G03_LMC2

class dust_extinction.averages.G03_LMC2(*args, meta=None, name=None, **kwargs)[source]

Bases: dust_extinction.baseclasses.BaseExtModel

Gordon et al (2003) LMC2 Average Extinction Curve

Parameters
None
Raises
None

Notes

From Gordon et al. (2003, ApJ, 594, 279)

Example showing the average curve

import numpy as np
import matplotlib.pyplot as plt
import astropy.units as u

from dust_extinction.averages import G03_LMC2

fig, ax = plt.subplots()

# generate the curves and plot them
x = np.arange(0.3,10.0,0.1)/u.micron

# define the extinction model
ext_model = G03_LMC2()

# generate the curves and plot them
x = np.arange(ext_model.x_range[0], ext_model.x_range[1],0.1)/u.micron

ax.plot(x,ext_model(x),label='G03 LMC2')
ax.plot(ext_model.obsdata_x, ext_model.obsdata_axav, 'ko',
        label='obsdata')

ax.set_xlabel(r'$x$ [$\mu m^{-1}$]')
ax.set_ylabel(r'$A(x)/A(V)$')

ax.legend(loc='best')
plt.show()

(Source code, png, hires.png, pdf)

../_images/dust_extinction-averages-G03_LMC2-1.png

Attributes Summary

Rv

obsdata_axav

obsdata_tolerance

obsdata_x

x_range

Methods Summary

evaluate(in_x)

G03 LMC2 function

Attributes Documentation

Rv = 2.76
obsdata_axav = array([0.101, 0.15 , 0.299, 1.   , 1.349, 1.665, 1.899, 2.067, 2.249,        2.447, 2.777, 2.922, 2.921, 2.812, 2.805, 2.863, 2.932, 3.06 ,        3.11 , 3.299, 3.408, 3.515, 3.67 , 3.862, 3.937, 4.055])
obsdata_tolerance = 0.06
obsdata_x = array([0.455, 0.606, 0.8  , 1.818, 2.273, 2.703, 3.375, 3.625, 3.875,        4.125, 4.375, 4.625, 4.875, 5.125, 5.375, 5.625, 5.875, 6.125,        6.375, 6.625, 6.875, 7.125, 7.375, 7.625, 7.875, 8.125])
x_range = [0.3, 10.0]

Methods Documentation

evaluate(in_x)[source]

G03 LMC2 function

Parameters
in_x: float

expects either x in units of wavelengths or frequency or assumes wavelengths in wavenumbers [1/micron]

internally wavenumbers are used

Returns
axav: np array (float)

A(x)/A(V) extinction curve [mag]

Raises
ValueError

Input x values outside of defined range