eprintid: 10187692
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/18/76/92
datestamp: 2024-02-26 11:44:54
lastmod: 2024-02-26 11:44:54
status_changed: 2024-02-26 11:44:54
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Hogarth, LM
creators_name: Saintonge, A
creators_name: Davis, TA
creators_name: Ellison, SL
creators_name: Lin, L
creators_name: López-Cobá, C
creators_name: Pan, H-A
creators_name: Thorp, MD
title: The ALMaQUEST Survey XIV: do radial molecular gas flows affect the star-forming ability of barred galaxies?
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
keywords: Molecular data –galaxies: kinematics and dynamics –galaxies: structure
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abstract: We investigate whether barred galaxies are statistically more likely to harbour radial molecular gas flows and what effect those flows have on their global properties. Using 46 galaxies from the ALMA-MaNGA QUEnching and STar formation (ALMaQUEST) survey, we identify galaxies hosting optical bars using a combination of the morphological classifications in Galaxy Zoo 2 and HyperLEDA. In order to detect radial molecular gas flows, we employ full 3D kinematic modelling of the ALMaQUEST 12CO(1-0) datacubes. By combining our bar classifications with our radial bar-driven flow detections, we find that galaxies classed as barred are statistically more likely to host large-scale radial gas motions compared to their un-barred and edge-on galaxy counterparts. Moreover, the majority of barred galaxies require multi-component surface brightness profiles in their best-fit models, indicative of the presence of resonance systems. We find that galaxies classed as barred with radial bar-driven flows (“barred + radial flow” subset) have significantly suppressed global star-formation efficiencies compared to barred galaxies without radial bar-driven flows and galaxies in the other morphological sub-samples. Our “barred + radial flow” subset galaxies also possess consistently centrally concentrated molecular gas distributions, with no indication of depleted gas mass fractions, suggesting that gas exhaustion is not the cause of their suppressed star formation. Furthermore, these objects have higher median gas mass surface densities in their central 1 kpc, implying that a central gas enhancements do not fuel central starbursts in these objects. We propose that dynamical effects, such as shear caused by large-scale inflows of gas, act to gravitationally stabilise the inner gas reservoirs.
date: 2024-02-06
date_type: published
publisher: Oxford University Press (OUP)
official_url: http://dx.doi.org/10.1093/mnras/stae377
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2249706
doi: 10.1093/mnras/stae377
lyricists_name: Saintonge, Amelie
lyricists_id: ASAIN59
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: Monthly Notices of the Royal Astronomical Society
volume: 528
number: 4
pagerange: 6768-6785
citation:        Hogarth, LM;    Saintonge, A;    Davis, TA;    Ellison, SL;    Lin, L;    López-Cobá, C;    Pan, H-A;           Hogarth, LM;  Saintonge, A;  Davis, TA;  Ellison, SL;  Lin, L;  López-Cobá, C;  Pan, H-A;  Thorp, MD;   - view fewer <#>    (2024)    The ALMaQUEST Survey XIV: do radial molecular gas flows affect the star-forming ability of barred galaxies?                   Monthly Notices of the Royal Astronomical Society , 528  (4)   pp. 6768-6785.    10.1093/mnras/stae377 <https://doi.org/10.1093/mnras%2Fstae377>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10187692/1/stae377.pdf