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Colloquium: Gamma-ray Pulsars with the Fermi Large Area Telescope

Submitter: David Smith
Description: After 15 years on orbit, the Fermi LAT has detected GeV pulsations from 298 pulsars. Another 40 steady catalog sources co-located with pulsars will likely reveal pulsations after timing work. Our 3rd catalog, "3PC", compiles spectral and light curve analysis results in a uniform manner, along with several other properties. The sample is varied, including both millisecond and young pulsars ; radio loud and quiet ones; many with highly perturbed spindowns or orbits and others useful for precision timing ; and a few in globular clusters and the LMC. All have large braking powers, 5e32 < Edot < 5e38 erg/s. The catalog reveals features of the high energy pulsar population: Spectral shapes resemble expectations from synchro-curvature radiation of high energy electrons. Most pulse profiles show 2 peaks, with the one farther from the radio pulse having a harder spectrum. Some of our pulsars have provided neutron star mass measurements ; others usefully constrain the nanohertz gravitational wave background. I will also address prospects for finding yet more pulsars among the >2500 unidentified LAT catalog sources, and the science those discoveries may enable.

The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars, Ap J Supplement (accepted) ">https://arxiv.org/abs/2307.11132

Copyright: Danielle Futselaar (artsource.nl)
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