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The radio counterpart of the likely TeV binary HESS J0632+057

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journal contribution
posted on 24.10.2012, 09:09 by J. L. Skilton, J. A. Hinton, M. Pandey-Pommier, C. C. Cheung, F. A. Aharonian, J. Brucker, G. Dubus, A. Fiasson, Y. Gallant, A. Marcowith, S. Funk, O. Reimer
The few known γ-ray binary systems are all associated with variable radio and X-ray emission. The TeV source HESS J0632+057, apparently associated with the Be star MWC 148, is plausibly a new member of this class. Following the identification of a variable X-ray counterpart to the TeV source we conducted Giant Metrewave Radio Telescope (GMRT) and Very Large Array (VLA) observations in 2008 June–September to search for the radio counterpart of this object. A point-like radio source at the position of the star is detected in both 1280-MHz GMRT and 5-GHz VLA observations, with an average spectral index, α, of ∼0.6. In the VLA data there is significant flux variability on ∼month time-scales around the mean flux density of ≈0.3 mJy. These radio properties (and the overall spectral energy distribution) are consistent with an interpretation of HESS J0632+057 as a lower power analogue of the established γ-ray binary systems.

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Citation

Monthly Notices of the Royal Astronomical Society, 2009, 399 (1), pp. 317-322

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Oxford University Press (OUP)

issn

0035-8711

eissn

1365-2966

Copyright date

2009

Available date

24/10/2012

Publisher version

http://mnras.oxfordjournals.org/content/399/1/317

Language

en

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