Barak 0.3.2 documentation

barak.extinction.starburst_Calzetti00

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barak.extinction.starburst_Calzetti00

barak.extinction.starburst_Calzetti00(wa, Rv=4.05)[source]

Dust extinction in starburst galaxies using the Calzetti relation.

Find the extinction as a function of wavelength for the given E(B-V) using the relation from Calzetti et al. R_v’ = 4.05 is assumed (see equation [5] of Calzetti et al. 2000 ApJ, 533, 682) E(B-V) is the extinction in the stellar continuum.

The wavelength array wa must be in Angstroms and sorted from low to high values.

Parameters :

wa : array_like

Array of wavelengths in Angstroms at which to calculate the extinction.

Rv : float (default 4.05)

Constant determining the slope of the extinction law.

Returns :

AlamAv : ndarray of floats, shape (N,)

A(lambda)/A(V) at each input wavelength.

References

Calzetti et al. 2000 ApJ, 533, 682:

Examples

wa = np.arange(1500, 3300, 0.1) tau = starburst_Calzetti00(wa, 0.08)

# Assume a power law for the input flux flux = (wa/1500) ** -1.5 extincted_flux = flux * np.exp(-tau)

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