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

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arxiv 1202.3164 v1 pith:BFHMUEQN submitted 2012-02-14 astro-ph.HE

The Fermi LAT Collaboration: M.J. Coe , F. Di Mille , P.G. Edwards , M.D. Filipović , J.L. Payne , J. Stevens , M.A.P. Torres This is my paper · ORCID
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keywords gamma-raybinariesbinarycounterpartemissionj1018galaxymaximum
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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.

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Cited by 2 Pith papers

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  1. Large-scale emission from gamma-ray binaries: the case of LS 5039

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    The arcminute X-ray emission around LS 5039 is consistently explained as synchrotron radiation from electrons accelerated at the termination shock of the mixed stellar/pulsar wind, with different source ages giving co...

  2. Fermi-LAT and FAST observation of the gamma-ray binary HESS J0632+057

    astro-ph.HE 2025-04 conditional novelty 5.0 of 10

    Fermi-LAT data spanning 15 years yield a power-law GeV spectrum for HESS J0632+057 with a possible 10-100 GeV turnover, and FAST observations set a 2 microJy upper limit on radio pulsations from the system.

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