Discovery of an Old, Nearby, and Overlooked Supernova Remnant Centered on the Southern Constellation Antlia Pneumatica
2002; IOP Publishing; Volume: 576; Issue: 1 Linguagem: Inglês
10.1086/343100
ISSN1538-4357
AutoresP. R. McCullough, Brian D. Fields, V. Pavlidou,
Tópico(s)Pulsars and Gravitational Waves Research
ResumoWe report the discovery of a supernova remnant (SNR) with an angular diameter of 24°, centered on the southern constellation Antlia Pneumatica. The SNR is detected well in Hα and X-rays. Within the Antlia SNR's outline, a marginally significant feature is detected in the 1.8 MeV gamma-ray line of the radioisotope 26Al. At an estimated distance dA ≃ 60-340 pc, the Antlia SNR is perhaps the nearest SNR except for the Local Bubble. Consequently, any associated neutron star or black hole is expected to have a large proper motion. Of the trajectories of nearby pulsars with well-determined proper motions, only B0950+08's passes within the SNR outline. If the SNR and the pulsar B0950+08 indeed both originated from the same supernova, then their age t = 1.8(dA/100 pc) Myr.
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