Temperature and density dependent cooling function for H$_2$ with updated H$_2$/H collisional rates
Abstract
The energy transfer among the components in a gas determines its fate. Especially at low temperatures, inelastic collisions drive the cooling and the heating mechanisms. In the early Universe as well as in zero- or low- metallicity environments the major contribution comes from the collisions among atomic and molecular hydrogen, also in its deuterated version. The present work shows some updated calculations of the H cooling function based on novel collisional data which explicitely take into account the reactive pathway at low temperatures. Deviations from previous calculations are discussed and a multivariate data analysis is performed to provide a fit depending on both the gas temperature and the density of the gas.
Cite
@article{arxiv.1907.01566,
title = {Temperature and density dependent cooling function for H$_2$ with updated H$_2$/H collisional rates},
author = {Carla Maria Coppola and François Lique and Francesca Mazzia and Fabrizio Esposito and Mher V. Kazandjian},
journal= {arXiv preprint arXiv:1907.01566},
year = {2019}
}
Comments
5 pages, 2 figures, 1 table