Recently, researchers from the Xinjiang Astronomical Observatory of the Chinese Academy of Sciences used the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) to search for pulsars in five supernova remnants. They found a new pulsar potentially associated with one of the supernova remnants G29.6+0.1.
Searching for radio pulsars in supernova remnants is crucial for studying the formation of pulsars and the mechanisms of supernova explosions. In the standard evolutionary model, pulsars are neutron stars formed in the supernova explosion of intermediate-mass stars. At present, less than one-third of the 383 known supernova remnants have been confirmed to be associated with pulsars.
In this study, researchers analyzed the high-sensitivity observational data from the FAST using the PRESTO software. They discovered a new pulsar, PSR J1845–0306, with a spin period of P = 983.6 ms and a dispersion measure of DM = 444.6 ± 2.0 cm-3 pc, in the direction of the supernova remnant G29.6+0.1. The distance to the pulsar was estimated using the YMW16 electron density model.
The results suggested that this pulsar is possibly associated with the supernova remnant (Due to their proximity, the pulsar may have been born from the supernova explosion). The association between them needs to be further confirmed by follow-up observations to determine key parameters of the pulsar, such as age and proper motion.
The Tibet ASgamma experiment, a China-Japan joint research project, has detected that a supernova remnant may be the source of some ultrahigh-energy cosmic rays. The researchers said that their work showed SNR G106.3+2.7 is a potential PeVatron in our galaxy, a big step i...
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