Periodic Emission from the Gamma-Ray Binary 1FGL J1018.6-5856

Details Periodic Emission from the Gamma-Ray Binary 1FGL J1018.6-5856 Periodic Emission from the Gamma-Ray Binary 1FGL J1018.6-5856

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012sci...335..189f&link_type=abstract

Science, Volume 335, Issue 6065, pp. 189- (2012).

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Scientific paper

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.

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