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Title: A luminous gamma-ray binary in the large magellanic cloud

Journal Article · · The Astrophysical Journal (Online)
 [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [5];  [6];  [7];  [8];  [6]; ORCiD logo [2];  [9];  [10]
  1. Univ. of Maryland Baltimore County (UMBC), Baltimore, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Maryland Inst. College of Art, Baltimore, MD (United States)
  2. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
  3. Univ. of Southampton (United Kingdom). School of Physics and Astronomy
  4. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  5. Univ. of Grenoble (France). Inst. of Planetology nad Astrophysics
  6. Commonwealth Scientific and Industrial Research Organization Astronomy and Space Science, New South Wales (Australia)
  7. Univ. of Toulouse (France). Inst. of Astrophysical Research and Planetology
  8. Univ. of Cape Town (South Africa). Dept. of Astronomy; South African Astronomical Observatory (South Africa)
  9. Univ. of Cape Town (South Africa). Dept. of Astronomy
  10. Warsaw Univ. Observatory (Poland)

Gamma-ray binaries consist of a neutron star or a black hole interacting with a normal star to produce gamma-ray emission that dominates the radiative output of the system. Previously, only a handful of such systems have been discovered, all within our Galaxy. We report the discovery of a luminous gamma-ray binary in the Large Magellanic Cloud, found with the Fermi Large Area Telescope (LAT), from a search for periodic modulation in all sources in the third Fermi LAT catalog. This is the first such system to be found outside the Milky Way. Furthermore, the system has an orbital period of 10.3 days, and is associated with a massive O5III star located in the supernova remnant DEM L241, previously identified as the candidate high-mass X-ray binary (HMXB) CXOU J053600.0–673507. X-ray and radio emission are also modulated on the 10.3 day period, but are in anti-phase with the gamma-ray modulation. Optical radial velocity measurements suggest that the system contains a neutron star. The source is significantly more luminous than similar sources in the Milky Way, at radio, optical, X-ray, and gamma-ray wavelengths. The detection of this extra-galactic system, but no new Galactic systems, raises the possibility that the predicted number of gamma-ray binaries in our Galaxy has been overestimated, and that HMXBs may be born containing relatively slowly rotating neutron stars.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1355709
Journal Information:
The Astrophysical Journal (Online), Vol. 829, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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Cited By (23)

Minimum Spanning Tree cluster analysis of the LMC region above 10 GeV: detection of the SNRs N 49B and N 63A journal June 2018
Modelling Jets, Tori and Flares in Pulsar Wind Nebulae journal March 2017
Phenomenology of gamma-ray emitting binaries journal February 2019
Detection of variable VHE γ -ray emission from the extra-galactic γ -ray binary LMC P3 journal February 2018
Refining the origins of the gamma-ray binary 1FGL J1018.6–5856 journal November 2018
Overview of non-transient γ -ray binaries and prospects for the Cherenkov Telescope Array journal November 2019
Modelling the interaction between relativistic and non-relativistic winds in binary pulsar systems: strong magnetization of the pulsar wind journal October 2019
Discovery of a very young high-mass X-ray binary associated with the supernova remnant MCSNR J0513-6724 in the LMC journal October 2019
The orbital parameters of the gamma-ray binary LMC P3† journal January 2019
GeV Detection of HESS J0632+057 journal September 2017
The Hour-timescale GeV Flares of PSR B1259–63 in 2017 journal August 2018
A Luminous and Highly Variable Gamma-Ray Flare Following the 2017 Periastron of PSR B1259–63/LS 2883 journal August 2018
Discovery of the Galactic High-mass Gamma-Ray Binary 4FGL J1405.1−6119 journal October 2019
Multiscale Time- and Frequency-domain Likelihood Analysis with Photon Weights journal November 2019
Discovery of the Galactic High-Mass Gamma-ray Binary 4FGL J1405.1-6119 collection January 2019
Modelling Jets, Tori and Flares in Pulsar Wind Nebulae text January 2017
Detection of variable VHE gamma-ray emission from the extra-galactic gamma-ray binary LMC P3 text January 2018
A Luminous and Highly-variable Gamma-ray Flare Following the 2017 Periastron of PSR B1259-63/LS 2883 text January 2018
Minimum Spanning Tree cluster analysis of the LMC region above 10 GeV: detection of the SNRs N 49B and N 63A text January 2018
The orbital parameters of the gamma-ray binary LMC P3 text January 2019
Phenomenology of gamma-ray emitting binaries preprint January 2019
Overview of non-transient gamma-ray binaries and prospects for the Cherenkov Telescope Array text January 2019
Modelling the interaction between relativistic and non-relativistic winds in binary pulsar systems: strong magnetization of the pulsar wind text January 2019

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