skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: FLARING PATTERNS IN BLAZARS

Abstract

Blazars radiate from relativistic jets launched by a supermassive black hole along our line of sight; the subclass of flat spectrum radio quasars exhibits broad emission lines, a telltale sign of a gas-rich environment and high accretion rate, contrary to the other subclass of the BL Lacertae objects. We show that this dichotomy of the sources in physical properties is enhanced in their flaring activity. The BL Lac flares yielded spectral evidence of being driven by further acceleration of highly relativistic electrons in the jet. Here, we discuss spectral fits of multi-{lambda} data concerning strong flares of the two flat spectrum radio quasars 3C 454.3 and 3C 279 recently detected in {gamma}-rays by the AGILE and Fermi satellites. We find that optimal spectral fits are provided by external Compton radiation enhanced by increasing production of thermal seed photons by growing accretion. We find such flares to trace patterns on the jet-power-electron-energy plane that diverge from those followed by flaring BL Lac objects and discuss why these occur.

Authors:
; ;  [1]; ;  [2]
  1. Dipartimento di Fisica, Universita di Roma 'Tor Vergata', Via della Ricerca Scientifica 1, I-00133 Roma (Italy)
  2. INAF/IASF-Roma, Via Fosso del Cavaliere 1, I-00100 Roma (Italy)
Publication Date:
OSTI Identifier:
21578241
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 736; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/736/2/128; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; BL LACERTAE OBJECTS; BLACK HOLES; ELECTRONS; EMISSION; GALAXIES; GAMMA RADIATION; QUASARS; COSMIC RADIO SOURCES; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; FERMIONS; IONIZING RADIATIONS; LEPTONS; RADIATIONS

Citation Formats

Paggi, A., Cavaliere, A., Tavani, M., Vittorini, V., and D'Ammando, F., E-mail: paggi@roma2.infn.it. FLARING PATTERNS IN BLAZARS. United States: N. p., 2011. Web. doi:10.1088/0004-637X/736/2/128.
Paggi, A., Cavaliere, A., Tavani, M., Vittorini, V., & D'Ammando, F., E-mail: paggi@roma2.infn.it. FLARING PATTERNS IN BLAZARS. United States. doi:10.1088/0004-637X/736/2/128.
Paggi, A., Cavaliere, A., Tavani, M., Vittorini, V., and D'Ammando, F., E-mail: paggi@roma2.infn.it. Mon . "FLARING PATTERNS IN BLAZARS". United States. doi:10.1088/0004-637X/736/2/128.
@article{osti_21578241,
title = {FLARING PATTERNS IN BLAZARS},
author = {Paggi, A. and Cavaliere, A. and Tavani, M. and Vittorini, V. and D'Ammando, F., E-mail: paggi@roma2.infn.it},
abstractNote = {Blazars radiate from relativistic jets launched by a supermassive black hole along our line of sight; the subclass of flat spectrum radio quasars exhibits broad emission lines, a telltale sign of a gas-rich environment and high accretion rate, contrary to the other subclass of the BL Lacertae objects. We show that this dichotomy of the sources in physical properties is enhanced in their flaring activity. The BL Lac flares yielded spectral evidence of being driven by further acceleration of highly relativistic electrons in the jet. Here, we discuss spectral fits of multi-{lambda} data concerning strong flares of the two flat spectrum radio quasars 3C 454.3 and 3C 279 recently detected in {gamma}-rays by the AGILE and Fermi satellites. We find that optimal spectral fits are provided by external Compton radiation enhanced by increasing production of thermal seed photons by growing accretion. We find such flares to trace patterns on the jet-power-electron-energy plane that diverge from those followed by flaring BL Lac objects and discuss why these occur.},
doi = {10.1088/0004-637X/736/2/128},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 736,
place = {United States},
year = {2011},
month = {8}
}