redback.eos.PiecewisePolytrope

class redback.eos.PiecewisePolytrope(log_p, gamma_1, gamma_2, gamma_3)

Bases: object

__init__(log_p, gamma_1, gamma_2, gamma_3)

Parameters:

• log_p – log central pressure in SI units

• gamma_1 – polytrope index 1

• gamma_2 – polytrope index 2

• gamma_3 – polytrope index 3

__call__(**kwargs)

Call self as a function.

Methods

__init__(log_p, gamma_1, gamma_2, gamma_3)	param log_p: log central pressure in SI units
lambda_array_of_central_pressure(...[, ...])	param central_pressure_array: array of central pressure in SI units
lambda_of_central_pressure(central_pressure)	param central_pressure:
lambda_of_mass(central_pressure, mass[, ...])	param central_pressure: central pressure in SI units
maximum_mass()	return: maximum non-rotating mass in solar masses (Mtov) for the equation of state
maximum_speed_of_sound()	return: maximum speed of sound in units of c
radius_of_mass(mass)	param mass: mass array in solar masses

lambda_array_of_central_pressure(central_pressure_array, maximum_mass_lower_limit=2.01)

Parameters:

• central_pressure_array – array of central pressure in SI units

• maximum_mass_lower_limit – 2.01 solar masses, Throw out EOS’s that are below this value.

Users should enforce this at the prior level. :return: dimensionless tidal deformability

lambda_of_central_pressure(central_pressure)

Parameters:

central_pressure –

Returns:

mass in solar masses and dimensionless tidal deformability

lambda_of_mass(central_pressure, mass, maximum_mass_lower_limit=2.01)

Parameters:

• central_pressure – central pressure in SI units

• mass – neutron star masses in solar masses

• maximum_mass_limit –

Returns:

lambda for the given mass array

maximum_mass()

Returns:

maximum non-rotating mass in solar masses (Mtov) for the equation of state

maximum_speed_of_sound()

Returns:

maximum speed of sound in units of c

radius_of_mass(mass)

Parameters:

mass – mass array in solar masses

Returns:

return radius in meters