Isochrone

class beast.physicsmodel.stars.isochrone.Isochrone(name='', *args, **kwargs)

Bases: object

Methods Summary

FeHtometal(feh)	Convert Z to [Fe/H] values
grid_metrics([check_keys])	Compute metrics of the grid Primarily to determine how well parameter space is covered Incomplete as it only computes along constant age, larger jumps between ages
metalToFeH(metal)	Convert Z to [Fe/H] values
plot(ax[, xval, yval, linestyle, color, alpha])	Plot the isochronses with the input x, y choices

Methods Documentation

FeHtometal(feh)

Convert Z to [Fe/H] values

grid_metrics(check_keys=['logL', 'logT', 'logg'])

Compute metrics of the grid Primarily to determine how well parameter space is covered Incomplete as it only computes along constant age, larger jumps between ages

Parameters:

check_keys (string array) – keys in grid to generage metrics for

Returns:

metrics – each entry has an array with [min, max, median, mean] deltas for that grid paramters

Return type:

dictonary

metalToFeH(metal)

Convert Z to [Fe/H] values

For example:

Zsun = 0.02 will give [Fe/H]sun = -4.33

For reference:

Z = [ 0.0004, 0.004, 0.008, 0.02, 0.05 ] [Fe/H] = [ -1.7 , -0.7 , -0.4 , 0 , 0.4 ]

plot(ax, xval='logT', yval='logL', linestyle='-', color='k', alpha=0.5)

Plot the isochronses with the input x, y choices

Parameters:

• ax (matplotlib axis) – where to plot

• xval (str, optional) – what data for x

• xval – what data for y

• linestyle (string) – matplotlib linestyle

• color (string) – matplotlib color

• alpha (float) – transparency for plotting