pint.derived_quantities.pulsar_edot

pint.derived_quantities.pulsar_edot(f: Unit("Hz"), fdot: Unit("Hz / s"), I=<Quantity 1.e+45 cm2 g>)

Compute pulsar spindown energy loss rate

Return the pulsar Edot (\(\dot E\), in erg/s) given the spin frequency f and frequency derivative fdot. The NS moment of inertia is assumed to be I = 1.0e45 g cm^2 by default.

Parameters:

• f (astropy.units.Quantity) – pulsar frequency

• fdot (astropy.units.Quantity) – frequency derivative \(\dot f\)

• I (astropy.units.Quantity, optional) – pulsar moment of inertia, default of 1e45 g*cm**2

Returns:

Edot – pulsar spin-down luminosity in u.erg/u.s

Return type:

astropy.units.Quantity

Raises:

• astropy.units.UnitsError – If the input data are not appropriate quantities

• TypeError – If the input data are not quantities

Notes

Calculates \(\dot E = -4\pi^2 I f \dot f\)