sdapy.models.arnett_tail.taum_to_Mej_Ek_1

sdapy.models.arnett_tail.taum_to_Mej_Ek_1(tau_m, v_ej, taum_err=None, vej_err=None, k_opt=None, sntype='Ic')

break the degenracy of kinetic energy and ejecta mass, with the help of velocity.

for Homologous Expansion: vm = vej = sqrt(Ekin/Mej*10./3.)

Parameters

tau_mfloat

Arnett model parameter, characteristic time, unit in days, decided by ejecta mass and kinetic enegies.

v_ejfloat

here vej is the photospheric velocity (unit: 10**3 km/s), which can be assumed as line velocities.

taum_errfloat

Error of taum.

vej_errfloat

Error of vej.

k_optfloat

diffusion opacity