Date:
Tue, 07/07/201512:30-13:30
Location:
Kaplun building, Room No. 200
Lecturer: Prof. Evgeny Derishev
Affiliation: Institute of Applied Physics,
Nizhny Novgorod, Russia
Abstract:
We present a phenomenological
model for emission from relativistic
shocks. This model works best for
those shocks, where dissipation of
magnetic energy and radiative cooling
of electrons take place on timescales
shorter than the dynamical timescale.
The model predicts that the ratio of
synchrotron to inverse Compton
emissivities is close to unity within the
emitting region and that most of the IC
radiation is absorbed in front of the
shock and serves as a source of
energetic particles at the shock front.
The balance between acceleration and
absorption-injection processes fixes
the typical energy of emitting
electrons, which falls in the right range
to explain GRB emission as
synchrotron radiation from such
shocks. This balancing effect also
implies existence of peak energy -
luminosity relation, which is similar to
the Amati relation.
Additional details of the upcoming Astrophysics'
seminars can be found on the following link.
האירוע הזה כולל שיחת וידאו ב-Google Hangouts.
הצטרף: https://hangouts.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.3l7fklgjaajpvllog5mf6u6isg&hs=121