Related papers: IceCube's convex all-sky neutrino spectrum consist…

Neutrinos and gamma rays from Seyfert galaxies constrain the properties of coronal turbulence

The TeV neutrino signal observed by IceCube from the active galactic nucleus (AGN) NGC 1068 can probe its innermost coronal regions. If these neutrinos originate from hadrons accelerated within a magnetized turbulent corona, their intensity…

High Energy Astrophysical Phenomena · Physics 2026-03-20 Federico Testagrossa , Damiano F. G. Fiorillo , Luca Comisso , Enrico Peretti , Maria Petropoulou , Lorenzo Sironi

IceCube Search for Neutrino Emission from X-ray Bright Seyfert Galaxies

The recent IceCube detection of TeV neutrino emission from the nearby active galaxy NGC 1068 suggests that active galactic nuclei (AGN) could make a sizable contribution to the diffuse flux of astrophysical neutrinos. The absence of TeV…

High Energy Astrophysical Phenomena · Physics 2024-06-13 R. Abbasi , M. Ackermann , J. Adams , S. K. Agarwalla , J. A. Aguilar , M. Ahlers , J. M. Alameddine , N. M. Amin , K. Andeen , C. Argüelles , Y. Ashida , S. Athanasiadou , L. Ausborm , S. N. Axani , X. Bai , A. Balagopal V. , M. Baricevic , S. W. Barwick , S. Bash , V. Basu , R. Bay , J. J. Beatty , J. Becker Tjus , J. Beise , C. Bellenghi , C. Benning , S. BenZvi , D. Berley , E. Bernardini , D. Z. Besson , E. Blaufuss , L. Bloom , S. Blot , F. Bontempo , J. Y. Book Motzkin , C. Boscolo Meneguolo , S. Böser , O. Botner , J. Böttcher , J. Braun , B. Brinson , J. Brostean-Kaiser , L. Brusa , R. T. Burley , D. Butterfield , M. A. Campana , I. Caracas , K. Carloni , J. Carpio , S. Chattopadhyay , N. Chau , Z. Chen , D. Chirkin , S. Choi , B. A. Clark , A. Coleman , G. H. Collin , A. Connolly , J. M. Conrad , P. Coppin , R. Corley , P. Correa , D. F. Cowen , P. Dave , C. De Clercq , J. J. DeLaunay , D. Delgado , S. Deng , A. Desai , P. Desiati , K. D. de Vries , G. de Wasseige , T. DeYoung , A. Diaz , J. C. Díaz-Vélez , P. Dierichs , M. Dittmer , A. Domi , L. Draper , H. Dujmovic , K. Dutta , M. A. DuVernois , T. Ehrhardt , L. Eidenschink , A. Eimer , P. Eller , E. Ellinger , S. El Mentawi , D. Elsässer , R. Engel , H. Erpenbeck , J. Evans , P. A. Evenson , K. L. Fan , K. Fang , K. Farrag , A. R. Fazely , A. Fedynitch , N. Feigl , S. Fiedlschuster , C. Finley , L. Fischer , D. Fox , A. Franckowiak , S. Fukami , P. Fürst , J. Gallagher , E. Ganster , A. Garcia , M. Garcia , G. Garg , E. Genton , L. Gerhardt , A. Ghadimi , C. Girard-Carillo , C. Glaser , T. Glauch , T. Glüsenkamp , J. G. Gonzalez , S. Goswami , A. Granados , D. Grant , S. J. Gray , O. Gries , S. Griffin , S. Griswold , K. M. Groth , C. Günther , P. Gutjahr , C. Ha , C. Haack , A. Hallgren , L. Halve , F. Halzen , H. Hamdaoui , M. Ha Minh , M. Handt , K. Hanson , J. Hardin , A. A. Harnisch , P. Hatch , A. Haungs , J. Häußler , K. Helbing , J. Hellrung , J. Hermannsgabner , L. Heuermann , N. Heyer , S. Hickford , A. Hidvegi , C. Hill , G. C. Hill , K. D. Hoffman , S. Hori , K. Hoshina , M. Hostert , W. Hou , T. Huber , K. Hultqvist , M. Hünnefeld , R. Hussain , K. Hymon , A. Ishihara , W. Iwakiri , M. Jacquart , O. Janik , M. Jansson , G. S. Japaridze , M. Jeong , M. Jin , B. J. P. Jones , N. Kamp , D. Kang , W. Kang , X. Kang , A. Kappes , D. Kappesser , L. Kardum , T. Karg , M. Karl , A. Karle , A. Katil , U. Katz , M. Kauer , J. L. Kelley , M. Khanal , A. Khatee Zathul , A. Kheirandish , J. Kiryluk , S. R. Klein , A. Kochocki , R. Koirala , H. Kolanoski , T. Kontrimas , L. Köpke , C. Kopper , D. J. Koskinen , P. Koundal , M. Kovacevich , M. Kowalski , T. Kozynets , J. Krishnamoorthi , K. Kruiswijk , E. Krupczak , A. Kumar , E. Kun , N. Kurahashi , N. Lad , C. Lagunas Gualda , M. Lamoureux , M. J. Larson , S. Latseva , F. Lauber , J. P. Lazar , J. W. Lee , K. Leonard DeHolton , A. Leszczyńska , J. Liao , M. Lincetto , Q. R. Liu , Y. T. Liu , M. Liubarska , E. Lohfink , C. Love , C. J. Lozano Mariscal , L. Lu , F. Lucarelli , W. Luszczak , Y. Lyu , J. Madsen , E. Magnus , K. B. M. Mahn , Y. Makino , E. Manao , S. Mancina , W. Marie Sainte , I. C. Mariş , S. Marka , Z. Marka , M. Marsee , I. Martinez-Soler , R. Maruyama , F. Mayhew , F. McNally , J. V. Mead , K. Meagher , S. Mechbal , A. Medina , M. Meier , Y. Merckx , L. Merten , J. Micallef , J. Mitchell , T. Montaruli , R. W. Moore , Y. Morii , R. Morse , M. Moulai , T. Mukherjee , R. Naab , R. Nagai , M. Nakos , U. Naumann , J. Necker , A. Negi , L. Neste , M. Neumann , H. Niederhausen , M. U. Nisa , K. Noda , A. Noell , A. Novikov , A. Obertacke Pollmann , V. O'Dell , B. Oeyen , A. Olivas , R. Orsoe , J. Osborn , E. O'Sullivan , H. Pandya , N. Park , G. K. Parker , E. N. Paudel , L. Paul , C. Pérez de los Heros , T. Pernice , J. Peterson , S. Philippen , A. Pizzuto , M. Plum , A. Pontén , Y. Popovych , M. Prado Rodriguez , B. Pries , R. Procter-Murphy , G. T. Przybylski , C. Raab , J. Rack-Helleis , M. Ravn , K. Rawlins , Z. Rechav , A. Rehman , P. Reichherzer , E. Resconi , S. Reusch , W. Rhode , B. Riedel , A. Rifaie , E. J. Roberts , S. Robertson , S. Rodan , G. Roellinghoff , M. Rongen , A. Rosted , C. Rott , T. Ruhe , L. Ruohan , D. Ryckbosch , I. Safa , J. Saffer , D. Salazar-Gallegos , P. Sampathkumar , A. Sandrock , M. Santander , S. Sarkar , S. Sarkar , J. Savelberg , P. Savina , P. Schaile , M. Schaufel , H. Schieler , S. Schindler , B. Schlüter , F. Schlüter , N. Schmeisser , T. Schmidt , J. Schneider , F. G. Schröder , L. Schumacher , S. Sclafani , D. Seckel , M. Seikh , M. Seo , S. Seunarine , P. Sevle Myhr , R. Shah , S. Shefali , N. Shimizu , M. Silva , B. Skrzypek , B. Smithers , R. Snihur , J. Soedingrekso , A. Søgaard , D. Soldin , P. Soldin , G. Sommani , C. Spannfellner , G. M. Spiczak , C. Spiering , M. Stamatikos , T. Stanev , T. Stezelberger , T. Stürwald , T. Stuttard , G. W. Sullivan , I. Taboada , S. Ter-Antonyan , A. Terliuk , M. Thiesmeyer , W. G. Thompson , J. Thwaites , S. Tilav , K. Tollefson , C. Tönnis , S. Toscano , D. Tosi , A. Trettin , R. Turcotte , J. P. Twagirayezu , M. A. Unland Elorrieta , A. K. Upadhyay , K. Upshaw , A. Vaidyanathan , N. Valtonen-Mattila , J. Vandenbroucke , N. van Eijndhoven , D. Vannerom , J. van Santen , J. Vara , F. Varsi , J. Veitch-Michaelis , M. Venugopal , M. Vereecken , S. Verpoest , D. Veske , A. Vijai , C. Walck , A. Wang , C. Weaver , P. Weigel , A. Weindl , J. Weldert , A. Y. Wen , C. Wendt , J. Werthebach , M. Weyrauch , N. Whitehorn , C. H. Wiebusch , D. R. Williams , L. Witthaus , A. Wolf , M. Wolf , G. Wrede , X. W. Xu , J. P. Yanez , E. Yildizci , S. Yoshida , R. Young , S. Yu , T. Yuan , Z. Zhang , P. Zhelnin , P. Zilberman , M. Zimmerman

