TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources

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aut.relation.journalAstronomy and Astrophysicsen_NZ
aut.researcherWeston, Stuart
dc.contributor.authorMuller, Cen_NZ
dc.contributor.authorKadler, Men_NZ
dc.contributor.authorOjha, Ren_NZ
dc.contributor.authorSchulz, Ren_NZ
dc.contributor.authorTrustedt, Jen_NZ
dc.contributor.authorEdwards, PGen_NZ
dc.contributor.authorRos, Een_NZ
dc.contributor.authorCarpenter, Ben_NZ
dc.contributor.authorAngioni, Ren_NZ
dc.contributor.authorBlanchard, Jen_NZ
dc.contributor.authorBock, Men_NZ
dc.contributor.authorBurd, PRen_NZ
dc.contributor.authorDorr, Men_NZ
dc.contributor.authorDutka, MSen_NZ
dc.contributor.authorEberl, Ten_NZ
dc.contributor.authorGulyaev, Sen_NZ
dc.contributor.authorHase, Hen_NZ
dc.contributor.authorHoriuchi, Sen_NZ
dc.contributor.authorKatz, Uen_NZ
dc.contributor.authorKrauss, Fen_NZ
dc.contributor.authorLovell, JEJen_NZ
dc.contributor.authorNatusch, Ten_NZ
dc.contributor.authorNesci, Ren_NZ
dc.contributor.authorPhillips, Cen_NZ
dc.contributor.authorPlotz, Cen_NZ
dc.contributor.authorPursimo, Ten_NZ
dc.contributor.authorQuick, JFHen_NZ
dc.contributor.authorStevens, Jen_NZ
dc.contributor.authorThompson, DJen_NZ
dc.contributor.authorTingay, SJen_NZ
dc.contributor.authorTzioumis, AKen_NZ
dc.contributor.authorWeston, Sen_NZ
dc.contributor.authorWilms, Jen_NZ
dc.contributor.authorZensus, JAen_NZ
dc.date.accessioned2017-10-10T22:29:43Z
dc.date.available2017-10-10T22:29:43Z
dc.date.copyright2017-09-10en_NZ
dc.date.issued2017-09-10en_NZ
dc.description.abstractContext. TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of −30◦ declination including highresolution Very Long Baseline Interferometry (VLBI) imaging, radio, optical/UV, X-ray and γ-ray studies. We have previously published first-epoch 8.4 GHz 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 γ-ray brightest AGN in the southern quarter of the sky, overlapping with the region from which high-energy (> 100 TeV) neutrino events have been found. Aims. We characterize the parsec-scale radio properties of the jets and compare with the quasi-simultaneous Fermi/LAT γ-ray data. Furthermore, we study the jet properties of sources which are in positional coincidence with high-energy neutrino events as compared to the full sample. We test the positional agreement of high-energy neutrino events with various AGN samples. Methods. TANAMI VLBI observations at 8.4 GHz are made with Southern-Hemisphere radio telescopes located in Australia, Antarctica, Chile, New Zealand, and South Africa. Results. Our observations yield the first images of many jets below −30◦ declination at milliarcsecond resolution. We find that γ-ray loud TANAMI sources tend to be more compact on parsec-scales and have higher core brightness temperatures than γ-ray faint jets, indicating higher Doppler factors. No significant structural difference is found between sources in positional coincidence with high-energy neutrino events and other TANAMI jets. The 22 γ-ray brightest AGN in the TANAMI sky show only a weak positional agreement with high-energy neutrinos demonstrating that the > 100 TeV IceCube signal is not simply dominated by a small number of the γ-ray brightest blazars. Instead, a larger number of sources have to contribute to the signal with each individual source having only a small Poisson probability for producing an event in multi-year integrations of current neutrino detectors.
dc.identifier.citationarXiv preprint arXiv:1709.03091.
dc.identifier.issn0004-6361en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/10858
dc.publisherEDP Sciencesen_NZ
dc.relation.urihttp://arxiv.org/abs/1709.03091en_NZ
dc.rightsarXiv.org Open access to e-prints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance, Statistics, Electrical Engineering and Systems Science, and Economics
dc.rights.accessrightsOpenAccessen_NZ
dc.subjectgalaxies: active -– galaxies: jets -– galaxies: nuclei -– radio continuum: galaxies – techniques: high angular resolution
dc.titleTANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sourcesen_NZ
dc.typeJournal Article
pubs.elements-id311116
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Design & Creative Technologies
pubs.organisational-data/AUT/Design & Creative Technologies/Engineering, Computer & Mathematical Sciences
pubs.organisational-data/AUT/Design & Creative Technologies/Engineering, Computer & Mathematical Sciences/ISASR
pubs.organisational-data/AUT/PBRF
pubs.organisational-data/AUT/PBRF/PBRF Design and Creative Technologies
pubs.organisational-data/AUT/PBRF/PBRF Design and Creative Technologies/PBRF ECMS
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