Early Afterglows and GRB Jet Composition

Details Early Afterglows and GRB Jet Composition Early Afterglows and GRB Jet Composition

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20516007z&link_type=abstract

American Astronomical Society Meeting 205, #160.07; Bulletin of the American Astronomical Society, Vol. 36, p.1612

Astronomy and Astrophysics

Astronomy

Scientific paper

GRB early optical afterglows contain rich information about the nature of the fireball jets. In particular, it would serve as an important diagnostic tool for the jet composition, e.g. baryonic component versue Poynting flux component, and the neutron fraction within the baryonic component. We will discuss theoretical predictions of GRB early afterglow lightcurves, including how the upstream magnetization influences both the reverse and forward shock emission, as well as how the neutron component displays distinct signatures in the lightcurves. These predictions will be clearly tested by the Swift mission when abundant early afterglow data become available.

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