G359.23-0.92, the Mouse, a pulsar powered bow shock?

Astronomy and Astrophysics – Astronomy

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Bow Waves, Interstellar Matter, Nebulae, Pulsars, Shock Waves, X Ray Sources, Nonthermal Radiation, Radio Astronomy, Relativistic Particles

Scientific paper

We have discovered a faint X-ray object coincident with the head of the 'Mouse' (G359.23-0.82), a member of the rare class of axially symmetric radio nebula. Such objects are believed to be excited by a fast moving central source which supplies relativistic particles that emit the observed non-thermal radiation. The origin of most such objects and the Mouse in particular is obscure. We argue that the Mouse is the wake left by a young pulsar rather than an accreting binary, a popular model for this class. On phenomenological grounds we suggest that the Mouse is similar in some ways to the bow shock of the moderately young pulsar 1951+32 embedded in the supernova remnant CTB80. The rarity of Mouse-like nebulae is puzzling and can only be explained by assuming that most pulsars are in low density media.

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