Being KLEVER at cosmic noon: ionised gas outflows are inconspicuous in low-mass star-forming galaxies but prominent in massive AGN hosts
Date Issued
2022
Author(s)
Concas, Alice
•
Maiolino, Roberto
•
Curti, Mirko
•
Hayden-Pawson, Connor
•
Cirasuolo, Michele
•
Jones, Gareth C.
•
•
•
•
Cullen, Fergus
•
•
•
Cappellari, Michele
•
CICONE, CLAUDIA
•
Peng, Yingjie
•
Troncoso, Paulina
Abstract
We investigate the presence of ionised gas outflows in a sample of 141
main-sequence star-forming galaxies at $1.2 10.8$, AGN-dominated galaxies, suggesting that AGNs
may be the primary drivers of these gas flows. Surprisingly, at
$\log(M_\star/M_{\odot})\leq 9.6$, the observed line profiles are fully
consistent with a rotating disc model, indicating that ionised gas outflows in
dwarf galaxies might play a negligible role even during the peak of cosmic
star-formation activity. Finally, we find that the observed mass loading factor
scales with stellar mass as expected from the TNG50 cosmological simulation,
but the ionised gas mass accounts for only 2$\%$ of the predicted value. This
suggests that either the bulk of the outflowing mass is in other gaseous phases
or the current feedback models implemented in cosmological simulations need to
be revised.
Volume
513
Issue
2
Start page
2535
Issn Identifier
0035-8711
Rights
open.access
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