Searching for High-Energy Neutrino Emission from Seyfert Galaxies in the Northern Sky with IceCube

The recent detection of TeV neutrino emission from the nearby active galaxy NGC 1068 by IceCube suggests that AGN could make a sizable contribution to the total high-energy cosmic neutrino flux. The absence of TeV gamma rays from NGC 1068,…

High Energy Astrophysical Phenomena · Physics 2023-08-02 Theo Glauch , Ali Kheirandish , Tomas Kontrimas , Qinrui Liu , Hans Niederhausen

Hidden Hearts of Neutrino Active Galaxies

Recent multimessenger studies have provided evidence for high-energy neutrino sources that are opaque to GeV-TeV gamma rays. We present model-independent studies on the connection between neutrinos and gamma rays in the active galaxy NGC…

High Energy Astrophysical Phenomena · Physics 2023-01-04 Kohta Murase

IceCube: Neutrinos from Active Galaxies

The IceCube project transformed a cubic kilometer of transparent, natural Antarctic ice into a Cherenkov detector. It discovered neutrinos of TeV-PeV energy originating beyond our Galaxy with an energy flux that exceeds the one of…

High Energy Astrophysical Phenomena · Physics 2023-05-15 Francis Halzen

On the Neutrino and Gamma-Ray Emission from NGC 1068

IceCube has recently reported the detection of $\sim 1-10 \,{\rm TeV}$ neutrinos from the nearby active galaxy, NGC 1068. The lack of TeV-scale emission from this source suggests that these neutrinos are generated in the dense corona that…

High Energy Astrophysical Phenomena · Physics 2023-07-10 Carlos Blanco , Dan Hooper , Tim Linden , Elena Pinetti

Evaluating the Contribution of Active Galactic Nuclei to the Diffuse High-Energy Neutrino Flux

The detection of high-energy neutrinos from NGC 1068 and TXS-0506+56 suggests that active galactic nuclei (AGN) may contribute significantly to the the diffuse neutrino flux measured by IceCube. Using 10 years of publicly available IceCube…

High Energy Astrophysical Phenomena · Physics 2026-02-03 Samyak Jain , Dan Hooper , Francis Halzen

On the Origin of High Energy Neutrinos from NGC 1068: The Role of Non-Thermal Coronal Activity

NGC 1068, a nearby type-2 Seyfert galaxy, is reported as the hottest neutrino spot in the 10-year survey data of IceCube. Although there are several different possibilities for the generation of high-energy neutrinos in astrophysical…

High Energy Astrophysical Phenomena · Physics 2020-03-18 Yoshiyuki Inoue , Dmitry Khangulyan , Akihiro Doi

Hidden Cores of Active Galactic Nuclei as the Origin of Medium-Energy Neutrinos: Critical Tests with the MeV Gamma-Ray Connection

Mysteries about the origin of high-energy cosmic neutrinos have deepened by the recent IceCube measurement of a large diffuse flux in the 10-100 TeV range. Based on the standard disk-corona picture of active galactic nuclei (AGN), we…

High Energy Astrophysical Phenomena · Physics 2020-08-11 Kohta Murase , Shigeo S. Kimura , Peter Meszaros

