The Duck Redux: An Improved Proper Motion Upper Limit for the Pulsar B1757-24 Near the Supernova Remnant G5.4-1.2

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dc.creatorBlazek, J. A.
dc.creatorGaensler, B. M.
dc.creatorChatterjee, S.
dc.creatorvan der Swaluw, E.
dc.creatorCamilo, F.
dc.creatorStappers, B. W.
dc.date2005-12-05
dc.date2006-07-26
dc.date.accessioned2026-07-07T10:43:27Z
dc.date.available2026-07-07T10:43:27Z
dc.description"The Duck" is a complicated non-thermal radio system, consisting of the energetic radio pulsar B1757-24, its surrounding pulsar wind nebula G5.27-0.90 and the adjacent supernova remnant (SNR) G5.4-1.2. PSR B1757-24 was originally claimed to be a young (~15 000 yr) and extreme velocity (>~1500 km/s) pulsar which had penetrated and emerged from the shell of the associated SNR G5.4-1.2, but recent upper limits on the pulsar's motion have raised serious difficulties with this interpretation. We here present 8.5 GHz interferometric observations of the nebula G5.27-0.90 over a 12-year baseline, doubling the time-span of previous measurements. These data correspondingly allow us to halve the previous upper limit on the nebula's westward motion to 14 milliarcseconds/yr (5-sigma), allowing a substantive reevaluation of this puzzling object. We rule out the possibility that the pulsar and SNR were formed from a common supernova explosion ~15 000 yrs ago as implied by the pulsar's characteristic age, but conclude that an old (>~70 000 yr) pulsar / SNR association, or a situation in which the pulsar and SNR are physically unrelated, are both still viable explanations.
dc.description9 pages, including 1 color and 1 B/W figure. Minor changes following referee's report. ApJ, in press
dc.identifierhttps://arxiv.org/abs/astro-ph/0512128
dc.identifierhttp://arxiv.org/abs/astro-ph/0512128
dc.identifierAstrophys.J.652:1523-1530,2006
dc.identifierdoi:10.1086/507938
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182247
dc.subjectAstrophysics
dc.titleThe Duck Redux: An Improved Proper Motion Upper Limit for the Pulsar B1757-24 Near the Supernova Remnant G5.4-1.2
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