRB afterglows, and present the first discovery of polarized radio emission with the radio afterglow of GRB 190114C. I will describe how ALMA's unparalleled sensitivity for photometric and polarimetric observations is leading to new insights into the structure, composition, and magnetization of GRB jets. I will conclude by highlighting the current and future role of mm-band polarimetry in the ongoing multi-messenger revolution in extragalactic time-domain astrophysics.

Primary author

Tanmoy Laskar (Radboud University)

Co-authors

Ramandeep Gill Jonathan Granot (Open University of Israel) Kate D. Alexander (Northwestern University) Prof. Edo Berger (Harvard University) Prof. C. G. Mundell (University of Bath)

Presentation materials

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