sdapy.models.arnett_tail.taum_to_Mej_Ek

sdapy.models.arnett_tail.taum_to_Mej_Ek(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 Thin Shell: vej = sqrt(2*Ekin/Mej)

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 related to line velocities (He 5876 and O 7772 line velocity at peak epoch for SN Ib and Ic correspondingly) via Dessart et al 2014.

taum_errfloat

Error of taum.

vej_errfloat

Error of vej.

k_optfloat

diffusion opacity