Extinction Curves¶
Few extinction curves have been included in speXtra
To list the names of the extinction curves included in the database
from spextra import Database
db = Database()
db.extinction_curves
{'gordon': 'LMC and SMC extinction laws',
'cardelli': 'MW extinction laws',
'calzetti': 'extragalactic attenuation curves'}
Gordon¶
# Gordon LMC/SMC Extinctions Curves
name: gordon
title : EC for the Large and Small Magellanic Clouds
summary: |
Extinction curves for Large and Small Magellanic Clouds
source : Gordon et al. 2003, ApJ, 594, 279
wave_unit : 1/um
extinction_unit : Av/E(B-V)
wave_column : WAVELENGTH
extinction_column : Av/E(B-V)
data_type : fits
file_extension : .fits
curves: # comment
lmc_30dor: LMC Supershell 30Dor R_V = 2.76
lmc_diffuse: LMC Average R_V = 3.41
smc_bar: SMC Average R_V = 2.74
Cardelli¶
# Cardelli MW Extinctions Curves
name: cardelli
title : EC for the Milky Way
summary: |
Extinction curves for the Milky Way
source : Cardelli, Clayton, & Mathis 1989, ApJ, 345, 245
wave_unit : 1/um
extinction_unit : Av/E(B-V)
wave_column : WAVELENGTH
extinction_column : Av/E(B-V)
data_type : fits
file_extension : .fits
curves: # comment
milkyway_dense : R_V = 5.0
milkyway_diffuse : R_V = 3.1
milkyway_rv21 : R_V = 2.1
milkyway_rv4 : R_V = 4.0
Calzetti¶
# Calzetti Extragalactic Extinction Curve
name: calzetti
title : EC for Starburst Appropriate for stellar continnum
summary: |
Contains Extintion curve for Starbust Extintion/Attenuation law.
This is an attenuation law; i.e. it has radiative transfer effects of
mixing the stars & dust together which modifies the shape of the
curve. These effects are not present in the other extinction laws
as they are derived for single stars behind a screen of dust.
source : Calzetti et al. 2000. ApJ, 533, 682
wave_unit : Angstrom
extinction_unit : Av/E(B-V)
wave_column : WAVELENGTH
extinction_column : Av/E(B-V)
data_type : fits
file_extension : .fits
curves: # comment
starburst: extragalactic starburst