Temperature and density dependent cooling function for H$_2$ with updated H$_2$/H collisional rates
| Autor: | Carla Maria Coppola, François Lique, Fabrizio Esposito, Francesca Mazzia, M. V. Kazandjian |
|---|---|
| Přispěvatelé: | Laboratoire Ondes et Milieux Complexes (LOMC), Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
[PHYS]Physics [physics]
Physics Work (thermodynamics) molecular data molecular processes stars early-type-cosmology early Universe Energy transfer media_common.quotation_subject Metallicity Inelastic collision FOS: Physical sciences Astronomy and Astrophysics Function (mathematics) 01 natural sciences 7. Clean energy Astrophysics - Astrophysics of Galaxies Universe Deuterium Space and Planetary Science Density dependent Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Atomic physics 010306 general physics 010303 astronomy & astrophysics ComputingMilieux_MISCELLANEOUS media_common |
| Zdroj: | Monthly notices of the Royal Astronomical Society (Online) 486 (2019): 1590–1593. doi:10.1093/mnras/stz927 info:cnr-pdr/source/autori:Coppola Carla Maria; Lique François; Mazzia Francesca; Esposito Fabrizio; Kazandjian Mher V./titolo:Temperature and density dependent cooling function for H2 with updated H2%2FH collisional rates/doi:10.1093%2Fmnras%2Fstz927/rivista:Monthly notices of the Royal Astronomical Society (Online)/anno:2019/pagina_da:1590/pagina_a:1593/intervallo_pagine:1590–1593/volume:486 Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2019, 486 (2), pp.1590-1593. ⟨10.1093/mnras/stz927⟩ Monthly Notices of the RAS (0035-8711), 486(2), 1590-1593 |
| ISSN: | 0035-8711 1365-2966 |
| DOI: | 10.1093/mnras/stz927 |
| Popis: | 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$_2$ 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. 5 pages, 2 figures, 1 table |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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