sdapy.models.arnett_tail.t0_to_Mej_Ek

sdapy.models.arnett_tail.t0_to_Mej_Ek(c*kgamma*Mej**2/Ekin) vej = sqrt(2*Ekin/Mej)

from tail characteristic time, t0 to kinetic energy and ejecta mass seperately t0 = sqrt(c*kgamma*Mej**2/Ekin) vej = sqrt(2*Ekin/Mej)

Parameters

t_0float

Tail 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.

t0_errfloat

Error of t0.

vej_errfloat

Error of vej.

k_gammafloat

gamma ray opacity