0000000001317111

AUTHOR

R. Angioni

showing 3 related works from this author

Extended X-ray emission in PKS 1718-649

2018

PKS 1718$-$649 is one of the closest and most comprehensively studied candidates of a young active galactic nucleus (AGN) that is still embedded in its optical host galaxy. The compact radio structure, with a maximal extent of a few parsecs, makes it a member of the group of compact symmetric objects (CSO). Its environment imposes a turnover of the radio synchrotron spectrum towards lower frequencies, also classifying PKS 1718$-$649 as gigahertz-peaked radio spectrum (GPS) source. Its close proximity has allowed the first detection of extended X-ray emission in a GPS/CSO source with Chandra that is for the most part unrelated to nuclear feedback. However, not much is known about the nature …

Active galactic nucleusAstrophysics::High Energy Astrophysical PhenomenaAstronomyFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesRadio spectrumlaw.inventionlawIonization0103 physical sciences010303 astronomy & astrophysicsGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)Astrophysics::Galaxy AstrophysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Physics010308 nuclear & particles physicsStar formationAntenna apertureAstronomy and AstrophysicsAstrophysics - Astrophysics of GalaxiesSynchrotronGalaxySupernovaSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)Astrophysics - High Energy Astrophysical PhenomenaAstronomy & Astrophysics
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TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources

2018

TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of -30deg declination including high-resolution Very Long Baseline Interferometry (VLBI) imaging, radio, optical/UV, X-ray and gamma-ray studies. We have previously published first-epoch 8.4GHz VLBI images of the parsec-scale structure of the initial sample. In this paper, we present images of 39 additional sources. The full sample comprises most of the radio- and gamma-ray brightest AGN in the southern quarter of the sky, overlapping with the region from which high-energy (>100TeV) neutrino events have been found. We characterize the parsec-scale radio properties of the jets and compare with the quasi-simu…

PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Active galactic nucleus010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstronomy and AstrophysicsContext (language use)AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesRadio telescopeNeutrino detector13. Climate actionSpace and Planetary Science0103 physical sciencesVery-long-baseline interferometryNeutrinoBlazarAstrophysics - High Energy Astrophysical Phenomena010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsFermi Gamma-ray Space Telescope
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TANAMI II. Additional sources

2018

TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of -30{deg} declination including high-resolution Very Long Baseline Interferometry (VLBI) imaging, radio, optical/UV, X-ray and {gamma}-ray studies. We have previously published first-epoch 8.4GHz VLBI images of the parsec-scale structure of the initial sample. In this paper, we present images of 39 additional sources. The full sample comprises most of the radio- and {gamma}-ray brightest AGN in the southern quarter of the sky, overlapping with the region from which high-energy (>100TeV) neutrino events have been found. We characterize the parsec-scale radio properties of the jets and compare with the quasi-s…

observational astronomyActive galactic nucleigalactic and extragalactic astronomyAstrophysics and Astronomyhigh energy astrophysicsAstrophysics::High Energy Astrophysical PhenomenaPhysicsAstrophysics::Instrumentation and Methods for AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsNatural SciencesAstrophysics::Galaxy AstrophysicsVery long baseline interferometry
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