Unusual interaction of the high-velocity pulsar PSR1757 - 24 with the supernova remnant G5.4 - 1.2

Details Unusual interaction of the high-velocity pulsar PSR1757 - 24 with the supernova remnant G5.4 - 1.2 Unusual interaction of the high-velocity pulsar PSR1757 - 24 with the supernova remnant G5.4 - 1.2

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.352..785f&link_type=abstract

Nature (ISSN 0028-0836), vol. 352, Aug. 29, 1991, p. 785-787. Research supported by Perkin Fund.

Astronomy and Astrophysics

Astronomy

114

Pulsars, Radio Sources (Astronomy), Reflection Nebulae, Stellar Envelopes, Supernova Remnants, Interstellar Extinction, Magnetic Field Configurations, Radio Emission, Very Large Array (Vla)

Scientific paper

High-resolution observations of the galactic radio source G5.4 - 1.2 with the VLA are reported which reveal a compact, highly polarized, flat-spectrum radio nebula on the western edge of G5.4 - 1.2. The presence of a 125-ms pulsar, PSR1757 - 24, associated with the radio source and located near the center of the newly discovered nebula, is confirmed. It is argued that this pulsar is associated with G5.4 - 1.2, which is identified as an SNR, and that it was born with a high enough velocity for it to overtake the decelerating supernova shell, creating the peripheral radio nebula. The fortuitous near-concidence of the pulsar velocity with the shell velocity accounts for the unusual overall shape of the remnant. If the large velocity of the pulsar is confirmed by future observations of its proper motion, the possibility of an asymmetric supernova explosion must be taken seriously, and other previously unsuspected associations between pulsars and SNR may emerge.

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