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

Record type: Article

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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Citation

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).

More information

Published date: 13 January 2012
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 337394
URI: http://eprints.soton.ac.uk/id/eprint/337394
ISSN: 0036-8075
PURE UUID: 5c119ce2-f725-404f-9c85-742e41fd7800
ORCID for M.J. Coe: ORCID iD orcid.org/0000-0002-0763-8547

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Date deposited: 25 Apr 2012 11:03
Last modified: 18 Jul 2017 06:03

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Contributors

Author: Fermi LAT Consortium
Author: M.J. Coe ORCID iD
Author: F. di Mille
Author: P.G. Edwards
Author: M. Filopovic
Author: J.L. Payne
Author: J. Stevens
Author: M. Torres

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