A Radio Study of the Mouse, G359.23--0.82

Abstract

The recent detection of a young pulsar powering ``the Mouse'', G359.23--0.82, as well as detailed imaging of surrounding nebular X-ray emission, have motivated us to investigate the structural details and polarization characteristics of the radio emission from this axisymmetric source with a supersonic bow shock. Using polarization data at 3.6 and 6cm, we find that the magnetic field wraps around the bow shock structure near the apex of the system, but downnstream runs parallel to the inferred direction of the pulsar's motion. The rotation measure (RM) distribution of the Mouse also suggests that the low degree of polarization combined with a high RM ahead of the pulsar result from internal plasma within the bowshock region. In addition, using sub-arcsecond radio image of the Mouse, we identify modulations in the brightness distribution of the Mouse that may be associated with the unshocked pulsar wind behind the pulsar. Lastly, we discuss the relationship between the Mouse and its neighboring shell-type supernova remnant G359.1--0.5 and argue that these two sources could potentially have the same origin.

8 pages, 7 figures, in Cospar 2004 session E1.4; editors: Cara Rakowski and Shami Chatterjee; "Young Neutron Stars and Supernova Remnants", publication: Advances in Space Research (in press)

References in corpus (4)

• A $\lambda$20cm Survey of the Galactic Center Region I: Detection of Numerous Linear Filaments
• The Mouse That Soared: High Resolution X-ray Imaging of the Pulsar-Powered Bow Shock G359.23-0.82
• Systematic bias in interstellar magnetic field estimates
• Heartbeat of the Mouse: a young radio pulsar associated with the axisymmetric nebula G359.23-0.82

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