TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry - II. Additional Sources
Access Status
Authors
Date
2018Type
Metadata
Show full item recordCitation
Source Title
School
Remarks
Reproduced with permission from Astronomy & Astrophysics, © ESO
Collection
Abstract
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-simultaneous Fermi/LAT gamma-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. Our observations yield the first images of many jets below -30deg declination at milliarcsecond resolution. We find that gamma-ray loud TANAMI sources tend to be more compact on parsec-scales and have higher core brightness temperatures than gamma-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 gamma-ray brightest AGN in the TANAMI sky show only a weak positional agreement with high-energy neutrinos demonstrating that the >100TeV IceCube signal is not simply dominated by a small number of the $\gamma$-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.
Related items
Showing items related by title, author, creator and subject.
-
Ojha, R.; Kadler, M.; Böck, M.; Booth, R.; Dutka, M.; Tingay, Steven (2010)Context. A number of theoretical models vie to explain the γ-ray emission from active galactic nuclei (AGN). This was a key discovery of EGRET. With its broader energy coverage, higher resolution, wider field of view and ...
-
Abdo, A.; Ackermann, M.; Ajello, M.; Atwood, W.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Baring, M.; Bastieri, D.; Baughman, B.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Blandford, R.; Bloom, E.; Bonamente, E.; Borgland, A.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Burnett, T.; Buson, S.; Caliandro, G.; Cameron, R.; Camilo, F.; Caraveo, P.; Casandjian, J.; Cecchi, C.; Celik, O.; Charles, E.; Chekhtman, A.; Cheung, C.; Chiang, J.; Ciprini, S.; Claus, R.; Cognard, I.; Cohen-Tanugi, J.; Cominsky, L.; Conrad, J.; Corbet, R.; Cutini, S.; den Hartog, P.; Dermer, C.; de Angelis, A.; De Luca, A.; de Palma, F.; Digel, S.; Dormody, M.; Do Couto e Silva, E.; Drell, P.; Dubois, R.; Dumora, D.; Espinoza, C.; Farnier, C.; Favuzzi, C.; Fegan, S.; Ferrara, E.; Focke, W.; Fortin, P.; Frailis, M.; Freire, P.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Germani, S.; Giavitto, G.; Giebels, B.; Giglietto, N.; Giommi, P.; Giordano, F.; Glanzman, T.; Godfrey, G.; Gotthelf, E.; Grenier, I.; Grondin, M.; Grove, J.; Guillemot, L.; Guiriec, S.; Gwon, C.; Hanabata, Y.; Harding, A.; Hayashida, M.; Hays, E.; Hughes, R.; Jackson, M.; Johannesson, G.; Johnson, A.; Johnson, R.; Johnson, T.; Johnson, W.; johnston, S.; Kamae, T.; Kanbach, G.; Kaspi, V.; Katagiri, H.; Kataoka, J.; Kawai, N.; Kerr, M.; Knödlseder, J.; Kocian, M.; Kramer, M.; Kuss, M.; Lande, J.; Latronico, L.; Lemoine-Goumard, M.; Livingstone, M.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M.; Lubrano, P.; Lyne, A.; Madejski, G.; Makeev, A.; Manchester, R.; Marelli, M.; Mazziotta, M.; McConville, W.; McEnery, J.; McGlynn, S.; Meurer, C.; Michelson, P.; Mineo, T.; Mitthumsiri, W.; Mizuno, T.; Moiseev, A.; Monte, C.; Monzani, M.; Morselli, A.; Moskalenko, I.; Murgia, S.; Nakamori, T.; Nolan, P.; Norris, J.; Noutsos, A.; Nuss, E.; Ohsugi, T.; Omodei, N.; Orlando, E.; Ormes, J.; Ozaki, M.; Paneque, D.; Panetta, J.; Parent, D.; Pelassa, V.; Pepe, M.; Pesce-Rollins, M.; Piron, F.; Porter, T.; Raino, S.; Rando, R.; Ransom, S.; Ray, P.; Razzano, M.; Rea, N.; Reimer, A.; Reimer, O.; Reposeur, T.; Ritz, S.; Rodriguez, A.; Romani, R.; Roth, M.; Ryde, F.; Sadrozinski, H.; Sanchez, D.; Sander, A.; Saz Parkinson, P.; Scargle, J.; Schalk, T.; Sellerholm, A.; Sgro, C.; Siskind, E.; Smith, D.; Smith, P.; Spandre, G.; Spinelli, P.; Stappers, B.; Starck, J.; Striani, E.; Strickman, M.; Strong, A.; Suson, D.; Tajima, H.; Takahashi, H.; Takahashi, T.; Tanaka, T.; Thayer, J.; Thayer, J.; Theureau, G.; Thompson, D.; Thorsett, S.; Tibaldo, L.; Tibolla, Omar; Torres, D.; Tosti, G.; Tramacere, A.; Uchiyama, Y.; Usher, T.; Van Etten, A.; Vasileiou, V.; Venter, C.; Vilchez, N.; Vitale, V.; Waite, A.; Wang, P.; Wang, N.; Watters, K.; Weltevrede, P.; Winer, B.; Wood, K.; Ylinen, T.; Ziegler, M. (2010)The dramatic increase in the number of known gamma-ray pulsars since the launch of the Fermi Gamma-ray Space Telescope (formerly GLAST) offers the first opportunity to study a sizable population of these high-energy ...
-
Giroletti, M.; Massaro, F.; D'Abrusco, R.; Lico, R.; Burlon, D.; Hurley-Walker, Natasha; Johnston-Hollitt, M.; Morgan, J.; Pavlidou, V.; Bell, M.; Bernardi, G.; Bhat, Ramesh; Bowman, J.; Briggs, F.; Cappallo, R.; Corey, B.; Deshpande, A.; Ewall-Rice, A.; Emrich, David; Gaensler, B.; Goeke, R.; Greenhill, L.; Hazelton, B.; Hindson, L.; Kaplan, D.; Kasper, J.; Kratzenberg, E.; Feng, L.; Jacobs, D.; Kudryavtseva, N.; Lenc, E.; Lonsdale, C.; Lynch, Mervyn; McKinley, B.; McWhirter, S.; Mitchell, D.; Morales, M.; Morgan, E.; Oberoi, D.; Offringa, A.; Ord, S.; Pindor, B.; Prabu, T.; Procopio, P.; Riding, J.; Rogers, A.; Roshi, A.; Udaya Shankar, N.; Srivani, K.; Subrahmanyan, R.; Tingay, Steven; Waterson, M.; Wayth, Randall; Webster, R.; Whitney, A.; Williams, A.; Williams, C. (2016)© ESO 2016. Context. Low-frequency radio arrays are opening a new window for the study of the sky, both to study new phenomena and to better characterize known source classes. Being flat-spectrum sources, blazars are so ...