pint.derived_quantities.pulsar_edot

pint.derived_quantities.pulsar_edot(f: ~astropy.units.quantity.Quantity, fdot: ~astropy.units.quantity.Quantity, I: ~astropy.units.quantity.Quantity = <Quantity 1.e+45 cm2 g>) → Quantity

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