{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Bolometric correction grids\n", "\n", "Bolometric correction is defined as the difference between the apparent bolometric magnitude of a star and its apparent magnitude in a particular bandpass:\n", "\n", "$$BC_x = m_{bol} - m_x$$\n", "\n", "The MIST project provide [grids of bolometric corrections](http://waps.cfa.harvard.edu/MIST/model_grids.html#bolometric) in many photometric systems as a function of stellar temperature, surface gravity, metallicity, and $A_V$ extinction. This allows for accurate conversion of bolometric magnitude of a star (available from the theoretical grids) to magnitude in any band, at any extinction (and distance), without the need for any \"effective wavelength\" approximation (used in **isochrones** prior to v2.0), which breaks down for broad bandpasses and large extinctions. These grids are downloaded, organized, stored, and interpolated in much the same manner as the model grids. " ] }, { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs": [], "source": [ "from isochrones.mist.bc import MISTBolometricCorrectionGrid\n", "\n", "bc_grid = MISTBolometricCorrectionGrid(['J', 'H', 'K', 'G', 'BP', 'RP', 'g', 'r', 'i'])" ] }, { "cell_type": "code", "execution_count": 2, "metadata": {}, "outputs": [ { "data": { "text/html": [ "
\n", " | \n", " | \n", " | \n", " | g | \n", "r | \n", "i | \n", "J | \n", "H | \n", "K | \n", "G | \n", "BP | \n", "RP | \n", "
---|---|---|---|---|---|---|---|---|---|---|---|---|
Teff | \n", "logg | \n", "[Fe/H] | \n", "Av | \n", "\n", " | \n", " | \n", " | \n", " | \n", " | \n", " | \n", " | \n", " | \n", " |
2500.0 | \n", "-4.0 | \n", "-4.0 | \n", "0.00 | \n", "-6.534742 | \n", "-3.332877 | \n", "-1.617626 | \n", "1.845781 | \n", "2.927064 | \n", "3.436304 | \n", "-2.181986 | \n", "-4.652544 | \n", "-0.881255 | \n", "
0.05 | \n", "-6.590469 | \n", "-3.375570 | \n", "-1.650338 | \n", "1.831466 | \n", "2.917990 | \n", "3.430463 | \n", "-2.211637 | \n", "-4.697700 | \n", "-0.909057 | \n", "|||
0.10 | \n", "-6.646182 | \n", "-3.418258 | \n", "-1.683043 | \n", "1.817153 | \n", "2.908916 | \n", "3.424623 | \n", "-2.241240 | \n", "-4.742838 | \n", "-0.936829 | \n", "|||
0.15 | \n", "-6.701881 | \n", "-3.460939 | \n", "-1.715740 | \n", "1.802841 | \n", "2.899842 | \n", "3.418782 | \n", "-2.270797 | \n", "-4.787959 | \n", "-0.964571 | \n", "|||
0.20 | \n", "-6.757566 | \n", "-3.503615 | \n", "-1.748429 | \n", "1.788530 | \n", "2.890769 | \n", "3.412942 | \n", "-2.300306 | \n", "-4.833062 | \n", "-0.992285 | \n", "