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Title: High-energy Gamma-Ray Activity from V404 Cygni Detected by AGILE during the 2015 June Outburst

Abstract

The AGILE satellite detected transient high-energy γ -ray emission from the X-ray binary V404 Cygni, during the 2015 June outburst observed in radio, optical, X-ray, and soft γ -ray frequencies. The activity was observed by AGILE in the 50–400 MeV energy band, between 2015 June 24 UT 06:00:00 and 2015 June 26 UT 06:00:00 (MJD 57197.25–57199.25), with a detection significance of ∼4.3 σ . The γ -ray detection, consistent with a contemporaneous observation by Fermi -LAT, is correlated with a bright flare observed at radio and hard X-ray frequencies, and with a strong enhancement of the 511 keV line emission, possibly indicating plasmoid ejections in a lepton-dominated transient jet. The AGILE observations of this binary system are compatible with a microquasar scenario in which transient jets are responsible for the high-energy γ -ray emission.

Authors:
; ;  [1];  [2];  [3]
  1. INAF-IAPS, Via del Fosso del Cavaliere 100, I-00133 Roma (Italy)
  2. ASI Data Center (ASDC), Via del Politecnico snc, I-00133 Roma (Italy)
  3. Special Astrophysical Observatory RAS, Karachaevo-Cherkassian Republic, Nizhnij Arkhyz 36916 (Russian Federation)
Publication Date:
OSTI Identifier:
22663703
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 839; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BINARY STARS; BLACK HOLES; COSMIC GAMMA BURSTS; COSMIC GAMMA SOURCES; EMISSION; GAMMA DETECTION; GAMMA RADIATION; HARD X RADIATION; KEV RANGE; LEPTONS; MEV RANGE; PLASMOIDS; SATELLITES; STARS

Citation Formats

Piano, G., Munar-Adrover, P., Tavani, M., Verrecchia, F., and Trushkin, S. A., E-mail: giovanni.piano@iaps.inaf.it. High-energy Gamma-Ray Activity from V404 Cygni Detected by AGILE during the 2015 June Outburst. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA6796.
Piano, G., Munar-Adrover, P., Tavani, M., Verrecchia, F., & Trushkin, S. A., E-mail: giovanni.piano@iaps.inaf.it. High-energy Gamma-Ray Activity from V404 Cygni Detected by AGILE during the 2015 June Outburst. United States. doi:10.3847/1538-4357/AA6796.
Piano, G., Munar-Adrover, P., Tavani, M., Verrecchia, F., and Trushkin, S. A., E-mail: giovanni.piano@iaps.inaf.it. Thu . "High-energy Gamma-Ray Activity from V404 Cygni Detected by AGILE during the 2015 June Outburst". United States. doi:10.3847/1538-4357/AA6796.
@article{osti_22663703,
title = {High-energy Gamma-Ray Activity from V404 Cygni Detected by AGILE during the 2015 June Outburst},
author = {Piano, G. and Munar-Adrover, P. and Tavani, M. and Verrecchia, F. and Trushkin, S. A., E-mail: giovanni.piano@iaps.inaf.it},
abstractNote = {The AGILE satellite detected transient high-energy γ -ray emission from the X-ray binary V404 Cygni, during the 2015 June outburst observed in radio, optical, X-ray, and soft γ -ray frequencies. The activity was observed by AGILE in the 50–400 MeV energy band, between 2015 June 24 UT 06:00:00 and 2015 June 26 UT 06:00:00 (MJD 57197.25–57199.25), with a detection significance of ∼4.3 σ . The γ -ray detection, consistent with a contemporaneous observation by Fermi -LAT, is correlated with a bright flare observed at radio and hard X-ray frequencies, and with a strong enhancement of the 511 keV line emission, possibly indicating plasmoid ejections in a lepton-dominated transient jet. The AGILE observations of this binary system are compatible with a microquasar scenario in which transient jets are responsible for the high-energy γ -ray emission.},
doi = {10.3847/1538-4357/AA6796},
journal = {Astrophysical Journal},
number = 2,
volume = 839,
place = {United States},
year = {Thu Apr 20 00:00:00 EDT 2017},
month = {Thu Apr 20 00:00:00 EDT 2017}
}