I05_MWAvg¶

class dust_extinction.averages.I05_MWAvg(*args, meta=None, name=None, **kwargs)[source]¶

Bases: BaseExtModel

Indebetouw et al (2005) MW Average Extinction Curve

Parameters:

None

Raises:

None

Notes

From Indebetouw et al. (2005, ApJ, 619, 931)

Example showing the average curve

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

from dust_extinction.averages import I05_MWAvg

fig, ax = plt.subplots()

# define the extinction model
ext_model = I05_MWAvg()

# generate the curves and plot them
x = np.arange(1.0/ext_model.x_range[1], 1.0/ext_model.x_range[0], 0.1) * u.micron

ax.plot(x,ext_model(x),label='I05_MWAvg')
ax.plot(1.0/ext_model.obsdata_x, ext_model.obsdata_axav, 'ko',
        label='obsdata')

ax.set_xlabel(r'$\lambda$ [$\mu m$]')
ax.set_ylabel(r'$A(x)/A(V)$')

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

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

../_images/dust_extinction-averages-I05_MWAvg-1.png

Attributes Summary

`Rv`
`obsdata_axav`
`obsdata_axav_unc`
`obsdata_tolerance`
`obsdata_x`
`x_range`

Methods Summary

evaluate(in_x)

I05 MWAvg function

Attributes Documentation

Rv = 3.1¶

obsdata_axav = array([0.28 , 0.1736 , 0.112 , 0.06272, 0.04816, 0.04816, 0.04816])¶

obsdata_axav_unc = array([0.0168 , 0.00896, 0. , 0.00672, 0.00896, 0.0112 , 0.0112 ])¶

obsdata_tolerance = 1e-06¶

obsdata_x = array([0.80645161, 0.60096154, 0.46210721, 0.28208745, 0.22512382, 0.17621145, 0.12886598])¶

x_range = [0.1288659793814433, 0.8064516129032259]¶

Methods Documentation

evaluate(in_x)[source]¶

I05 MWAvg 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

Navigation

I05_MWAvg¶