0000000000328927

AUTHOR

C. Grossberger

showing 3 related works from this author

Structural Variability of 3C 111 on Parsec Scales

2012

We discuss the parsec-scale structural variability of the extragalactic jet 3C111 related to a major radio flux density outburst in 2007. The data analyzed were taken within the scope of the MOJAVE, UMRAO, and F-GAMMA programs, which monitor a large sample of the radio brightest compact extragalactic jets with the VLBA, the University of Michigan 26 m, the Effelsberg 100 m, and the IRAM 30m radio telescopes. The analysis of the VLBA data is performed by fitting Gaussian model components in the visibility domain. We associate the ejection of bright features in the radio jet with a major flux-density outburst in 2007. The evolution of these features suggests the formation of a leading compone…

PhysicsJet (fluid)Active galactic nucleusRadio galaxyAstrophysics::High Energy Astrophysical PhenomenaGeneral EngineeringAstronomyAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsGalaxyParsecRadio telescopeVisibilityAstrophysics::Galaxy AstrophysicsRadio astronomyActa Polytechnica
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Structural variability of 3C 111 on parsec scales

2011

We discuss the parsec-scale structural variability of the extragalactic jet 3C 111 related to a major radio flux density outburst in 2007. The data analyzed were taken within the scope of the MOJAVE, UMRAO, and F-GAMMA programs, which monitor a large sample of the radio brightest compact extragalactic jets with the VLBA, the University of Michigan 26 m, the Effelsberg 100 m, and the IRAM 30 m radio telescopes. The analysis of the VLBA data is performed by fitting Gaussian model components in the visibility domain. We associate the ejection of bright features in the radio jet with a major flux-density outburst in 2007. The evolution of these features suggests the formation of a leading compo…

Cosmology and Nongalactic Astrophysics (astro-ph.CO)3C111 – galaxiesAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Instrumentation and Methods for AstrophysicsFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic Astrophysicsactive – galaxieslcsh:TA1-2040galaxiesnucleijets– galaxiesindividuallcsh:Engineering (General). Civil engineering (General)Astrophysics::Galaxy AstrophysicsAstrophysics - Cosmology and Nongalactic Astrophysics
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The EVN view of the highly variable TeV active galaxy IC 310

2015

Very-high-energy $\gamma$-ray observations of the active galaxy IC 310 with the MAGIC telescopes have revealed fast variability with doubling time scales of less than 4.8min. This implies that the emission region in IC 310 is smaller than 20% of the gravitational radius of the central supermassive black hole with a mass of $3\times 10^8 M_\odot$, which poses serious questions on the emission mechanism and classification of this enigmatic object. We report on the first quasi-simultaneous multi-frequency VLBI observations of IC 310 conducted with the EVN. We find a blazar-like one-sided core-jet structure on parsec scales, constraining the inclination angle to be less than $\sim 20^\circ$ but…

High Energy Astrophysical Phenomena (astro-ph.HE)Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaAstrophysics::Galaxy Astrophysics
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