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Lehrstuhl für Astronomie

AG Mannheim · AG Kadler· AG Dröge

AG Kadler - Multiwavelength Astronomy

Prof. Dr. Matthias Kadler, Universität Würzburg




Welcome to the group homepage of 'AG Kadler - Multiwavelength Astronomy'. 


The research group is among others working on studies of black holes and the relativistic plasma jets being ejected from their immediate vicinity. Such jets are observed in both Galactic, stellar-mass black hole systems, and in extragalactic, supermassive black hole system and they dominate the emission of these objects over the whole spectrum from radio to gamma-ray energies. Such jets show fascinating phenomena like (apparent) superluminal motion, intraday variability, and dramatic outbursts. Curiously, this jet-production takes place only in a relatively small fraction of all black-hole systems: the radio-loud objects. How do black holes form jets? How are they collimated and accelerated? How do they interact with the environment of their host galaxies?

In collaboration with colleagues in Bamberg, at the Max-Planck-Institut für Radioastronomie in Bonn, and at institutes all over the world, we are trying to address these and other questions with the help of astronomical observations across the electromagnetic spectrum. We are particularly focusing on radio observations of jets using the special technique of Very Long Baseline Interferometry (VLBI) with the VLBA and the LBA, radio single-dish observations with the Effelsberg 100-m telescope, X-ray observations with XMM-NewtonSuzakuSwift, and INTEGRAL, and gamma-ray observations with Fermi/LAT. Various work is also done in collaboration with the LAT Science Working Group (SWG) on Blazars and other AGN.


Major Projects and Collaborations that we are involved in include:

mojave MOJAVE - Monitoring Of Jets in Active galactic nuclei with VLBA Experiments
tanami TANAMI - Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry
gamma F-GAMMA - FERMI-GST AGN Multi-frequency Monitoring Alliance
fermi Fermi Science Working Group on Blazars and Other AGN
(Image Credit: NASA E/PO, Sonoma State University, Aurore Simonnet)
swift Swift Team
ANTARES Collaboration
km3net KM3NeT Consortium
GLOW Consortium

And here is a selection of the telescopes that we are using (click on the images for a full-resolution view):

effelsberg The Effelsberg 100m Radio Telescope
One of the largest fully steerable antennas in the world, located in Effelsberg (near Bonn, Germany).
(Image: M. Kadler)
vlba The Very Long Baseline Array
Ten 25m antennas combine to form an array 8000 km in size.
(Image courtesy of NRAO/AUI and Earth image courtesy of the SeaWiFS Project NASA/GSFC and ORBIMAGE)
tanami_map The TANAMI Array consisting of the LBA, the DSN 70m and 34m antennas in Tidbinbilla, the IVS antennas TIGO (6m)O'Higgins (9m) andHartebeesthoek (26m).
(Image: M. Kadler & J. Wilms)
glitho The Fermi Gamma Ray Space Telescope
(Image Credit: NASA E/PO, Sonoma State University, Aurore Simonnet)
swift_telescope The Swift optical/UV/X-Ray telescope
(Image: NASA GSFC / Sonoma State University)
xmm_newton XMM-Newton (International Gamma-Ray Astrophysics Laboratory)
(Image: ESA/D. Ducros)
integral INTEGRAL (X-ray Multi-Mirror Mission)
(Image: ESA)
antares_picture ANTARES (Astronomy with a Neutrino Telescope and Abyss environmental RESearch) - Cherenkov detector in the deep Mediterranean Sea, optimised for the detection of muons from high-energy astrophysical neutrinos.
(Image: François Montanet)