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Accession Number
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N20120014293
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Title
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Periodic Emission from the Gamma-ray Binary 1FGL J1018.6-5856.
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Publication Date
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Jan 2012
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Media Count
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34p
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Personal Author
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A. K. Harding D. Donato D. J. Thompson E. Hays E. Troja E. C. Ferrara J. E. McEnery N. Gehrels O. Celic R. H. D. Corbet
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Abstract
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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 IFGL JI018.6-5856 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 06V f) star optical counterpart and a radio counterpart that is also apparently modulated on the orbital period. IFGL 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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Keywords
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Binary stars
Data processing
Emission spectra
Fermi gamma-ray space telescope
Gamma rays
Light curve
Power spectra
Radio observation
Spectral counterparts(Astronomy)
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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54B - Astronomy & Celestial Mechanics
84A - Astronautics
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Corporate Author
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Goddard Space Flight Center, Greenbelt, MD.
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Document Type
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Journal article
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Title Note
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N/A
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NTIS Issue Number
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1307
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Contract Number
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N/A
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