Very high energy emission in Active Galactic Nuclei jets.

Speaker: Dra. Sarah Kaufmann
Mesoamerican Centre for Theoretical Physics (MCTP)
Universidad Autónoma de Chiapas (UNACH).

Date and Time

October 20, 2016. 12:00 h.


Sala de Usos Múltiples de la Facultad de Ciencias en Física y Matemáticas (UNACH), Ciudad Universitaria Carretera Emiliano Zapata Km. 8, Real del Bosque (Terán). Tuxtla Gutiérrez, Chiapas, México.




Dra. Karen Salomé Caballero Mora.
Dr. Idrish Huet Hernández.
Dr. Arnulfo Zepeda Domínguez.


Active Galactic Nuclei are luminous, variable objects in the center of a galaxy. The emitted radiation of AGN cover several decades of frequencies. The discovery of very high energy (TeV) gamma-ray emission of BL Lac objects (a class of active galactic nuclei dominated by non-thermal emission) gave new insights into the particle acceleration and the emission processes in the highly relativistic jets. Very high energy emission could be detected in ~5% of the BL Lac objects.

We performed detailed multi wavelength studies over the whole electromagnetic spectrum, which are crucial to study the emission processes in detail. As example, some BL Lac objects with exceptional TeV spectra and different maximum energies in the spectral energy distribution are presented. The basic aim was to study with new, simultaneous multi-wavelength observations in the optical, UV, X-ray, GeV and TeV gamma-ray regime, if the emission processes of these extreme cases of TeV BL Lac objects can be explained by the synchrotron Self-Compton model, which is well established for the class of BL Lac objects at lower energies. During one of this studies, a clear extended non-thermal X-ray jet in AP Librae was detected. This was surprising, since X-ray jets are unusual for TeV emitting BL Lac objects.
UNACH/MCTP, Ciudad Universitaria
Carretera Emiliano Zapata Km. 4,
Real del Bosque (Terán).
Tuxtla Gutiérrez, Chiapas, México.
C. P. 29050
Teléfono 52 (961) 617-80-00
Ext. 8200 y 1380
© 2013 MCTP
Desarrollado por MCTP