L02

class dust_attenuation.averages.L02(*args, meta=None, name=None, **kwargs)

Bases: BaseAttAvModel

Attenuation curve of Leitherer et al. (2002). Narrow validity range: 0.097 to 0.18 microns

Parameters:

Av: float

attenuation in V band

Raises:

InputParameterError

Input Av values outside of defined range

Notes

From Leitherer (2002, ApJS, Volume 140, Issue 2, pp. 303-329), eq. 14

Example:

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

from dust_attenuation.averages import L02

fig, ax = plt.subplots()

# generate the curves and plot them
x = np.arange(0.1,0.18,0.01)*u.micron

Avs = [0.1,0.5,1.0,2.0,5.0]
for cur_Av in Avs:
   att_model = L02(Av=cur_Av)
   ax.plot(1/x,att_model(x),label=r'A$_V$ = %.2f mag' % (cur_Av))

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

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

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

Attributes Summary

Rv
x_range

Methods Summary

evaluate(x, Av)	Returns the attenuation curve, A(λ), following the recipe of Leitherer et al. (2002), assuming Rv=4.05.
k_lambda(x)	Compute the starburst reddening curve of Leitherer et al. (2002)

Attributes Documentation

Rv = 4.05

x_range = [0.097, 0.18]

Methods Documentation

evaluate(x, Av)

Returns the attenuation curve, A(λ), following the recipe of Leitherer et al. (2002), assuming Rv=4.05

Parameters:

in_x: float

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

internally microns are used

Returns:

att: np array (float)

Att(x) attenuation curve [mag]

Raises:

ValueError

Input x values outside of defined range

k_lambda(x)

Compute the starburst reddening curve of Leitherer et al. (2002)

k’(λ)=A(λ)/E(B-V)

Parameters:

in_x: float

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

internally microns are used

Returns:

k_lambda: np array (float)

k_lambda(x) reddening curve

Raises:

ValueError

Input x values outside of defined range