{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Emission Spectra Model Visuals\n", "\n", "Contribution visuals are an important tool for interpreting forward models and retrieved spectra. \n", "\n", "We differentiate here between two types of contribution visuals: (i) *spectral decomposition plots*, which highlight the impact of each chemical species on a spectrum; and (ii) *pressure contribution plots*, which highlight the atmospheric layers driving the formation of spectral features.\n", "\n", "In this notebook, we will take HD 189733 b as an example forward model and analyse:\n", "\n", "1. The spectral components of an emission spectrum in terms of brightness temperature.\n", "2. Where in the forward model atmosphere the spectrum forms.\n", "3. Which pressure regions are probed at different wavelengths.\n", "\n", "For the entirety of this notebook, we will assume some familiarity with the transmission spectra version of this notebook ([\\\"Transmission Spectra Model Visuals\\\"](transmission_contributions.html)).\n", "\n", "However, we stress that pressure contribution visuals tend to be more pertinent for emission spectra than transmission. This is because in emission, gas species can only impart spectral features where there is a thermal gradient (thermal inversions cause emission features, thermal decline cause absorption features) and therefore can probe specific regions of the atmosphere.\n", "\n", "\n", "