Kavli Affiliate: Roger W. Romani
| First 5 Authors: Martijn de Vries, Roger W. Romani, , ,
| Summary:
New X-ray and optical observations shed light on the remarkable X-ray
filament of the Gamma-ray pulsar PSR~J2030+4415. Images of the associated
H$alpha$ bow shock’s evolution over the past decade compared with its velocity
structure provide an improved kinematic distance of $sim$0.5kpc. These
velocities also imply that the pulsar spin axis lies $sim 15^circ$ from the
proper motion axis which is close to the plane of the sky. The multi-bubble
shock structure indicates that the bow shock stand-off was compressed to a
small value $sim 20-30$y ago when the pulsar broke through the bow shock to
its present bubble. This compression allowed multi-TeV pulsar $e^pm$ to escape
to the external ISM, lighting up an external magnetic field structure as the
`filament’. The narrow filament indicates excellent initial confinement and the
full $15^prime$ ($2.2$~pc=7~lt-y) projected length of the filament indicates
rapid $e^pm$ propagation to its end. Spectral variation along the filament
suggests that the injected particle energy evolved during the break-through
event.
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