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SimplePulsar

class gammapy.astro.source.SimplePulsar(P, P_dot, I=<Quantity 1.e+45 cm2 g>, R=<Quantity 1000000. cm>)

Bases: object

Magnetic dipole spin-down model for a pulsar.

Reference: http://www.cv.nrao.edu/course/astr534/Pulsars.html

Parameters:

P : Quantity

Rotation period (sec)

P_dot : Quantity

Rotation period derivative (sec sec^-1)

I : Quantity

Moment of inertia (g cm^2)

R : Quantity

Radius of the pulsar (cm)

Attributes Summary

luminosity_spindown	Spin-down luminosity (Quantity).
magnetic_field	Magnetic field strength at the polar cap (Quantity).
tau	Characteristic age (Quantity).

Attributes Documentation

luminosity_spindown

Spin-down luminosity (Quantity).

Notes

The spin-down luminosity is given by:

$$\dot{L} = 4\pi^2 I \frac{\dot{P}}{P^{3}}$$

magnetic_field

Magnetic field strength at the polar cap (Quantity).

Notes

The magnetic field is given by:

$$B = 3.2\cdot 10^{19} (P\dot{P})^{1/2} [\textnormal(Gauss)]$$

tau

Characteristic age (Quantity).

Notes

The characteristic age is given by:

$$\tau = \frac{P}{2\dot{P}}$$