- evn2024@mpifr.de
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Contribution
Constraining sub-structures in TeV-emitting gamma-ray blazars with the GMVA
Speakers
- Mr. Jonas HEßDÖRFER
Primary authors
- Mr. Jonas HEßDÖRFER (JMU Würzburg)
Co-authors
- Prof. Matthias KADLER (Universitaet Wuerzburg)
- Alex KRAUS (MPIfR)
- Petra BENKE ()
- Mr. Florian EPPEL (Julius-Maximilians-Universität Würzburg)
- Mr. Florian RÖSCH (Universität Würzburg)
- Luca RICCI ()
- Dr. Rocco LICO (Max Planck Institute for Radio Astronomy (MPIfR))
- Prof. Eduardo ROS ()
- Dr. Daniela DORNER (JMU Würzburg)
- Thomas KRICHBAUM ()
- Prof. Karl MANNHEIM (JMU Würzburg)
- Dr. Roopesh OJHA (NASA)
- Dr. Julian SITAREK (University of Lodz)
- Dr. Marcello GIROLETTI (INAF Istituto di Radioastronomia)
- Prof. Shoko KOYAMA (Niigata University)
Content
Blazars are found to cover a broad range in luminosity and the lowest-luminosity objects turn out to be the ones whose spectral energy distribution extends to the highest energies. In the most extreme blazars their spectral energy distribution can peak at very high gamma-ray energies above 10 TeV. These extremely high peaked BL Lac objects typically are faint radio sources and thus make up a poorly studied source sample, especially at high radio frequencies. Due to their relatively low redshifts, VLBI observations of such sources can achieve very high linear resolution, which makes it possible to constrain limb brightened and/or spine-sheath structures on the smallest accessible scales with the Global Millimetre VLBI Array (GMVA) at 3mm. The GMVA imaging capabilities are of particular importance as such jet sub-structures might explain the origin of the seed photons for high-energy processes. Here, we present first results of the (sub-)parsec-scale jet morphology in a sample of GMVA observed extreme blazars.