[SEMINARI] Recordatori: SEMINAR: Pulsar Wind Termination Shocks

[Enric Marco]

Title: Pulsar Wind Termination Shocks

Speaker:  J.G. Kirk

Institution:  Max Planck Institut fuer Kernphysik, Heidelberg, Alemanya

Where: Seminari del departament d'Astronomia i Astrofisica

Dimarts, 15 abril 2014, 15:30 h.

Resum

Pulsar winds are made up of low density, magnetized, relativistic 
plasmas. When they impact the interstellar medium, they form a shock 
front which accelerates the particles responsible for Pulsar Wind 
Nebulae - the dominant galactic sources of very high energy gamma-rays. 
However, if the shock obeys the standard MHD jump conditions in a 
strongly magnetized plasma, it is not effective at dissipating the wind 
energy into particles. A way out of this problem is possible if the 
magnetic field arriving at the termination shock fluctuates on the 
rotation timescale of the pulsar, as expected in the 'striped wind' 
model. In this case, dissipation is possible either by driven 
reconnection in the compressed downstream plasma, or by conversion of 
the fluctuations into damped superluminal electromagnetic modes. In this 
talk, I will briefly describe the basic ideas behind pulsar wind theory, 
before discussing recent work on the role played by superluminal 
electromagnetic waves, and their possible radiative signatures.

http://celeste.uv.es/daa/seminari.php.UTF8?id=1085

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Dr. Enric Marco
Departament d'Astronomia i Astrofísica
Facultat de Física
Universitat de València
C/  Dr. Moliner, 50
46100 Burjassot, Spain
Phone: (34)-96-354-3069
Fax:(34)-96-354-3084
enric.marco en uv.es
www.uv.es/marco
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