"""
Returns broadband albedo parameters based on the stellar type.
Parameters:
star (str): The star type, which must be one of 'F', 'G', 'K', or 'M'.
Returns:
dict: A dictionary with the following keys:
'Asnow', 'A_75', 'A_50', 'A_25', 'A_bi',
'A_o', 'A_l', 'c_2k', 'c_1', 'c_2', 'c_5',
'c_20', 'c_100', 'c_200', 'm'
"""
[docs]
def get_broadband_albedo(star):
if star == 'F':
Asnow = 0.66833
A_75 = 0.59884
A_50 = 0.53664
A_25 = 0.47961
A_bi = 0.42542
A_o = 0.32865
A_l = 0.41428
c_2k = 0.905
c_1 = 0.994
c_2 = 0.993
c_5 = 0.990
c_20 = 0.983
c_100 = 0.969
c_200 = 0.960
m = 0.83
elif star == 'G':
Asnow = 0.64622
A_75 = 0.57636
A_50 = 0.51363
A_25 = 0.45585
A_bi = 0.40093
A_o = 0.31948
A_l = 0.41484
c_2k = 0.901
c_1 = 0.992
c_2 = 0.991
c_5 = 0.988
c_20 = 0.979
c_100 = 0.963
c_200 = 0.954
m = 0.80
elif star == 'K':
Asnow = 0.60392
A_75 = 0.53716
A_50 = 0.47708
A_25 = 0.42150
A_bi = 0.36870
A_o = 0.30235
A_l = 0.40133
c_2k = 0.886
c_1 = 0.990
c_2 = 0.988
c_5 = 0.984
c_20 = 0.974
c_100 = 0.955
c_200 = 0.944
m = 0.78
elif star == 'M':
Asnow = 0.39800
A_75 = 0.35478
A_50 = 0.31546
A_25 = 0.28406
A_bi = 0.24317
A_o = 0.23372
A_l = 0.33165
c_2k = 0.790
c_1 = 0.973
c_2 = 0.970
c_5 = 0.959
c_20 = 0.936
c_100 = 0.900
c_200 = 0.881
m = 0.63
else:
raise ValueError("Invalid star type. Must be one of 'F', 'G', 'K', or 'M'.")
return {
'Asnow': Asnow,
'A_75': A_75,
'A_50': A_50,
'A_25': A_25,
'A_bi': A_bi,
'A_o': A_o,
'A_l': A_l,
'c_2k': c_2k,
'c_1': c_1,
'c_2': c_2,
'c_5': c_5,
'c_20': c_20,
'c_100': c_100,
'c_200': c_200,
'm': m
}