Extragalactic magnetic fields constraints from simultaneous GeV–TeV observations of blazars
TLDR
In this paper, the EGMF bound on the hidden assumptions it rests upon was derived from the simultaneous GeV-TeV data on the blazars RGB J0710+591, 1ES 0229+200 and 1ES 1218+304.Abstract:
Context. Attenuation of the TeV γ-ray flux from distant blazars through pair production with extragalactic background light leads to the development of electromagnetic cascades and subsequent, lower energy, GeV secondary γ-ray emission. Due to the deflection of VHE cascade electrons by extragalactic magnetic fields (EGMF), the spectral shape of this arriving cascade γ-ray emission is dependent on the strength of the EGMF. Thus, the spectral shape of the GeV–TeV emission from blazars has the potential to probe the EGMF strength along the line of sight to the object. Constraints on the EGMF previously derived from the gamma-ray data suffer from an uncertainty related to the non-simultaneity of GeV and TeV band observations. Aims. We investigate constraints on the EGMF derived from observations of blazars for which TeV observations simultaneous with those by Fermi telescope were reported. We study the dependence of the EGMF bound on the hidden assumptions it rests upon. Methods. We select blazar objects for which simultaneous Fermi/LAT GeV and Veritas, MAGIC or HESS TeV emission have been published. We model the development of electromagnetic cascades along the gamma-ray beams from these sources using Monte Carlo simulations, including the calculation of the temporal delay incurred by cascade photons, relative to the light propagation time of direct γ-rays from the source. Results. Constraints on the EGMF could be derived from the simultaneous GeV–TeV data on the blazars RGB J0710+591, 1ES 0229+200, and 1ES 1218+304. The measured source flux level in the GeV band is lower than the flux of the expected cascade component calculated under the assumption of zero EGMF. Assuming that the reason for the suppression of the cascade component is the extended nature of the cascade emission, we find that B 10 −15 G (assuming an EGMF correlation length of ≥1 Mpc) is consistent with the data. Alternatively, the assumption that the suppression of the cascade emission is caused by the time delay of the cascade photons the data are consistent with B 10 −17 G for the same correlation length.read more
Citations
More filters
Journal ArticleDOI
Clusters of galaxies: observational properties of the diffuse radio emission
TL;DR: In this paper, a review of the observational properties of diffuse non-thermal sources detected in galaxy clusters: halos, relics and mini-halos is presented, as well as the properties of large-scale magnetic fields in clusters.
Journal ArticleDOI
Cosmological Magnetic Fields: Their Generation, Evolution and Observation
Ruth Durrer,Andrii Neronov +1 more
TL;DR: In this paper, the authors discuss the possible mechanisms for the generation of cosmological magnetic fields, discuss their evolution in an expanding universe filled with the cosmic plasma and provide a critical review of the literature on the subject.
Journal ArticleDOI
Planck 2015 results: XIX. Constraints on primordial magnetic fields
Peter A. R. Ade,Nabila Aghanim,Monique Arnaud,Frederico Arroja,M. Ashdown,J. Aumont,Carlo Baccigalupi,Mario Ballardini,A. J. Banday,A. J. Banday,R. B. Barreiro,N. Bartolo,N. Bartolo,E. Battaner,K. Benabed,Alain Benoit,A. Benoit-Lévy,A. Benoit-Lévy,J.-P. Bernard,J.-P. Bernard,Marco Bersanelli,P. Bielewicz,P. Bielewicz,J. J. Bock,Anna Bonaldi,Laura Bonavera,J. R. Bond,Julian Borrill,Julian Borrill,François R. Bouchet,M. Bucher,Carlo Burigana,Carlo Burigana,R. C. Butler,Erminia Calabrese,Jean-François Cardoso,Jean-François Cardoso,Jean-François Cardoso,A. Catalano,A. Catalano,A. Chamballu,A. Chamballu,A. Chamballu,H. C. Chiang,Jens Chluba,P. R. Christensen,Sarah E. Church,David L. Clements,S. Colombi,L. P. L. Colombo,C. Combet,F. Couchot,A. Coulais,B. P. Crill,A. Curto,F. Cuttaia,Luigi Danese,R. D. Davies,R. J. Davis,P. de Bernardis,A. de Rosa,G. de Zotti,G. de Zotti,Jacques Delabrouille,F.-X. Désert,Jose M. Diego,Klaus Dolag,H. Dole,H. Dole,S. Donzelli,Olivier Doré,Marian Douspis,A. Ducout,A. Ducout,X. Dupac,George Efstathiou,F. Elsner,F. Elsner,Torsten A. Enßlin,H. K. Eriksen,James R. Fergusson,Fabio Finelli,Estrella Florido,Olivier Forni,Olivier Forni,M. Frailis,A. A. Fraisse,E. Franceschi,A. Frejsel,S. Galeotta,S. Galli,K. Ganga,M. Giard,M. Giard,Y. Giraud-Héraud,E. Gjerløw,J. González-Nuevo,J. González-Nuevo,Krzysztof M. Gorski,Serge Gratton,A. Gregorio,A. Gregorio,Alessandro Gruppuso,Jon E. Gudmundsson,F. K. Hansen,Duncan Hanson,Duncan Hanson,Duncan Hanson,D. L. Harrison,George Helou,Sophie Henrot-Versille,C. Hernández-Monteagudo,D. Herranz,S. R. Hildebrandt,E. Hivon,Michael P. Hobson,W. A. Holmes,Allan Hornstrup,W. Hovest,Kevin M. Huffenberger,G. Hurier,Andrew H. Jaffe,T. R. Jaffe,T. R. Jaffe,W. C. Jones,Mika Juvela,E. Keihänen,Reijo Keskitalo,J. B. Kim,Theodore Kisner,J. Knoche,Martin Kunz,Martin Kunz,Martin Kunz,Hannu Kurki-Suonio,Guilaine Lagache,Guilaine Lagache,Anne Lähteenmäki,Anne Lähteenmäki,J.-M. Lamarre,Anthony Lasenby,Massimiliano Lattanzi,Charles R. Lawrence,J. P. Leahy,R. Leonardi,Julien Lesgourgues,Julien Lesgourgues,François Levrier,Michele Liguori,Michele Liguori,P. B. Lilje,M. Linden-Vørnle,M. López-Caniego,M. López-Caniego,Philip Lubin,J. F. Macías-Pérez,G. Maggio,Davide Maino,N. Mandolesi,N. Mandolesi,A. Mangilli,Michele Maris,Peter G. Martin,E. Martínez-González,Silvia Masi,Sabino Matarrese,Sabino Matarrese,P. McGehee,Peter Meinhold,Alessandro Melchiorri,L. Mendes,A. Mennella,M. Migliaccio,Subhasish Mitra,Subhasish Mitra,M.-A. Miville-Deschênes,M.-A. Miville-Deschênes,D. Molinari,D. Molinari,A. Moneti,L. Montier,L. Montier,Gianluca Morgante,Daniel J. Mortlock,Adam Moss,Dipak Munshi,J. A. Murphy,Pavel Naselsky,Federico Nati,Paolo Natoli,Paolo Natoli,Paolo Natoli,Calvin B. Netterfield,Hans Ulrik Nørgaard-Nielsen,F. Noviello,Dmitry Novikov,I. D. Novikov,Niels Oppermann,C. A. Oxborrow,F. Paci,L. Pagano,F. Pajot,Daniela Paoletti,F. Pasian,G. Patanchon,O. Perdereau,L. Perotto,Francesca Perrotta,Valeria Pettorino,F. Piacentini,M. Piat,E. Pierpaoli,Davide Pietrobon,Stéphane Plaszczynski,Etienne Pointecouteau,Etienne Pointecouteau,G. Polenta,G. Polenta,L. Popa,G. W. Pratt,G. Prézeau,Simon Prunet,J.-L. Puget,Jörg P. Rachen,Jörg P. Rachen,Rafael Rebolo,Rafael Rebolo,M. Reinecke,Mathieu Remazeilles,Mathieu Remazeilles,Mathieu Remazeilles,C. Renault,A. Renzi,I. Ristorcelli,I. Ristorcelli,Graca Rocha,C. Rosset,M. Rossetti,G. Roudier,Jose Alberto Rubino-Martin,Jose Alberto Rubino-Martin,B. Ruiz-Granados,Ben Rusholme,M. Sandri,D. Santos,M. Savelainen,Giorgio Savini,Douglas Scott,Michael Seiffert,E. P. S. Shellard,Maresuke Shiraishi,Maresuke Shiraishi,Locke D. Spencer,V. Stolyarov,R. Stompor,R. Sudiwala,R. A. Sunyaev,R. A. Sunyaev,D. Sutton,A.-S. Suur-Uski,J.-F. Sygnet,J. A. Tauber,Luca Terenzi,L. Toffolatti,L. Toffolatti,L. Toffolatti,M. Tomasi,M. Tristram,M. Tucci,J. Tuovinen,G. Umana,Luca Valenziano,Jussi-Pekka Väliviita,B. Van Tent,P. Vielva,Fabrizio Villa,L. A. Wade,Benjamin D. Wandelt,Benjamin D. Wandelt,Ingunn Kathrine Wehus,D. Yvon,Andrea Zacchei,Andrea Zonca +282 more
TL;DR: The impact of primordial magnetic fields (PMFs) on the CMB temperature and polarization spectra was investigated in this paper, with different bounds depending on the specific effect that is analysed.
Journal ArticleDOI
The origin, evolution and signatures of primordial magnetic fields
TL;DR: The linear and nonlinear evolution of the generated primordial fields through the radiation era, including viscous effects are traced, and primordial magnetic fields could strongly influence structure formation, especially on dwarf galaxy scales.
Journal ArticleDOI
BLAZARS AS ULTRA-HIGH-ENERGY COSMIC-RAY SOURCES: IMPLICATIONS FOR TeV GAMMA-RAY OBSERVATIONS
TL;DR: In this paper, the authors studied the effects of the structured extragalactic magnetic fields in which the sources should be embedded, and showed that required absolute cosmic-ray luminosities are larger than the average UHECR luminosity inferred from ultra-high-energy cosmic rays (UHECRs) observations.
References
More filters
Journal ArticleDOI
Fermi large area telescope first source catalog
A. A. Abdo,A. A. Abdo,Markus Ackermann,Marco Ajello,Alice Allafort,Elisa Antolini,Elisa Antolini,W. B. Atwood,Magnus Axelsson,Magnus Axelsson,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,B. M. Baughman,Keith Bechtol,Ronaldo Bellazzini,F. Belli,F. Belli,B. Berenji,Dario Bisello,Dario Bisello,Roger Blandford,E. D. Bloom,Emanuele Bonamente,Emanuele Bonamente,J. Bonnell,J. Bonnell,A. W. Borgland,A. Bouvier,Johan Bregeon,Alessandro Brez,M. Brigida,M. Brigida,P. Bruel,T. H. Burnett,G. Busetto,G. Busetto,S. Buson,S. Buson,G. A. Caliandro,R. A. Cameron,Riccardo Campana,B. Canadas,B. Canadas,P. A. Caraveo,S. Carrigan,J. M. Casandjian,E. Cavazzuti,M. Ceccanti,C. Cecchi,C. Cecchi,Omer Celik,Omer Celik,Eric Charles,A. Chekhtman,A. Chekhtman,C. C. Cheung,C. C. Cheung,James Chiang,A. N. Cillis,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Jan Conrad,Jan Conrad,R. H. D. Corbet,R. H. D. Corbet,David S. Davis,David S. Davis,M. Deklotz,P. R. den Hartog,Charles D. Dermer,A. De Angelis,A. De Luca,F. de Palma,F. de Palma,Seth Digel,M. Dormody,E. Do Couto E Silva,Persis S. Drell,R. Dubois,D. Dumora,D. Fabiani,C. Farnier,C. Favuzzi,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,W. B. Focke,P. Fortin,M. Frailis,Yasushi Fukazawa,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,Neil Gehrels,S. Germani,S. Germani,Gianluca Giavitto,Gianluca Giavitto,B. Giebels,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,F. Giordano,F. Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,I. A. Grenier,M.-H. Grondin,M.-H. Grondin,J. E. Grove,L. Guillemot,Sylvain Guiriec,Mats Gustafsson,D. Hadasch,Y. Hanabata,Alice K. Harding,M. Hayashida,E. Hays,S. E. Healey,A. B. Hill,D. Horan,R. E. Hughes,G. Iafrate,Gudlaugur Johannesson,A. S. Johnson,R. P. Johnson,Tyrel J. Johnson,Tyrel J. Johnson,W. N. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Nobuyuki Kawai,Matthew Kerr,Jürgen Knödlseder,D. Kocevski,M. Kuss,J. Lande,D. Landriu,Luca Latronico,Shiu-Hang Lee,M. Lemoine-Goumard,Andrea Lionetto,Andrea Lionetto,M. Llena Garde,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,B. Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,G. M. Madejski,A. Makeev,A. Makeev,B. Marangelli,B. Marangelli,M. Marelli,Enrico Massaro,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,Julie McEnery,Peter F. Michelson,Massimo Minuti,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,M. Mongelli,C. Monte,C. Monte,M. E. Monzani,Elena Moretti,Elena Moretti,A. Morselli,Igor V. Moskalenko,S. Murgia,Hiroshi Nakajima,Takeshi Nakamori,M. Naumann-Godo,P. L. Nolan,J. P. Norris,E. Nuss,Masanori Ohno,T. Ohsugi,Nicola Omodei,E. Orlando,Jonathan F. Ormes,M. Ozaki,Alessandro Paccagnella,Alessandro Paccagnella,David Paneque,J. H. Panetta,D. Parent,D. Parent,V. Pelassa,M. Pepe,M. Pepe,Melissa Pesce-Rollins,Michele Pinchera,F. Piron,T. A. Porter,L. Poupard,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,Paul S. Ray,M. Razzano,Soebur Razzaque,Soebur Razzaque,Nanda Rea,A. Reimer,Olaf Reimer,T. Reposeur,Joachim Ripken,Steven Ritz,L. S. Rochester,A. Y. Rodriguez,Roger W. Romani,M. Roth,Hartmut Sadrozinski,David Salvetti,David Sánchez,A. Sander,P. M. Saz Parkinson,Jeffrey D. Scargle,T. L. Schalk,G. Scolieri,Carmelo Sgrò,M. S. Shaw,E. J. Siskind,David S. Smith,P. D. Smith,Gloria Spandre,P. Spinelli,P. Spinelli,Jean-Luc Starck,T. E. Stephens,T. E. Stephens,E. Striani,E. Striani,M. S. Strickman,Andrew W. Strong,D. J. Suson,Hiroyasu Tajima,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,D. J. Thompson,L. Tibaldo,O. Tibolla,F. Tinebra,Diego F. Torres,Diego F. Torres,Gino Tosti,Gino Tosti,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,A. Van Etten,V. Vasileiou,V. Vasileiou,N. Vilchez,V. Vitale,V. Vitale,A. P. Waite,E. Wallace,P. Wang,K. Watters,Brian L Winer,Kent S. Wood,Zhenwei Yang,T. Ylinen,T. Ylinen,M. Ziegler +288 more
TL;DR: The first Fermi-LAT catalog (1FGL) as mentioned in this paper contains 1451 sources detected and characterized in the 100 MeV to 100 GeV range, and the threshold likelihood Test Statistic is 25, corresponding to a significance of just over 4 sigma.
Journal ArticleDOI
Extragalactic optical-infrared background radiation, its time evolution and the cosmic photon-photon opacity
TL;DR: In this article, the authors have modelled the extragalactic optical and infrared backgounds using available information on cosmic sources in the universe from far-UV to sub-millimeter wavelengths over a wide range of cosmic epochs, and applied their photon-photon opacity estimates to the analysis of spectral data at TeV energies on a few BLAZARs of particular interest.
Journal ArticleDOI
Evidence for Strong Extragalactic Magnetic Fields from Fermi Observations of TeV Blazars
Andrii Neronov,Ievgen Vovk +1 more
TL;DR: A lower bound B ≥ 3 × 10−16 gauss on the strength of intergalactic magnetic fields is reported, which stems from the nonobservation of GeV gamma-ray emission from electromagnetic cascade initiated by tera–electron volt gamma rays inintergalactic medium.
Journal ArticleDOI
Extragalactic magnetic fields
TL;DR: In this paper, the observational methods for detecting and measuring extragalactic magnetic fields are discussed, along with some new indirect methods which could be used for inferring field strengths at large redshifts which are otherwise beyond the reach of direct measurement.
Journal ArticleDOI
Magnetic Fields in the Early Universe
Dario Grasso,H. Rubinstein +1 more
TL;DR: In this paper, the authors discuss magnetic fields in the early universe, their origin, their possible detection, and their limits and values today and at early times, and discuss the possible detection of magnetic fields.
Related Papers (5)
Evidence for Strong Extragalactic Magnetic Fields from Fermi Observations of TeV Blazars
Andrii Neronov,Ievgen Vovk +1 more