Chandreyee Maitra (MPE): A multi-wavelength view of the intriguing pulsar wind nebula around PSR J0855-4644

Seminar | July 23 | 3:10-4 p.m. | 501B Campbell Hall

 Chandreyee Maitra, MPE

 Radio Astronomy Lab

We present results from X-ray and radio observations of the region surrounding PSR J0855-4644. PSR J0855-4644 is a nearby, fast spinning, and energetic radio pulsar in the south-eastern rim of the supernova remnant RX J0852.0-4622. X-ray observations with XMM Newton have shown an arcmin scale extended emission, the pulsar wind nebula (PWN), around the X-ray counterpart of the pulsar. Recent Chandra observations have revealed a further compact PWN (arcsecond scale) associated with the pulsar showing a possible double ’torus+jet ’morphology.

This makes it only the third source of its kind, and being a nearby object provides us the golden opportunity to investigate the physics of equatorial and polar outflows in PWNe. We use the double torus PWN morphology and the radio light curve to constrain the geometry of the pulsar. Further using radio observations with the upgraded GMRT we have discovered the radio counterpart of the PWN exhibiting a bow shock morphology. We model the radio PWN to build a complete picture of the energetics and the magnetic field strength of the PWN surrounding PSR J0855-4644.

 scroft@berkeley.edu