Population synthesis of pulsars in the Milky Way

Population synthesis of pulsars in the Milky Way

Population synthesis of pulsars
in the Milky Way
Marek Cieślar1, Tomasz Bulik1, Stefan Osłowski2,3
1.Astronomical Observatory, University of Warsaw,
Al. Ujazdowskie 4, 00-478 Warsaw, Poland
2.Fakultät für Physik, Universität Bielefeld,
Postfach 100131, 33501 Bielefeld, Germany
3.Max-Planck- Institut für Radioastronomie,
Auf dem Hügel 69, 53121 Bonn, Germany
Model Componenets
(fully computed)
Dynamics
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Galactic potential
Kicks
Initial position in
the Arms
Physics
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P,Pdot,B evolution
(lighthouse model)
B Decay
(exponential)
Death lines
Luminosity model
Observations
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Minimal observable
flux (survey-wise)
DM (NE2001)
Beaming fraction
Survey coverage
MCMC computation
Dynamics
●
●
●
Galactic potential
Kicks
Initial position in
the Arms
Physics
●
●
●
●
P,Pdot,B evolution
(lighthouse model)
B Decay
(exponential)
Death lines
Luminosity model
Observations
●
●
●
●
Minimal observable
flux (survey-wise)
DM (NE2001)
Beaming fraction
Survey coverage
Parameters
Sigma Binit
Mean Binit
Delta
0.4 [Gs]
12.5 [Gs]
10. [Myr]
Parameters
Sigma B
Mean B
Delta
0.4 [Gs]
12.5 [Gs]
10. [Myr]
Parameters:
Pinit
SigmaP
Binit
SigmaB
0.57[s]
0.25[s]
12.9[Gs]
0.6[Gs]
Purpose of the work
●
●
Replicate and enhance work of
Faucher-Giguère & Kaspi, 2006
MCMC workhorse for fun and profit
(hypothesis testing with arbitrary number of
parameters)
●
Population builder for gravitational wave studies
●
Release the POPULATRON in GPL fashion
NE2001
a question
or a problem
or both...
Classic MCMC
Purpose of the work
●
●
Replicate and enhance work of
Faucher-Giguère & Kaspi, 2006
MCMC workhorse for fun and profit
(hypothesis testing with arbitrary number of
parameters)
●
Population builder for gravitational wave studies
●
Release the POPULATRON in GPL fashion