The Puzzling Pulsar-Wind Nebula of the Geminga Pulsar

Details The Puzzling Pulsar-Wind Nebula of the Geminga Pulsar The Puzzling Pulsar-Wind Nebula of the Geminga Pulsar

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2162p&link_type=abstract

Chandra Proposal ID #08500140

Physics

Chandra Proposal Id #08500140

Scientific paper

XMM and Chandra observations have shown a unique structure around the Geminga pulsar. The XMM images show two 2'-long, patchy tails extended in the direction opposite to the pulsar's proper motion. Our observation with Chandra ACIS revealed a 20''-long axial tail behind the moving pulsar and an arc-like structure 5''-7'' ahead of the pulsar. The tail could be a pulsar jet or a shocked pulsar wind confined by the ram pressure of the oncoming medium. The arc could be the head of a bow shock or a torus of the shocked equatorial pulsar wind. In the shallow ACIS image there is no clear connection between these small-scale structures and the long tails seen in the XMM images. The proposed deep observation will establish this connection and allow us to understand the nature of the whole nebula.

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