Package enrichpy :: Module yields

Module yields

Encapsulates stellar chemical yield data, currently only carbon 12.

General scheme:

For each data source, a Yield_Data subclass handles reading in the data and converting it into numpy array of yields, stellar masses, and stellar metallicites.

The Interpolate_Yields class take a Yield_Data subclass instance and handles the creation of an interpolation function that returns the yield as a function of stellar mass and metallicity.

Classes
	Yield_Data Base class for yield data.
	Data_vdHG van den Hoek and Groenewegen (1997): 0.8 -- 8 Msun; Z = 0.001 -- 0.04
	Data_H Herwig 2004: 2-6 Msun; Z=0.0001
	Data_GBM Gavilan, Buell, & Molla (2005): 0.8 -- 100 Msun; log(Z/Zsun)=-0.2--+0.2
	Exponentiate Decorator to exponentiate some arguments before calling the function.
	Interpolate_Yields The ejected carbon mass is interpolated on a logarithmic metalicity scale and mass scale.
	Data_ChLi Chieffi & Limongi (2004) yields: 13--35 Msun; Z = 0, 1e-6 -- 0.02
	Data_CaLa Campbell & Lattanzio 2008 0.85 -- 3 Msun; Z = 0, & [Fe/H] = -6.5 -- -3.0

Functions

ejection_from_yield(mYield, mIni, mRem, xIni)
Convert net yield of an element to total ejected mass.

source code

yield_from_ejection(mEj, mIni, mRem, xIni)
Convert total ejected mass to net yield of an element.

source code

linear_coefficients(x, y)

source code

print_linear_info(slope, intercept)

source code

extrapolate_function(yield_function, metallicity, return_coeffs=False)
Linearly extrapolate yield data to high and low masses.

source code

test_plot_data_interp(data, nm=1000.0, nZ=1000.0, **args)

source code

data_overlap(data_list)

source code

test_plot_interp(data_list, Z_list, nm=1000.0, maxmass=None, ejections=False, title=None, logx=True, logy=True)

source code

test_all()

source code

Variables
	__package__ = `'enrichpy'`

Function Details

ejection_from_yield(mYield, mIni, mRem, xIni)

source code

Convert net yield of an element to total ejected mass.

mYield, mIni, and mRem should be in the same units (which will also be the units of the returned ejected mass.

xIni is the initial mass fraction of the element.

See GBM equation 11.

Gavilan M., Buell J.F., Molla M. Astron. Astrophys. 2005, 432, 861 (2005A&A...432..861G)

yield_from_ejection(mEj, mIni, mRem, xIni)

source code

Convert total ejected mass to net yield of an element.

mEj, mIni, and mRem should be in the same units (which will also be the units of the returned yield.

xIni is the initial mass fraction of the element.

See GBM equation 11.

Gavilan M., Buell J.F., Molla M. Astron. Astrophys. 2005, 432, 861 (2005A&A...432..861G)

extrapolate_function(yield_function, metallicity, return_coeffs=False)

source code

Linearly extrapolate yield data to high and low masses.

Returns two functions: the high mass extrapolation and the low mass extrapolation.