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The dust content of galaxies from z = 0 to z = 9

Authors :
Rachel S. Somerville
Maud Galametz
Gergö Popping
Publication Year :
2016

Abstract

We study the dust content of galaxies from $z=0$ to $z=9$ in semi-analytic models of galaxy formation that include new recipes to track the production and destruction of dust. We include condensation of dust in stellar ejecta, the growth of dust in the interstellar medium (ISM), the destruction of dust by supernovae and in the hot halo, and dusty winds and inflows. The rate of dust growth in the ISM depends on the metallicity and density of molecular clouds. Our fiducial model reproduces the relation between dust mass and stellar mass from $z=0$ to $z=7$, the number density of galaxies with dust masses less than $10^{8.3}\,\rm{M}_\odot$, and the cosmic density of dust at $z=0$. The model accounts for the double power-law trend between dust-to-gas (DTG) ratio and gas-phase metallicity of local galaxies and the relation between DTG ratio and stellar mass. The dominant mode of dust formation is dust growth in the ISM, except for galaxies with $M_*<br />Accepted for publication in MNRAS

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....f6dca4dd8a118f7b5c76e4ce49cca8fb