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

Ackermann, M.

doi:10.1126/science.1213974

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

Journal Article · Thu Jan 12 00:00:00 EST 2012 · Science

DOI:https://doi.org/10.1126/science.1213974· OSTI ID:1356773

Ackermann, M. ^[1]

SLAC National Accelerator Lab., Menlo Park, CA (United States); et al.

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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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Fermi LAT Collaboration

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1356773

Journal Information:: Science, Vol. 335, Issue 6065; ISSN 0036-8075

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 67 works

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