Polarization curves of GRB afterglows and jet structures

Details Polarization curves of GRB afterglows and jet structures Polarization curves of GRB afterglows and jet structures

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..312..460r&link_type=abstract

Third Rome Workshop on Gamma-Ray Bursts in the Afterglow Era ASP Conference Series, Volume 312, Proceedings of the conference he

Astronomy and Astrophysics

Astronomy

Scientific paper

It has been recently proposed that current burst and afterglow observations can be accounted for by a top hat jet structure as well as by a more universal structured outflow, in which the energy carried by the flow is maximum at the jet spine, decreasing outwards as a power-law with the off-axis angle. To pin down the GRBs jet structure is important in order to quantify the total energy released by the unknown engine and put constrains on its nature. In this paper we review the most popular GRBs jet structures, focusing on the predicted observed properties that could discriminate between them. In particular the behaviour of linearly polarised emission during the afterglow phase seems very promising, since the degree and temporal dependence are predicted to be very different from model to model. In addition, polarization measurements and detections are accumulating fast enough to lead soon to a comprehension of magnetic field and GRBs jet configurations.

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