[Doctorandos] HOY - 13:30hs - Charla "Signatures of chaos and particle acceleration near magnetised black holes".

[Secretaría de Ciencia y Técnica]

A toda la comunidad,

les recordamos que en el día de hoy, a las 13:30hs en el Salón 
Meridiano, se brindará la charla titulada "Signatures of chaos and 
particle acceleration near magnetised black holes", la cual estará a 
cargo del investigador Vladimir Karas (Astronomical Institute, Czech 
Academy of Sciences, Prague, Czech Republic). El resumen lo pueden leer 
al final de este mensaje.

Atentamente,
Secyt-FCAG

--------
Resumen: The presence of non-thermal radio filaments in the Galactic 
center indicates that supermassive black holes (SMBH) can be embedded in 
ordered magnetic fields of external origin. We will discuss the effects 
of particle acceleration that can be expected to occur very close to the 
event horizon, as the black transits across a magnetic flux tube. 
Magnetic lines of an aligned field help to launch particles in the 
direction approximately parallel to the SMBH rotation axis. Oblique 
magnetic fields lack the axial symmetry and, due to their interplay with 
frame-dragging near a rotating black hole, the magnetic null points 
develop. An induced electric component can then efficiently accelerate
charged particles. Moreover, we see evidence for the onset of chaos in 
the region just above the ergosphere radius.


-- 
Secretaría de Ciencia y Técnica
Facultad de Ciencias Astronómicas y Geofísicas
Horario de atención: lunes a viernes de 8hs a 15hs