synthpop.modules.extinction.fitzpatrick2009

Extinction law from Fitzpatrick & Massa (2009), where an alternative to a lower law model allows for good fit among many lines of sight when the free parameters are varied appropriately.

Function dependent on R_V and alpha parameters, typically alpha~2.5 and R_V=3 (our defualt), or alpha~1.8, R_V~5.

Valid from 0.5-3 microns.

Source DOI: 10.1088/0004-637X/699/2/1209

Classes

Fitzpatrick2009

Extinction law from Fitzpatrick et al. (2009)

Module Contents

class synthpop.modules.extinction.fitzpatrick2009.Fitzpatrick2009(R_V: float = 3.1, alpha: float = 2.5, **kwargs)

Bases: synthpop.modules.extinction._extinction.ExtinctionLaw

Extinction law from Fitzpatrick et al. (2009)

Attributes

R_V=3.1float

optical total-to-selective extinction ratio

alpha=2.5float

exponent in extinction law function

extinction_law_name = 'Fitzpatrick2009'

law_ref_wavelength = 0.549

R_V = 3.1

alpha = 2.5

min_wavelength = 0.5

max_wavelength = 3.0

Alambda_Aref(eff_wavelength: float) → float

Given an effective wavelength lambda_eff, calculate the extinction ratio A_lambda/A_ref

Parameters

eff_wavelengthfloat

wavelength to compute extinction ratio at [microns]