TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources
Context. 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 pa...
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Format: | Others |
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EDP Sciences,
2017-10-10T22:29:43Z.
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Online Access: | Get fulltext |
LEADER | 03813 am a22005653u 4500 | ||
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001 | 10858 | ||
042 | |a dc | ||
100 | 1 | 0 | |a Muller, C |e author |
700 | 1 | 0 | |a Kadler, M |e author |
700 | 1 | 0 | |a Ojha, R |e author |
700 | 1 | 0 | |a Schulz, R |e author |
700 | 1 | 0 | |a Trustedt, J |e author |
700 | 1 | 0 | |a Edwards, PG |e author |
700 | 1 | 0 | |a Ros, E |e author |
700 | 1 | 0 | |a Carpenter, B |e author |
700 | 1 | 0 | |a Angioni, R |e author |
700 | 1 | 0 | |a Blanchard, J |e author |
700 | 1 | 0 | |a Bock, M |e author |
700 | 1 | 0 | |a Burd, PR |e author |
700 | 1 | 0 | |a Dorr, M |e author |
700 | 1 | 0 | |a Dutka, MS |e author |
700 | 1 | 0 | |a Eberl, T |e author |
700 | 1 | 0 | |a Gulyaev, S |e author |
700 | 1 | 0 | |a Hase, H |e author |
700 | 1 | 0 | |a Horiuchi, S |e author |
700 | 1 | 0 | |a Katz, U |e author |
700 | 1 | 0 | |a Krauss, F |e author |
700 | 1 | 0 | |a Lovell, JEJ |e author |
700 | 1 | 0 | |a Natusch, T |e author |
700 | 1 | 0 | |a Nesci, R |e author |
700 | 1 | 0 | |a Phillips, C |e author |
700 | 1 | 0 | |a Plotz, C |e author |
700 | 1 | 0 | |a Pursimo, T |e author |
700 | 1 | 0 | |a Quick, JFH |e author |
700 | 1 | 0 | |a Stevens, J |e author |
700 | 1 | 0 | |a Thompson, DJ |e author |
700 | 1 | 0 | |a Tingay, SJ |e author |
700 | 1 | 0 | |a Tzioumis, AK |e author |
700 | 1 | 0 | |a Weston, S |e author |
700 | 1 | 0 | |a Wilms, J |e author |
700 | 1 | 0 | |a Zensus, JA |e author |
245 | 0 | 0 | |a TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources |
260 | |b EDP Sciences, |c 2017-10-10T22:29:43Z. | ||
500 | |a arXiv preprint arXiv:1709.03091. | ||
500 | |a 0004-6361 | ||
520 | |a Context. 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. | ||
540 | |a OpenAccess | ||
650 | 0 | 4 | |a galaxies: active -- galaxies: jets -- galaxies: nuclei -- radio continuum: galaxies - techniques: high angular resolution |
655 | 7 | |a Journal Article | |
856 | |z Get fulltext |u http://hdl.handle.net/10292/10858 |