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| Paper: |
Modelling the Sub-mm Emission of Galaxies Over Cosmic Time |
| Volume: |
499, Revolution in Astronomy with ALMA: The Third Year |
| Page: |
39 |
| Authors: |
Popping, G.; Pérez-Beaupuits, J. P. |
| Abstract: |
At redshift z∼ 1–3 the star-formation rate density (SFRD) of the Universe reached its peak, after which it dropped towards its current day value. ALMA allows us to observe atoms and molecules like C, C+, [OI], CO, and HCN for large groups of star- forming (SF) galaxies during this cosmic epoch. Emission lines from these species are good tracers of the properties of the interstellar medium (ISM) out of which new stars form. This proceeding describes our efforts to model the sub-mm line emission of these elements in SF galaxies, using the combination of a semi-analytic model of galaxy formation and a radiative transfer code. The presented model successfully reproduces CO scaling relations for local and high-redshift galaxies. Here we use this model to make predictions for the CO Spectral Line Energy Distribution (CO SLED) of galaxies at redshift z=0.0, z=1.2, and z=2.0. We discuss what physical processes drive the change in CO SLED shape with redshift and discuss future strategies to observe this. |
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