Another X-ray UFO without a momentum-boosted molecular outflow. ALMA CO(1-0) observations of the galaxy pair IRAS 05054+1718
Journal
Date Issued
2023
Author(s)
Bonanomi, F.
•
CICONE, CLAUDIA
•
•
•
Vignali, C.
•
Reeves, J. N.
•
Sirressi, M.
•
Montoya Arroyave, I.
•
•
Ballo, L.
•
Dotti, M.
Abstract
We present ALMA CO(1-0) observations of the nearby LIRG galaxy pair
IRAS05054+1718 with a new analysis of X-ray data collected between 2012 and
2021 using NuSTAR, Swift, and XMM-Newton. The western component of the pair,
NED01, hosts a Seyfert 1.9 nucleus launching a powerful X-ray UFO. Our X-ray
spectral analysis suggests the UFO could be variable or multi-component in
velocity and constrains its momentum flux to $\dot p^{X-ray}_{out} \sim
(4\pm2)\times 10^{34}$ gcms$^{-2}$. ALMA CO(1-0) observations include also the
eastern component of the pair, a LIRG with no clear evidence for an AGN. We
study the CO(1-0) kinematics in the two galaxies using the 3D-BAROLO code. In
both sources, we can model the bulk of the CO(1-0) emission with rotating disks
and, after subtracting the best-fit models, we detect compact residual emission
at S/N=15 within $\sim3$kpc from the centre. A molecular outflow in NED01, if
present, cannot be brighter than such residuals, implying an upper limit on its
outflow rate of $\dot{M}^{mol}_{out} \lesssim 19\pm14~M_{\odot}~yr^{-1}$ and on
its momentum rate of $\dot p^{mol}_{out} \lesssim (2.7\pm2.4) \times
10^{34}$gcms$^{-1}$. Combined with the revised energetics of the X-ray wind, we
derive an upper limit on the momentum rate ratio of
$\dot{p}^{mol}_{out}/\dot{p}^{X-ray}_{out}<0.67$. We discuss these results in
the context of the expectations of AGN feedback models, and we propose the
X-ray disk wind in NED01 has not significantly impacted the molecular gas
reservoir (yet), and we can constrain its effect to be much smaller than
expectations of AGN ''energy-driven'' feedback models. We also consider and
discuss the hypothesis of asymmetries of the molecular disk not properly
captured by the 3D-BAROLO code. Our results highlight the challenges in testing
the predictions of popular AGN disk-wind feedback theories, even with good
quality multi-wavelength observations.
Volume
673
Start page
A46
Issn Identifier
0004-6361
Rights
open.access
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