Sub-mm emission line deep fields: CO and [C II] luminosity functions out to z = 6
Date Issued
2016
Author(s)
Popping, Gergö
•
van Kampen, Eelco
•
•
Spaans, Marco
•
Somerville, Rachel S.
•
Trager, Scott C.
Abstract
Now that Atacama Large (Sub)Millimeter Array is reaching its full capabilities, observations of sub-mm emission line deep fields become feasible. We couple a semi-analytic model of galaxy formation with a radiative transfer code to make predictions for the luminosity function of CO J =1-0 out to CO J = 6-5 and [C II] at redshifts z= 0-6. We find that (1) our model correctly reproduces the CO and [C II] emission of low- and high-redshift galaxies and reproduces the available constraints on the CO luminosity function at z ≤ 2.75; (2) we find that the CO and [C II] luminosity functions of galaxies increase from z = 6 to z = 4, remain relatively constant till z = 1 and rapidly decrease towards z = 0. The galaxies that are brightest in CO and [C II] are found at z ∼ 2; (3) the CO J = 3-2 emission line is most favourable to study the CO luminosity and global H2 mass content of galaxies, because of its brightness and observability with currently available sub-mm and radio instruments; (4) the luminosity functions of high-J CO lines show stronger evolution than the luminosity functions of low-J CO lines; (5) our model barely reproduces the available constraints on the CO and [C II] luminosity function of galaxies at z ≥ 1.5 and the CO luminosity of individual galaxies at intermediate redshifts. We argue that this is driven by a lack of cold gas in galaxies at intermediate redshifts as predicted by cosmological simulations of galaxy formation.
Volume
461
Issue
1
Start page
93
Issn Identifier
0035-8711
Ads BibCode
2016MNRAS.461...93P
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
stw1323.pdf
Description
Pdf editoriale
Size
1.86 MB
Format
Adobe PDF
Checksum (MD5)
e533611aa0700acfa0d80cca0a8077f7