Publication:
Gamma-Ray Blazars within the First 2 Billion Years

Issued Date

2017-03-01

Resource Type

Article

ISSN

20418213
20418205

DOI

10.3847/2041-8213/aa5fff

Other identifier(s)

2-s2.0-85015148943

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

Astrophysical Journal Letters. Vol.837, No.1 (2017)

Suggested Citation

M. Ackermann, M. Ajello, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, J. Becerra Gonzalez, R. Bellazzini, E. Bissaldi, R. D. Blandford, E. D. Bloom, R. Bonino, E. Bottacini, J. Bregeon, P. Bruel, R. Buehler, S. Buson, R. A. Cameron, M. Caragiulo, P. A. Caraveo, E. Cavazzuti, C. Cecchi, C. C. Cheung, J. Chiang, G. Chiaro, S. Ciprini, J. Conrad, D. Costantin, F. Costanza, S. Cutini, F. D'Ammando, F. De Palma, R. Desiante, S. W. Digel, N. Di Lalla, M. Di Mauro, L. Di Venere, A. Domínguez, P. S. Drell, C. Favuzzi, S. J. Fegan, E. C. Ferrara, J. Finke, W. B. Focke, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, D. Green, I. A. Grenier, L. Guillemot, S. Guiriec, D. H. Hartmann, E. Hays, D. Horan, T. Jogler, G. Jóhannesson, A. S. Johnson, M. Kuss, G. La Mura, S. Larsson, L. Latronico, J. Li, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, J. D. Magill, S. Maldera, A. Manfreda, L. Marcotulli, M. N. Mazziotta Gamma-Ray Blazars within the First 2 Billion Years. Astrophysical Journal Letters. Vol.837, No.1 (2017). doi:10.3847/2041-8213/aa5fff Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/42507

Research Projects

Organizational Units

Authors

Journal Issue

Thesis

Title

Gamma-Ray Blazars within the First 2 Billion Years

Author(s)

M. Ackermann
 M. Ajello
 L. Baldini
 J. Ballet
 G. Barbiellini
 D. Bastieri
 J. Becerra Gonzalez
 R. Bellazzini
 E. Bissaldi
 R. D. Blandford
 E. D. Bloom
 R. Bonino
 E. Bottacini
 J. Bregeon
 P. Bruel
 R. Buehler
 S. Buson
 R. A. Cameron
 M. Caragiulo
 P. A. Caraveo
 E. Cavazzuti
 C. Cecchi
 C. C. Cheung
 J. Chiang
 G. Chiaro
 S. Ciprini
 J. Conrad
 D. Costantin
 F. Costanza
 S. Cutini
 F. D'Ammando
 F. De Palma
 R. Desiante
 S. W. Digel
 N. Di Lalla
 M. Di Mauro
 L. Di Venere
 A. Domínguez
 P. S. Drell
 C. Favuzzi
 S. J. Fegan
 E. C. Ferrara
 J. Finke
 W. B. Focke
 Y. Fukazawa
 S. Funk
 P. Fusco
 F. Gargano
 D. Gasparrini
 N. Giglietto
 F. Giordano
 M. Giroletti
 D. Green
 I. A. Grenier
 L. Guillemot
 S. Guiriec
 D. H. Hartmann
 E. Hays
 D. Horan
 T. Jogler
 G. Jóhannesson
 A. S. Johnson
 M. Kuss
 G. La Mura
 S. Larsson
 L. Latronico
 J. Li
 F. Longo
 F. Loparco
 M. N. Lovellette
 P. Lubrano
 J. D. Magill
 S. Maldera
 A. Manfreda
 L. Marcotulli
 M. N. Mazziotta

Other Contributor(s)

Deutsche Elektronen-Synchrotron
 Clemson University
 Università di Pisa
 Universite Paris 7- Denis Diderot
 Istituto Nazionale di Fisica Nucleare, Roma
 Università degli Studi di Trieste
 Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
 Università degli Studi di Padova
 NASA Goddard Space Flight Center
 University of Maryland
 Istituto Nazionale Di Fisica Nucleare, Sezione di Pisa
 Kavli Institute for Particle Astrophysics and Cosmology
 Università degli Studi di Torino
 Laboratoire Univers et Particules de Montpellier
 Laboratoire Leprince-Ringuet
 Università degli Studi di Bari
 INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
 Agenzia Spaziale Italiana
 Università degli Studi di Perugia
 Naval Research Laboratory
 Stockholms universitet
 Oskar Klein Centre for Cosmoparticle Physics
 INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna
 Alma Mater Studiorum Università di Bologna
 Università degli Studi di Napoli Federico II
 Università degli Studi di Udine
 Hiroshima University
 Erlangen Centre for Astroparticle Physics
 Universite d'Orleans
 Institut National des Sciences de l'Univers
 Friedrich-Alexander-Universität Erlangen-Nürnberg
 University Science Institute Reykjavik
 The Royal Institute of Technology (KTH)
 Universitat Autònoma de Barcelona
 Mahidol University
 University of Denver
 Max Planck Institut für Physik (Werner-Heisenberg-Institut)
 Osservatorio Astronomico di Trieste

Abstract

© 2017. The American Astronomical Society. All rights reserved. The detection of high-redshift (z > 3) blazars enables the study of the evolution of the most luminous relativistic jets over cosmic time. More importantly, high-redshift blazars tend to host massive black holes and can be used to constrain the space density of heavy black holes in the early universe. Here, we report the first detection with the Fermi-Large Area Telescope of five γ-ray-emitting blazars beyond z = 3.1, more distant than any blazars previously detected in γ-rays. Among these five objects, NVSS J151002+570243 is now the most distant known γ-ray-emitting blazar at z = 4.31. These objects have steeply falling γ-ray spectral energy distributions (SEDs), and those that have been observed in X-rays have a very hard X-ray spectrum, both typical of powerful blazars. Their Compton dominance (ratio of the inverse Compton to synchrotron peak luminosities) is also very large (>20). All of these properties place these objects among the most extreme members of the blazar population. Their optical spectra and the modeling of their optical-UV SEDs confirm that these objects harbor massive black holes (MBH ∼ 10 8-10 Mo ). We find that, at z ≈ 4, the space density of >109 Mo black holes hosted in radio-loud and radio-quiet active galactic nuclei are similar, implying that radio-loudness may play a key role in rapid black hole growth in the early universe.

Keyword(s)

Earth and Planetary Sciences

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/42507

Collections

Scopus 2016-2017