A magnetized strongly turbulent corona as the source of neutrinos from NGC 1068

The cores of active galactic nuclei (AGN) are potential accelerators of 10-100 TeV cosmic rays, in turn producing high-energy neutrinos. This picture was confirmed by the compelling evidence of a TeV neutrino signal from the nearby active…

High Energy Astrophysical Phenomena · Physics 2024-10-18 Damiano F. G. Fiorillo , Luca Comisso , Enrico Peretti , Maria Petropoulou , Lorenzo Sironi

The neutrino background from non-jetted active galactic nuclei

Aims. We calculate the contribution to the neutrino background from the non-jetted active galactic nuclei (AGN) population following the recent IceCube association of TeV neutrinos with NGC 1068. Methods. We exploit our robust knowledge of…

High Energy Astrophysical Phenomena · Physics 2024-04-24 P. Padovani , R. Gilli , E. Resconi , C. Bellenghi , F. Henningsen

The contribution of turbulent AGN coronae to the diffuse neutrino flux

Active galactic nuclei (AGN) can accelerate protons to energies of $\sim$10-100 TeV, with secondary production of high-energy neutrinos. If the acceleration is driven by magnetized turbulence, the main properties of the resulting proton and…

High Energy Astrophysical Phenomena · Physics 2025-11-24 Damiano F. G. Fiorillo , Luca Comisso , Enrico Peretti , Maria Petropoulou , Lorenzo Sironi

Evidence for neutrino emission from the nearby active galaxy NGC 1068

We report three searches for high energy neutrino emission from astrophysical objects using data recorded with IceCube between 2011 and 2020. Improvements over previous work include new neutrino reconstruction and data calibration methods.…

