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

Author(s): Skilton J. L., Pandey-Pommier M., Hinton J. A., Cheung C. C., Aharonian F. A., Brucker J., Dubus G., Fiasson A., Funk S., Gallant Y., Marcowith A., Reimer O.

(Article) Published: Monthly Notices Of The Royal Astronomical Society, vol. 399 p.317 - 322 (2009)
Links openAccess full text : arxiv


Ref HAL: hal-00398778_v1
Ref Arxiv: 0906.3411
DOI: 10.1111/j.1365-2966.2009.15272.x
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
35 citations
Abstract:

The few known gamma-ray binary systems are all associated with variable radioand X-ray emission. The TeV source HESS J0632+057, apparently associated withthe Be star MWC148, is plausibly a new member of this class. Following theidentification of a variable X-ray counterpart to the TeV source we conductedGMRT and VLA observations in June-September 2008 to search for the radiocounterpart of this object. A point-like radio source at the position of thestar is detected in both 1280 MHz GMRT and 5 GHz VLA observations, with anaverage spectral index, alpha, of ~0.6. In the VLA data there is significantflux variability on ~month timescales around the mean flux density of ~0.3 mJy.These radio properties (and the overall spectral energy distribution) areconsistent with an interpretation of HESS J0632+057 as a lower power analogueof the established gamma-ray binary systems.