extinction.fm07

extinction.fm07(wave, a_v, unit='aa')

Fitzpatrick & Massa (2007) extinction model for R_V = 3.1.

The Fitzpatrick & Massa (2007) [1] model, which has a slightly different functional form from that of Fitzpatrick (1999) [3] (extinction_f99). Fitzpatrick & Massa (2007) claim it is preferable, although it is unclear if signficantly so (Gordon et al. 2009 [2]). Defined from 910 A to 6 microns.

Parameters:
wave : numpy.ndarray (1-d)

Wavelengths or wavenumbers.

a_v : float

Scaling parameter, A_V: extinction in magnitudes at characteristic V band wavelength.

unit : {‘aa’, ‘invum’}, optional

Unit of wave: ‘aa’ (Angstroms) or ‘invum’ (inverse microns).

References

[1]Fitzpatrick, E. L. & Massa, D. 2007, ApJ, 663, 320
[2]Gordon, K. D., Cartledge, S., & Clayton, G. C. 2009, ApJ, 705, 1320
[3]Fitzpatrick, E. L. 1999, PASP, 111, 63