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PSR B1951+32: A Bow Shock-Confined X-ray Nebula, a Synchrotron Knot and an Optical Counterpart Candidate | D.-S. Moon
; J.-J. Lee
; S. S. Eikenberry
; B.-C. Koo
; S. Chatterjee
; D. L. Kaplan
; J. J. Hester
; J. M. Cordes
; Y. A. Gallant
; L. Koch-Miramond
; | Date: |
9 Jun 2004 | Journal: | Astrophys.J. 610 (2004) L33-L36 | Subject: | astro-ph | Affiliation: | Caltech), J.-J. Lee (SNU), S. S. Eikenberry (U. Florida), B.-C. Koo (SNU), S. Chatterjee (NRAO), D. L. Kaplan (Caltech), J. J. Hester (Arizona S.), J. M. Cordes (Cornell), Y. A. Gallant (Montpellier), L. Koch-Miramond (DAPNIA/CEA, Saclay | Abstract: | The radio pulsar B1951+32 and the supernova remnant CTB 80 provide a rich laboratory for the study of neutron stars and supernova remnants. Here, we present ground-based optical and near-infrared observations of them, along with X-ray observations with Chandra and a re-analysis of archival data obtained with the Hubble Space Telescope. The X-ray observations reveal a cometary pulsar wind nebula which appears to be confined by a bow shock produced by high-velocity motion of the pulsar, making PSR B1951+32 a rare pulsar exhibiting both an H alpha bow shock and a shocked X-ray pulsar wind nebula. The distribution of H alpha and radio continuum emission is indicative of a contact discontinuity of the shocked pulsar winds and shocked ambient medium at ~0.05 pc. On the other hand, the optical synchrotron knot of PSR B1951+32 likely has a flat spectrum in the optical and near-infrared wavebands, and our astrometry is consistent with only one of the two reported optical counterpart candidates for the pulsar. | Source: | arXiv, astro-ph/0406240 | Services: | Forum | Review | PDF | Favorites |
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