English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present models of the evolution of the gaseous and stellar content ofgalaxies incorporating the formation of H_2 out of HI gas as part of such amodel. We do so by formulating a subgrid model for gas clouds that useswell-known cloud scaling relations and solves for the HI-H_2 balance set by theH_2 formation on dust grains and its FUV-induced photodissociation by thetemporally and spatially varying interstellar radiation field. This allows theseamless tracking of the evolution of the H_2 gas phase, its precursor ColdNeutral Medium (CNM) HI gas, simultaneously with the star formation. Our mostimportant findings are: a) a significant dependence of the HI-H_2 transitionand the resultant H_2 gas mass on the ambient metallicity and the H_2 formationrate, b) the important influence of the characteristic star formation timescale(regulating the ambient FUV radiation field) on the equilibrium H_2 gas massand c) the possibility of a diffuse H_2 gas phase. Finally, we implement andbriefly explore a novel approach of using the ambient H_2 gas mass fraction asa criterion for the onset of star formation. (abridged)Comment: 46 pages, 14 figures (AASTEX); accepted for Ap

Incorporating the Molecular Gas Phase in Galaxy‐sized Numerical Simulations: First Applications in Dwarf Galaxies