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), 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.
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Physical Sciences and Engineering > Physics and Astronomy > Astronomy Group
|Date Deposited:||25 Apr 2012 11:03|
|Last Modified:||10 May 2012 12:37|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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