[SEMINARI] High resolution studies of AGN: CTA102 and others,
Christian M. Fromm
Enric Marco
Enric.Marco en uv.es
Lun Feb 22 14:35:49 CET 2010
High resolution studies of AGN: CTA102 and others
Christian M. Fromm
Max-Planck-Institut fuer Radioastronomie, Bonn, Alemanya
Seminari del Departament d'Astronomia i Astrofisica
Dimecres 03 març 2010
Hora: 15:00
Resum
Important information can be obtained from radio observations of active
galactic nuclei (AGN), including single-dish light-curve analysis and
multi-frequency very-long-baseline interferometry (VLBI) observations.
We will present our study of the historical 2006 radio flare in the
radio source CTA 102, where the shock-in-jet model and the hypothesis of
an over-pressured jet during this flare were tested. For our analysis,
we used single-dish observations as well as three multi-frequency VLBI
observations. From the light curve analysis we identify the three
different radiation loss stages, where the synchrotron stages shows a
unexpected double peak structure. The evolution of the spectral
parameters along the jet during the flaring event are extracted from
VLBI observations and confirm our assumed model. The double peak
structure can be explained by a change in the viewing angle and leads to
a Doppler boosting of the flux densities around 2006.1. Prospectives of
numerical simulations and studies on another sources will be presented
as well.
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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
http://www.uv.es/marco
http://www.uv.es/aulaastronomia
http://www.uv.es/daa
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