Seminars
Our seminars take place in the library of the Main Building (Praha–Sporilov, see
Contacts).
Scheduled:
26.10.2010 15:00
Devaky Kunneriath
I. Institute of Physics, University of Cologne, Germany
High angular resolution radio interferometry observations of Galactic Centre
Abstract
Devaky Kunneriath
High angular resolution radio interferometry observations of Galactic Centre
High angular resolution radio interferometry observations at high frequencies enable us to study the emission mechanisms of the central region of our Galactic Centre, which harbours the supermassive black hole source Sgr A*, in great detail. This talk will focus on recent results from GC observations with radio interferometer arrays such as CARMA and ATCA. I will present results from the flare modelling of Sgr A* based on our global coordinated multiwavelength observing campaigns in 2007 and 2008, and high resolution maps along with a spectral index analysis of the extended emission of the central minispiral region at multiple wavelengths.
Previous:
29.09.2010 14:30
Giulia Migliori
International School for Advanced Studies (SISSA), Trieste, Italy
A multi-wavelength approach to the study of extragalactic jets: modeling their spectral energy distribution
Abstract
Giulia Migliori
A multi-wavelength approach to the study of extragalactic jets: modeling their spectral energy distribution
The study of extragalactic jets by modeling their spectral energy distribution (SED) has become a powerful approach to investigate jet physics, due to the unprecedented wealth of multi-wavelength data. The broadband fitting allows to infer the main physical parameters of the emitting plasma and estimate the kinetic power carried by the jet.
In the talk, I will first introduce a leptonic synchrotron and inverse Compton model, generalized by taking into account the main local and external radiative fields which can act as seed photons. The model is then applied to investigate two astrophysical cases: 1- the origin the X-ray emission in young and compact radio galaxies; 2- the study of the jet structure in misaligned radio sources detected in the gamma-ray band by Fermi-LAT, focusing in particular on the results obtained for the FRI radio galaxy NGC6251.
We try hard to meet regularly to discuss ongoing research projects and recent astro-ph papers.
If you would like to give a seminar in our group, please contact Vladimir Karas.
Everybody is welcome.
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