High Energy Astrophysical Phenomena · Physics 2024-02-12 IceCube Collaboration , R. Abbasi , M. Ackermann , J. Adams , J. A. Aguilar , M. Ahlers , M. Ahrens , J. M. Alameddine , C. Alispach , A. A. Alves , N. M. Amin , K. Andeen , T. Anderson , G. Anton , C. Argüelles , Y. Ashida , S. Axani , X. Bai , A. Balagopal V. , A. Barbano , S. W. Barwick , B. Bastian , V. Basu , S. Baur , R. Bay , J. J. Beatty , K. -H. Becker , J. Becker Tjus , C. Bellenghi , S. BenZvi , D. Berley , E. Bernardini , D. Z. Besson , G. Binder , D. Bindig , E. Blaufuss , S. Blot , M. Boddenberg , F. Bontempo , J. Borowka , S. Böser , O. Botner , J. Böttcher , E. Bourbeau , F. Bradascio , J. Braun , B. Brinson , S. Bron , J. Brostean-Kaiser , S. Browne , A. Burgman , R. T. Burley , R. S. Busse , M. A. Campana , E. G. Carnie-Bronca , C. Chen , Z. Chen , D. Chirkin , K. Choi , B. A. Clark , K. Clark , L. Classen , A. Coleman , G. H. Collin , J. M. Conrad , P. Coppin , P. Correa , D. F. Cowen , R. Cross , C. Dappen , P. Dave , C. De Clercq , J. J. DeLaunay , D. Delgado López , H. Dembinski , K. Deoskar , A. Desai , P. Desiati , K. D. de Vries , G. de Wasseige , M. de With , T. DeYoung , A. Diaz , J. C. Díaz-Vélez , M. Dittmer , H. Dujmovic , M. Dunkman , M. A. DuVernois , E. Dvorak , T. Ehrhardt , P. Eller , R. Engel , H. Erpenbeck , J. Evans , P. A. Evenson , K. L. Fan , A. R. Fazely , A. Fedynitch , N. Feigl , S. Fiedlschuster , A. T. Fienberg , K. Filimonov , C. Finley , L. Fischer , D. Fox , A. Franckowiak , E. Friedman , A. Fritz , P. Fürst , T. K. Gaisser , J. Gallagher , E. Ganster , A. Garcia , S. Garrappa , L. Gerhardt , A. Ghadimi , C. Glaser , T. Glauch , T. Glüsenkamp , A. Goldschmidt , J. G. Gonzalez , S. Goswami , D. Grant , T. Grégoire , S. Griswold , C. Günther , P. Gutjahr , C. Haack , A. Hallgren , R. Halliday , L. Halve , F. Halzen , M. Ha Minh , K. Hanson , J. Hardin , A. A. Harnisch , A. Haungs , D. Hebecker , K. Helbing , F. Henningsen , E. C. Hettinger , S. Hickford , J. Hignight , C. Hill , G. C. Hill , K. D. Hoffman , R. Hoffmann , B. Hokanson-Fasig , K. Hoshina , F. Huang , M. Huber , T. Huber , K. Hultqvist , M. Hünnefeld , R. Hussain , K. Hymon , S. In , N. Iovine , A. Ishihara , M. Jansson , G. S. Japaridze , M. Jeong , M. Jin , B. J. P. Jones , D. Kang , W. Kang , X. Kang , A. Kappes , D. Kappesser , L. Kardum , T. Karg , M. Karl , A. Karle , U. Katz , M. Kauer , M. Kellermann , J. L. Kelley , A. Kheirandish , K. Kin , T. Kintscher , J. Kiryluk , S. R. Klein , R. Koirala , H. Kolanoski , T. Kontrimas , L. Köpke , C. Kopper , S. Kopper , D. J. Koskinen , P. Koundal , M. Kovacevich , M. Kowalski , T. Kozynets , E. Kun , N. Kurahashi , N. Lad , C. Lagunas Gualda , J. L. Lanfranchi , M. J. Larson , F. Lauber , J. P. Lazar , J. W. Lee , K. Leonard , A. Leszczyńska , Y. Li , M. Lincetto , Q. R. Liu , M. Liubarska , E. Lohfink , C. J. Lozano Mariscal , L. Lu , F. Lucarelli , A. Ludwig , W. Luszczak , Y. Lyu , W. Y. Ma , J. Madsen , K. B. M. Mahn , Y. Makino , S. Mancina , I. C. Mariş , I. Martinez-Soler , R. Maruyama , K. Mase , T. McElroy , F. McNally , J. V. Mead , K. Meagher , S. Mechbal , A. Medina , M. Meier , S. Meighen-Berger , J. Micallef , D. Mockler , T. Montaruli , R. W. Moore , R. Morse , M. Moulai , R. Naab , R. Nagai , R. Nahnhauer , U. Naumann , J. Necker , L. V. Nguyên , H. Niederhausen , M. U. Nisa , S. C. Nowicki , D. Nygren , A. Obertacke Pollmann , M. Oehler , B. Oeyen , A. Olivas , E. O'Sullivan , H. Pandya , D. V. Pankova , N. Park , G. K. Parker , E. N. Paudel , L. Paul , C. Pérez de los Heros , L. Peters , J. Peterson , S. Philippen , S. Pieper , M. Pittermann , A. Pizzuto , M. Plum , Y. Popovych , A. Porcelli , M. Prado Rodriguez , P. B. Price , B. Pries , G. T. Przybylski , C. Raab , J. Rack-Helleis , A. Raissi , M. Rameez , K. Rawlins , I. C. Rea , A. Rehman , P. Reichherzer , R. Reimann , G. Renzi , E. Resconi , S. Reusch , W. Rhode , M. Richman , B. Riedel , E. J. Roberts , S. Robertson , G. Roellinghoff , M. Rongen , C. Rott , T. Ruhe , D. Ryckbosch , D. Rysewyk Cantu , I. Safa , J. Saffer , S. E. Sanchez Herrera , A. Sandrock , J. Sandroos , M. Santander , S. Sarkar , S. Sarkar , K. Satalecka , M. Schaufel , H. Schieler , S. Schindler , T. Schmidt , A. Schneider , J. Schneider , F. G. Schröder , L. Schumacher , G. Schwefer , S. Sclafani , D. Seckel , S. Seunarine , A. Sharma , S. Shefali , M. Silva , B. Skrzypek , B. Smithers , R. Snihur , J. Soedingrekso , D. Soldin , C. Spannfellner , G. M. Spiczak , C. Spiering , J. Stachurska , M. Stamatikos , T. Stanev , R. Stein , J. Stettner , A. Steuer , T. Stezelberger , R. Stokstad , T. Stürwald , T. Stuttard , G. W. Sullivan , I. Taboada , S. Ter-Antonyan , S. Tilav , F. Tischbein , K. Tollefson , C. Tönnis , S. Toscano , D. Tosi , A. Trettin , M. Tselengidou , C. F. Tung , A. Turcati , R. Turcotte , C. F. Turley , J. P. Twagirayezu , B. Ty , M. A. Unland Elorrieta , N. Valtonen-Mattila , J. Vandenbroucke , N. van Eijndhoven , D. Vannerom , J. van Santen , S. Verpoest , C. Walck , T. B. Watson , C. Weaver , P. Weigel , A. Weindl , M. J. Weiss , J. Weldert , C. Wendt , J. Werthebach , M. Weyrauch , N. Whitehorn , C. H. Wiebusch , D. R. Williams , M. Wolf , K. Woschnagg , G. Wrede , J. Wulff , X. W. Xu , J. P. Yanez , S. Yoshida , S. Yu , T. Yuan , Z. Zhang , P. Zhelnin

