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Pulsar population overview

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Several new PSR-SNR pairs. J0205 6449 in 3C58, P = 65.7 ms ... 10s of DNS binaries? PSR-BH binary? Meeting at CfA tomorrow. All are welcome to attend ... – PowerPoint PPT presentation

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Title: Pulsar population overview


1
Pulsar population overview Dunc Lorimer
(WVU) November 2, 2006 The observed
sample Spin frequencies gt 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 gt 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)
  • 18292456 (Champion et al. 2004)
  • 1756-2251 (Faulkner et al. 2004)

10
f gt 10 Hz normal pulsars
  • Several new PSR-SNR pairs
  • J02056449 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 gt 10 Hz normal pulsars
Lorimer et al. (2006)
Approximately 2.5 of all normal pulsars have f gt
10 Hz
12
f gt 10 Hz globular clusters
Record holder is Ter5ad with f716 Hz (Hessels et
al 2006) Population analysis of new sample
required.
13
f gt 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 lt 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 gt20,000 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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