Periodic emission from the gamma-ray binary 1FGL J1018.6-5856

Consortium, Fermi LAT, Coe, M.J., di Mille, F., Edwards, P.G., Filopovic, M., Payne, J.L., Stevens, J. and Torres, M. (2012) Periodic emission from the gamma-ray binary 1FGL J1018.6-5856 Science, 335, (6065), pp. 189-193. (doi:10.1126/science.1213974).


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Gamma-ray binaries are stellar systems containing a neutron star or black hole with gamma-ray emission produced by an interaction between the components. These systems are rare, even though binary evolution models predict dozens in our Galaxy. A search for gamma-ray binaries with the Fermi Large Area Telescope (LAT) shows that 1FGL J1018.6-5856 exhibits intensity and spectral modulation with a 16.6 day period. We identified a variable X-ray counterpart, which shows a sharp maximum coinciding with maximum gamma-ray emission, as well as an O6V((f)) star optical counterpart and a radio counterpart that is also apparently modulated on the orbital period. 1FGL J1018.6-5856 is thus a gamma-ray binary, and its detection suggests the presence of other fainter binaries in the Galaxy.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1126/science.1213974
ISSNs: 0036-8075 (print)
Related URLs:
Organisations: Astronomy Group
ePrint ID: 337394
Date :
Date Event
13 January 2012Published
Date Deposited: 25 Apr 2012 11:03
Last Modified: 17 Apr 2017 17:16
Further Information:Google Scholar

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