TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry⋆

Simple item page
dc.contributor.authorMüller, C.
dc.contributor.authorKadler, M.
dc.contributor.authorOjha, R.
dc.contributor.authorSchulz, R.
dc.contributor.authorTrüstedt, J.
dc.contributor.authorEdwards, P. G.
dc.contributor.authorRos, E.
dc.contributor.authorCarpenter, B.
dc.contributor.authorAngioni, R.
dc.contributor.authorBlanchard, J.
dc.contributor.authorBöck, M.
dc.contributor.authorBurd, P. R.
dc.contributor.authorDörr, M.
dc.contributor.authorDutka, M. S.
dc.contributor.authorEberl, T.
dc.contributor.authorGulyaev, S.
dc.contributor.authorHase, H.
dc.contributor.authorHoriuchi, S.
dc.contributor.authorKatz, U.
dc.contributor.authorKrauß, F.
dc.contributor.authorLovell, J. E. J.
dc.contributor.authorNatusch, T.
dc.contributor.authorNesci, R.
dc.contributor.authorPhillips, C.
dc.contributor.authorPlötz, C.
dc.contributor.authorPursimo, T.
dc.contributor.authorQuick, J. F. H.
dc.contributor.authorStevens, J.
dc.contributor.authorThompson, D. J.
dc.contributor.authorTingay, S. J.
dc.contributor.authorTzioumis, A. K.
dc.contributor.authorWeston, S.
dc.contributor.authorWilms, J.
dc.contributor.authorZensus, J. A.
dc.date.accessioned2020-05-01T14:30:05Z
dc.date.available2020-05-01T14:30:05Z
dc.date.issued2018-02-07
dc.description.abstractContext. TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of − 30° declination including high-resolution very long baseline interferometry (VLBI) imaging, radio, optical/UV, X-ray, and γ-ray studies. We have previously published first-epoch8.4 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 them 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 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.en_US
dc.description.sponsorshipWe thank the anonymous referee and B. Boccardi for helpful comments that improved the manuscript. The Long Baseline Array is part of the Australia Telescope National Facility which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. This study made use of data collected through the AuScope initiative. AuScope Ltd is funded under the National Collaborative Research Infrastructure Strategy (NCRIS), an Australian Commonwealth Government Programme. This work made use of the Swinburne University of Technology software correlator, developed as part of the Australian Major National Research Facilities Programme. This work was supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian Government and the Government of Western Australia. Hartebeesthoek Radio Astronomy Observatory (HartRAO) is a facility of the National Research Foundation (NRF) of South Africa. C.M. acknowledges support from the Studienstiftung des Deutschen Volkes and the ERC Synergy Grant “BlackHoleCam: Imaging the Event Horizon of Black Holes” (Grant 610058). F.K. acknowledges funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 653477. E.R. acknowledges support from the Spanish MINECO through grants AYA2012-38491-C02-01 and AYA2015-63939-C2-2-P and from the Generalitat Valenciana grant PROMETEOII/2014/057. This research was funded in part by NASA through Fermi Guest Investigator grants NNH10ZDA001N, NNH12ZDA001N, and NNH13ZDA001N-FERMI (proposal numbers 41213, 61089, and 71326, respectively). This research was supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by Oak Ridge Associated Universities through a contract with NASA. This research has made use of the United States Naval Observatory (USNO) Radio Reference Frame Image Database (RRFID). This research has made use of NASA’s Astrophysics Data System. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research has made use of the SIMBAD database (operated at CDS, Strasbourg, France). This research has made use of a collection of ISIS scripts provided by the Dr. Karl Remeis-Observatory, Bamberg, Germany at http://www.sternwarte.uni-erlangen.de/isis/ and of Astropy, a communitydeveloped core Python package for Astronomy (Astropy Collaboration,2013).en_US
dc.description.urihttps://www.aanda.org/articles/aa/abs/2018/02/aa31455-17/aa31455-17.htmlen_US
dc.format.extent18 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2vamv-pmeh
dc.identifier.citationTANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional sources C. Müller, M. Kadler, R. Ojha, R. Schulz, J. Trüstedt, P. G. Edwards, E. Ros, B. Carpenter, R. Angioni, J. Blanchard, M. Böck, P. R. Burd, M. Dörr, M. S. Dutka, T. Eberl, S. Gulyaev, H. Hase, S. Horiuchi, U. Katz, F. Krauß, J. E. J. Lovell, T. Natusch, R. Nesci, C. Phillips, C. Plötz, T. Pursimo, J. F. H. Quick, J. Stevens, D. J. Thompson, S. J. Tingay, A. K. Tzioumis, S. Weston, J. Wilms and J. A. Zensus A&A, 610 (2018) A1 DOI: https://doi.org/10.1051/0004-6361/201731455en_US
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201731455
dc.identifier.urihttp://hdl.handle.net/11603/18398
dc.identifier.urihttp://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=2018A%26A...610A...1M
dc.identifier.urihttps://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Search&refcode=2018A%26A...610A...1M
dc.identifier.urihttp://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/A+A/610/A1
dc.language.isoen_USen_US
dc.publisherEDP sciencesen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rights© ESO 2018
dc.titleTANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry⋆en_US
dc.typeTexten_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
aa31455-17.pdf
Size:
1.32 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.56 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

UMBC Physics Department
UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection