Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS

Martin Pohl; I. Sadeh; S. Archambault; A. Archer; W. Benbow; M. Buchovecky; V. Bugaev; M. Cerruti; M. P. Connolly; W. Cui; A. Falcone; M. Fernández Alonso; J. P. Finley; H. Fleischhack; L. Fortson; A. Furniss; S. Griffin; Moritz Huetten; O. Hervet; J. Holder; T. B. Humensky; C. A. Johnson; P. Kaaret; P. Kar; D. Kieda; M. Krause; F. Krennrich; M. J. Lang; T. T. Y. Lin; G. Maier; S. Mcarthur; P. Moriarty; D. Nieto; S. O’brien; R. A. Ong; A. N. Otte; A. Popkow; E. Pueschel; J. Quinn; K. Ragan; P. T. Reynolds; G. T. Richards; E. Roache; A. C. Rovero; K. Shahinyan; D. Staszak; I. Telezhinsky; J. Tyler; S. P. Wakely; A. Weinstein; T. Weisgarber; P. Wilcox; Alina Wilhelm; D. A. Williams; B. Zitzer

doi:10.3847/1538-4357/835/2/288

Back

Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS

Journal article

Open access

Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS

Martin Pohl, I. Sadeh, S. Archambault, A. Archer, W. Benbow, M. Buchovecky, V. Bugaev, M. Cerruti, M. P. Connolly, W. Cui, …

The Astrophysical journal, v 835(2)

01 Jan 2017

DOI: https://doi.org/10.3847/1538-4357/835/2/288

Featured in Collection : UN Sustainable Development Goals @ Drexel

Files and links (1)

url

https://doi.org/10.3847/1538-4357/835/2/288View

Published, Version of Record (VoR)CC BY-NC-ND V4.0, Open

Abstract

Astronomía

Ciencias Físicas

We present a search for magnetically broadened gamma-ray emission around active galactic nuclei (AGNs), using VERITAS observations of seven hard-spectrum blazars. A cascade process occurs when multi-TeV gamma-rays from an AGN interact with extragalactic background light (EBL) photons to produce electron-positron pairs, which then interact with cosmic microwave background photons via inverse-Compton scattering to produce gamma-rays. Due to the deflection of the electron-positron pairs, a non-zero intergalactic magnetic field (IGMF) would potentially produce detectable effects on the angular distribution of the cascade emission. In particular, an angular broadening compared to the unscattered emission could occur. Through non-detection of angularly broadened emission from 1ES 1218+304, the source with the largest predicted cascade fraction, we exclude a range of IGMF strengths around 10-14 G at the 95% confidence level. The extent of the exclusion range varies with the assumptions made about the intrinsic spectrum of 1ES 1218+304 and the EBL model used in the simulation of the cascade process. All of the sources are used to set limits on the flux due to extended emission. Fil: Archambault, S.. Mcgill University; Fil: Archer, A.. Washington University in St. Louis; Estados Unidos Fil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Buchovecky, M.. University of California at Los Angeles; Estados Unidos Fil: Bugaev, V.. Washington University in St. Louis; Estados Unidos Fil: Cerruti, M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Connolly, M.P.. National University Of Ireland Galway; Fil: Cui, W.. Tsinghua University; . Purdue University; Estados Unidos Fil: Falcone, A.. Pennsylvania State University; Fil: Alonso, M. Fernández. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Finley, J.P.. Purdue University; Estados Unidos Fil: Fleischhack, H.. Deutsche Elektronen-synchrotron; Fil: Fortson, L.. University of Minnesota; Estados Unidos Fil: Furniss, A.. California State University; Estados Unidos Fil: Griffin, S.. Mcgill University; Fil: Hütten, M.. Deutsche Elektronen-synchrotron; Fil: Hervet, O.. Santa Cruz Institute For Particle Physics; Fil: Holder, J.. Bartol Research Institute; Fil: Humensky, T.B.. Columbia University In The City Of New York; Fil: Johnson, C.A.. Santa Cruz Institute For Particle Physics; Fil: Kaaret, P.. University of Iowa; Estados Unidos Fil: Kar, P.. University of Utah; Estados Unidos Fil: Kieda, D.. University of Utah; Estados Unidos Fil: Krause, M.. Deutsche Elektronen-synchrotron; Fil: Krennrich, F.. IOWA STATE UNIVERSITY (ISU); Fil: Lang, M.J.. National University Of Ireland Galway; Fil: Lin, T.T.Y.. Mcgill University; Fil: Maier, G.. Deutsche Elektronen-synchrotron; Fil: McArthur, S.. Purdue University; Estados Unidos Fil: Moriarty, P.. National University Of Ireland Galway; Fil: Nieto, D.. Columbia University In The City Of New York; Fil: O'Brien, S.. University College Dublin; Fil: Ong, R.A.. University of California at Los Angeles; Estados Unidos Fil: Otte, A.N.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados Unidos Fil: Pohl, M.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania Fil: Popkow, A.. University of California at Los Angeles; Estados Unidos Fil: Pueschel, E.. University College Dublin; Fil: Quinn, J.. University College Dublin; Fil: Ragan, K.. Mcgill University; Fil: Reynolds, P.T.. Cork Institute Of Technology; Fil: Richards, G.T.. Instituto Tecnológico de Georgia; Estados Unidos. Georgia Institute of Techology; Estados Unidos Fil: Roache, E.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Rovero, Adrian Carlos. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Sadeh, I.. Deutsche Elektronen-synchrotron; Fil: Shahinyan, K.. University of Minnesota; Estados Unidos Fil: Staszak, D.. University of Chicago; Estados Unidos Fil: Telezhinsky, I.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania Fil: Tyler, J.. Mcgill University; Fil: Wakely, S.P.. University of Chicago; Estados Unidos Fil: Weinstein, A.. IOWA STATE UNIVERSITY (ISU); Fil: Weisgarber, T.. University Of Wisconsin Madison; Fil: Wilcox, P.. University of Iowa; Estados Unidos Fil: Wilhelm, A.. Deutsche Elektronen-synchrotron; . Universitat Potsdam; Alemania Fil: Williams, D.A.. Santa Cruz Institute For Particle Physics; Fil: Zitzer, B.. Mcgill University;

Metrics

9 Record Views

45 citations in Web of Science

51 citations in Scopus

Details

Title: Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS
Creators: Martin Pohl - University of Potsdam
I. Sadeh
S. Archambault - McGill University
A. Archer - Washington University in St. Louis
W. Benbow - Harvard University
M. Buchovecky - University of California, Los Angeles
V. Bugaev - Washington University in St. Louis
M. Cerruti - Harvard University
M. P. Connolly - National University of Ireland, Galway
W. Cui - Tsinghua University
A. Falcone - Pennsylvania State University
M. Fernández Alonso - University of Buenos Aires
J. P. Finley - Purdue University West Lafayette
H. Fleischhack
L. Fortson - University of Minnesota
A. Furniss - California State University System
S. Griffin - McGill University
Moritz Huetten
O. Hervet - University of California, Santa Cruz
J. Holder - University of Delaware
T. B. Humensky - Columbia University
C. A. Johnson - University of California, Santa Cruz
P. Kaaret - University of Iowa
P. Kar - University of Utah
D. Kieda - University of Utah
M. Krause
F. Krennrich - Iowa State University
M. J. Lang - National University of Ireland, Galway
T. T. Y. Lin - McGill University
G. Maier
S. Mcarthur - Purdue University West Lafayette
P. Moriarty - National University of Ireland, Galway
D. Nieto - Columbia University
S. O’brien
R. A. Ong - University of California, Los Angeles
A. N. Otte - Georgia Institute of Technology
A. Popkow - University of California, Los Angeles
E. Pueschel - University College Dublin
J. Quinn - University College Dublin
K. Ragan - McGill University
P. T. Reynolds - Cork Institute of Technology
G. T. Richards - Georgia Institute of Technology
E. Roache - Harvard University
A. C. Rovero - University of Buenos Aires
K. Shahinyan - University of Minnesota
D. Staszak - University of Chicago
I. Telezhinsky - University of Potsdam
J. Tyler - McGill University
S. P. Wakely - University of Chicago
A. Weinstein
T. Weisgarber - University of Wisconsin–Madison
P. Wilcox - University of Iowa
Alina Wilhelm - University of Potsdam
D. A. Williams - University of California, Santa Cruz
B. Zitzer - McGill University
Publication Details: The Astrophysical journal, v 835(2)
Publisher: IOP Publ
Resource Type: Journal article
Language: English
Academic Unit: Physics
Web of Science ID: WOS:000401226000002
Scopus ID: 2-s2.0-85011961389
Other Identifier: 991019201494004721

UN Sustainable Development Goals (SDGs)

This publication has contributed to the advancement of the following goals:

InCites Highlights

Data related to this publication, from InCites Benchmarking & Analytics tool:

Collaboration types: Domestic collaboration; International collaboration
Web of Science research areas: Astronomy & Astrophysics

Search for Magnetically Broadened Cascade Emission from Blazars with VERITAS

Files and links (1)

Abstract

Metrics

Details

UN Sustainable Development Goals (SDGs)

InCites Highlights

Drexel University Social media