def Mdwarf(name=None,dm=None):
"""Definition of a single, main sequence M-dwarf star of mass 0.25 Msol"""
star = combined_light_predictor.Star()
star.name = name
star.Mg = 13.650
star.Mr = 12.081
star.Mi = 10.714
star.Mz = 9.927
star.MJ = 8.398
star.MH = 7.910
star.MKs = 7.676
star.distance_modulus = dm
star.calculate_colours()
return star
def LTdwarf(name=None,dm=None):
"""Definition of a single L/T brown dwarf star of type T0 Msol"""
star = combined_light_predictor.Star()
star.name = name
star.Mg = 99.999
star.Mr = 99.999
star.Mi = 22.94
star.Mz = 19.11
star.MJ = 15.89
star.MH = 15.09
star.MKs = 14.46
star.distance_modulus = dm
star.calculate_colours()
return star
def Gdwarf(name=None,dm=None):
"""Definition of a single, main sequence G-dwarf star of mass 1.0 Msol"""
star = combined_light_predictor.Star()
star.name = name
star.Mg = 5.011
star.Mr = 4.574
star.Mi = 4.475
star.Mz = 4.465
star.MJ = 3.908
star.MH = 3.586
star.MKs = 3.555
star.distance_modulus = dm
star.calculate_colours()
return star
def Kdwarf(name=None,dm=None):
"""Definition of a single, main sequence K-dwarf star of mass 0.6 Msol"""
star = combined_light_predictor.Star()
star.name = name
star.Mg = 9.479
star.Mr = 8.189
star.Mi = 7.539
star.Mz = 7.150
star.MJ = 5.936
star.MH = 5.333
star.MKs = 5.196
star.distance_modulus = dm
star.calculate_colours()
return star
def setup_test_star():
star = combined_light_predictor.Star()
star.MB = 11.0
star.MV = 10.0
star.Mg = 10.0
star.Mr = 9.5
star.Mi = 9.2
star.Mz = 9.1
star.MJ = 8.2
star.MH = 8.3
star.MKs = 8.4
star.W149 = 8.0
star.Z087 = 9.1
star.distance_modulus = 11.0
return star
def M3dwarf(name=None, dm=None):
"""Definition of a single, main sequence M-dwarf star of mass 0.35 Msol"""
star = combined_light_predictor.Star()
star.name = name
star.Mg = 11.933
star.Mr = 10.409
star.Mi = 9.475
star.MB = 13.175
star.MV = 11.574
star.MJ = 7.566
star.MH = 7.014
star.MKs = 6.779
star.distance_modulus = dm
star.calculate_colours()
return star
def Kdwarf(name=None, dm=None):
"""Definition of a single, main sequence K-dwarf star of mass 0.88 Msol"""
star = combined_light_predictor.Star()
star.name = name
star.Mg = 5.749
star.Mr = 5.199
star.Mi = 5.058
star.MB = 6.368
star.MV = 5.584
star.MJ = 4.329
star.MH = 3.942
star.MKs = 3.897
star.distance_modulus = dm
star.calculate_colours()
return star
def M7dwarf(name=None, dm=None):
"""Definition of a single, main sequence M-dwarf star of mass 0.09 Msol"""
star = combined_light_predictor.Star()
star.name = name
star.Mg = 19.149
star.Mr = 17.181
star.Mi = 14.700
star.MB = 21.124
star.MV = 18.674
star.MJ = 11.033
star.MH = 10.458
star.MKs = 10.178
star.distance_modulus = dm
star.calculate_colours()
return star
def WhiteDwarf(teff, dm=None):
"""Definition of a single White Dwarf star, with parameters determined
by the t_eff provided
teff one of { 4000.0, 20000.0, 100000.0 }
Photometry from Bergeron 1995 PASP 107 1047.
"""
star = combined_light_predictor.Star()
star.distance_modulus = dm
if teff == 4000.0:
star.name = 'WD (4000K)'
star.MV = 16.105
star.MB = 17.081
star.BV = 0.976
star.VI = 1.249
star.RI = 0.620
star.VKs = 1.309
star.JH = -0.152
star.HKs = -0.126
elif teff == 20000.0:
star.name = 'WD (20000K)'
star.MV = 10.732
star.MB = 10.688
star.BV = -0.044
star.VI = -0.216
star.RI = -0.119
star.VKs = -0.705
star.JH = -0.063
star.HKs = -0.106
elif teff == 100000.0:
star.name = 'WD (100000K)'
star.MV = 8.408
star.MB = 8.079
star.BV = -0.329
star.VI = -0.358
star.RI = -0.210
star.VKs = -1.093
star.JH = -0.131
star.HKs = -0.134
else:
print('ERROR: No photometry available for a white dwarf of teff=' +
str(teff) + 'K')
return star
star.MI = star.MV - star.VI
star.MKs = star.MV - star.VKs
star.MH = star.MKs + star.HKs
star.MJ = star.MH + star.JH
star.JKs = star.MJ - star.MKs
phot = jester_phot_transforms.transform_JohnsonCousins_to_SDSS(BV=star.BV,
sigBV=0.0,
RI=star.RI,
sigRI=0.0,
V=star.MV,
sigV=0.0)
star.gr = phot['g-r']
star.ri = phot['r-i']
star.Mg = phot['g']
star.Mr = phot['r']
star.Mi = star.Mr - star.ri
return star