High-energy Neutrino Emission from NGC 1068 by Outflow-cloud Interactions

As the hottest high-energy neutrino spot, NGC 1068 has received much attention in recent years. Here we focus on the central region of the active galactic nuclei (AGN) and propose an outflow-cloud interaction model that could probably…

High Energy Astrophysical Phenomena · Physics 2024-06-21 Yong-Han Huang , Kai Wang , Zhi-Peng Ma

High-Energy Neutrinos from Magnetized Coronae of Active Galactic Nuclei and Prospects for Identification of Seyfert Galaxies and Quasars in Neutrino Telescopes

Particles may be accelerated in magnetized coronae via magnetic reconnections and/or plasma turbulence, leading to high-energy neutrinos and soft gamma rays. We evaluate the detectability of neutrinos from nearby bright Seyfert galaxies…

High Energy Astrophysical Phenomena · Physics 2021-11-25 Ali Kheirandish , Kohta Murase , Shigeo S. Kimura

High-energy Neutrinos from the Inner Circumnuclear Region of NGC 1068

High-energy neutrinos are detected by the IceCube Observatory in the direction of NGC 1068, the archetypical type II Seyfert galaxy. The neutrino flux, surprisingly, is more than an order of magnitude higher than the $\gamma$-ray upper…

High Energy Astrophysical Phenomena · Physics 2023-10-03 Ke Fang , Enrique Lopez Rodriguez , Francis Halzen , John S. Gallagher

Multimessenger Characterization of High-Energy Neutrino Emission from the Brightest Neutrino-Active Galactic Nuclei

The observation of high-energy neutrinos from the direction of the nearby active galaxy, NGC 1068, was a major step in identifying the origin of high-energy cosmic neutrinos. The multimessenger data imply that high-energy neutrinos…

High Energy Astrophysical Phenomena · Physics 2026-05-27 Jose Alonso Carpio , Ali Kheirandish , Kohta Murase

Obscured flat spectrum radio AGN as sources of high-energy neutrinos

Active Galactic Nuclei (AGN) are believed to be one of the main source candidates for the high-energy (TeV-PeV) cosmic neutrino flux recently discovered by the IceCube neutrino observatory. Nevertheless, several correlation studies between…

High Energy Astrophysical Phenomena · Physics 2016-11-23 G. Maggi , S. Buitink , P. Correa , K. D. de Vries , G. Gentile , J. Leon Tavares , O. Scholten , N. van Eijndhoven , M. Vereecken , T. Winchen

Diffuse neutrino flux from relativistic reconnection in AGN coronae

IceCube observations point to Active Galactic Nuclei (AGN) as promising contributors to the observed astrophysical neutrino flux. Close to the central black hole, protons can be accelerated through magnetic reconnection to very high…

High Energy Astrophysical Phenomena · Physics 2026-05-13 D. Karavola , M. Petropoulou , D. F. G. Fiorillo , A. Georgakakis , L. Comisso , L. Sironi

Does the spectral break in the IceCube diffuse neutrino spectrum originate from AGN evolution?

The enigmatic origin of the diffuse neutrino background detected by IceCube in the energy range from TeV to PeV remains one of the central open problems in high-energy astrophysics, and this puzzle is further deepened by the recent evidence…

High Energy Astrophysical Phenomena · Physics 2026-04-10 Caijin Xie , Zijian Qiu , Yudong Cui , Sujie Lin , Lili Yang