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Pulsar Population Overview: Observed Sample and Current/Future Searches

This overview provides information on the observed sample of pulsars with spin frequencies greater than 10 Hz, including normal pulsars and recycled objects. It also discusses current and future searches conducted at Arecibo, GBT, and SKA. The population analysis, Galactic disk MSP population model, and upcoming surveys are highlighted.

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Pulsar Population Overview: Observed Sample and Current/Future Searches

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  1. Pulsar population overview Dunc Lorimer (WVU) November 2, 2006 The observed sample Spin frequencies > 10 Hz - normal pulsars - recycled objects Current/future searches - Arecibo - GBT - SKA

  2. The observed pulsar sample

  3. The observed pulsar sample

  4. The observed pulsar sample

  5. The observed pulsar sample

  6. The observed pulsar sample

  7. The observed pulsar sample

  8. How complete is the sample?

  9. Pulsars with f > 10 Hz • Over 200 currently known • Half of these are in globular clusters • Mostly recycled objects in binary systems • Some young, normal pulsars cf. Crab • Several double neutron star binaries • 0737-3039A (Burgay et al. 2003) • 1829+2456 (Champion et al. 2004) • 1756-2251 (Faulkner et al. 2004)

  10. f > 10 Hz: normal pulsars • Several new PSR-SNR pairs • J0205+6449 in 3C58, P = 65.7 ms (Murray et al. 2002; Camilo et al. 2002) • J1833-1034 in G21.5-0.9, P = 61.8 ms (Camilo et al. 2006) These are faint radio pulsars at distances of several kpc.

  11. f > 10 Hz: normal pulsars Lorimer et al. (2006) Approximately 2.5% of all normal pulsars have f > 10 Hz

  12. f > 10 Hz: globular clusters Record holder is Ter5ad with f=716 Hz (Hessels et al 2006) Population analysis of new sample required.

  13. f > 10 Hz: Galactic disk

  14. MSP population model Work in progress using Parkes surveys… • Current population has 20,000 MSPs • Predict ~900 MSPs with d < 3 kpc

  15. Current and future surveys Arecibo - ALFA (1.4 GHz) Green Bank - Pband - 350 MHz

  16. Current and future surveys • Arecibo • P-ALFA survey • 35 new PSRs Cordes et al. (2006) • Green Bank • 350 MHz survey • ~dozen new PSRs

  17. 200 new MSPs expected!

  18. Looking further ahead

  19. A pulsar survey with SKA By 2020… ~complete sample >20,000 normal PSRs several thousand MSPs 10s of DNS binaries? PSR-BH binary? Meeting at CfA tomorrow All are welcome to attend

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