2026-04-04T17:15:14Zivo://CDS.VizieR/J/A+A/707/A1522026-03-03T19:24:01ZJ.A_AIVOABar morphologies of HSC-SSP disc galaxiesWe investigate the role of galactic bars in fuelling and triggering Active Galactic Nucleus (AGN) in disc galaxies up to z~0.8. We utilise a Deep Learning model, fine-tuned on Galaxy Zoo volunteer classifications, to identify (strongly and weakly) barred and unbarred disc galaxies in Hyper Suprime-Cam Subaru Strategic Program i-band images. We select AGN using three independent diagnostics: mid-infrared colours, X-ray detections, and spectral energy distribution (SED) fitting. The SED analysis, performed using CIGALE, quantifies the relative AGN contribution to the total galaxy luminosity (f_AGN_) and the AGN luminosity (L_disc_). We assess the impact of bars by comparing AGN incidence and properties in barred galaxies against carefully constructed redshift-, stellar mass-, and colour-matched unbarred control samples. Our binary AGN classification experiment demonstrates that barred disc galaxies host a higher fraction of AGN compared to their unbarred counterparts, though the significance depends on the AGN selection method, with a more modest excess for SED AGN, and control sample size. This suggests a contributing role for bars in the global AGN budget. The contribution of bars to AGN fuelling appears confined to systems where the AGN has a lower relative contribution to the host galaxy's emission (f_AGN_<0.75). Crucially, we find a significant dearth of barred disc galaxies hosting AGN with f_AGN_>0.75, independent of bar strength. Consistent with this, the fraction of barred galaxies among AGN hosts decreases with increasing L_disc_. Combined with previous results, we suggest that bars may contribute to fuelling the population of low-to-moderate luminosity AGN, but major mergers are the principal mechanism for triggering the most powerful and dominant accretion events.interacting-galaxiesactive-galactic-nucleiastrometryinfrared-photometrygalaxy-radiigalaxy-classification-systemshigh-energy-astrophysicsobservational-astronomygalactic-and-extragalactic-astronomyhttps://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/707/A152https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A1522026A&A...707A.152Lhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/707/A152Cone search capability for table J/A+A/707/A152/catalog (Master catalogue of N-W2 selected disc galaxies classified with Zoobot algorithm)La Marca A.Nardone M.T.Wang L.Margalef-Bentabol B.Kruk S.,Trager S.C.CDS2026https://cds.unistra.fr/vizier-org/licences_vizier.htmlCDS support team <cds-question@unistra.fr>DatasetAstroObjectsastronomy