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Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hst..prop10601l&link_type=abstract
HST Proposal ID #10601
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Hst Proposal Id #10601 Hot Stars
Scientific paper
We wish to pin down the proper motion of the Crab-like pulsar PSR B0540-69.3. HST/WFPC2 archival data have an epoch separation by 4 years which we have already used to obtain a very high transverse velocity, 1190 +/- 560 km/s. The indicated direction of the proper motion is consistent with it being along the southern jet of the pulsar wind nebula. The high velocity could be linked to the high asymmetry of the supernova ejecta, which suggests a highly asymmetric supernova explosion. We need a third epoch of HST imaging to test our present 2-sigma limit. With the suggested observation we will obtain a 1-sigma limit on the transverse motion better than 200 km/s. PSR B0540-69.3 could be the third young pulsar connected to a supernova remnant for which a proper motion is established. The other two are the Crab and Vela pulsars. Both these pulsars have their proper motions aligned with the jet axis of their pulsar wind nebulae. PSR B0540-69.3 could thus be the third object {of three} to reveal that it shares this property. This would provide vital information to supernova explosion and pulsar kick models. PSR B0540-69.3 would undoubtedly also be the most distant pulsar ever for which a proper motion is established.
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