Other
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1613n&link_type=abstract
American Astronomical Society, HEAD meeting #11, #16.13; Bulletin of the American Astronomical Society, Vol. 41, p.680
Other
Scientific paper
We report radio polarization observations of G319.9-0.7 at 3 and 6cm obtained from the Australia Telescope Compact Array. The source exhibits a highly elongated morphology with the energetic pulsar J1509-5850 located at the tip, a flat radio spectrum of index α=-0.26±0.04 and a high degree of linear polarization over 30%. All these confirm that the source is a radio bow-shock nebula associated with PSR J1509-5850. The polarization maps suggest a helical magnetic field structure with the symmetry axis parallel to the pulsar's inferred direction of motion. This is the first time such a field geometry is found in a bow-shock nebula, and it may be the result of an alignment between the pulsar spin axis and space velocity. As compared to other bow-shock PWN examples, G319.9-0.7 shows very different field structure and surface brightness distribution, illustrating the large diversity of the population.
Chatterjee Saikat
Gaensler Bryan M.
Johnston Scott
Ng Chi-Yung
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