Population Synthesis of Radio and Gamma-ray Pulsars in the Fermi Era

Details Population Synthesis of Radio and Gamma-ray Pulsars in the Fermi Era Population Synthesis of Radio and Gamma-ray Pulsars in the Fermi Era

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1612g&link_type=abstract

American Astronomical Society, HEAD meeting #11, #16.12; Bulletin of the American Astronomical Society, Vol. 41, p.680

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present results of our pulsar population synthesis of normal and millisecond pulsars from the Galactic disk using our previously developed computer code. On the same footing, we use polar cap/slot gap and outer gap models for gamma-ray emission from normal pulsars to obtain statistics of radio-loud and radio-quiet gamma-ray pulsars. From our studies of radio pulsars that have clearly identifiable core and cone components, in which we fit the polarization sweep as well as the pulse profiles in order to constrain the viewing geometry, we develop a model describing the luminosity and ratio of radio core-to-cone peak fluxes. In this model, short period pulsars are more cone-dominated. We present preliminary results including simulated population statistics that are compared with recent detections by Fermi. With the simulated viewing geometry, pulse profiles, as well as statistics of the gamma-ray peak separation and radio lag relative to the gamma-ray profile, can be obtained and compared with those of Fermi pulsars. We present the simulated diffuse gamma-ray background for normal and millisecond pulsars and estimates of the pulsar densities that may contribute to the local cosmic ray positron flux.
We express our gratitude for the generous support of the Michigan Space Grant Consortium, of the National Science Foundation (REU) and the NASA Astrophysics Theory and Fundamental Program.

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