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The $z$~0.1 type-2 QSO J1430+1339 (the 'Teacup') is a complex galaxy showinga loop of ionised gas ~10 kpc in diameter, co-spatial radio bubbles, a compact(~1 kpc) jet, and outflow activity. We used VLT/MUSE optical integral fieldspectroscopic observations to characterise the properties and effects of thegalactic ionised outflow from kpc up to tens of kpc scales and compare themwith those of the radio jet. We detect a velocity dispersion enhancement (>300km/s) elongated over several kpc perpendicular to the radio jet, the AGNionisation lobes, and the fast outflow, similar to what is found in othergalaxies hosting compact, low-power jets, indicating that the jet stronglyperturbs the host ISM. The mass outflow rate decreases with distance from thenucleus, from around 100 $M_\odot$/yr in the inner 1-2 kpc to <0.1 $M_\odot$/yrat 30 kpc. The ionised mass outflow rate is ~1-8 times higher than themolecular one, in contrast with what is often quoted in AGN. The driver of themulti-phase outflow is likely a combination of AGN radiation and the jet. Theoutflow mass-loading factor (~5-10) and the molecular gas depletion time(<10$^8$ yr) indicate that the outflow can significantly affect the starformation and the gas reservoir in the galaxy. However, the fraction of theionised outflow that is able to escape the dark matter halo potential is likelynegligible. We detect blue-coloured continuum emission co-spatial with theionised gas loop. Here, stellar populations are younger (<100-150 Myr) than inthe rest of the galaxy (~0.5-1 Gyr). This constitutes possible evidence forstar formation triggered at the edge of the bubble due to the compressingaction of the jet and outflow ('positive feedback'), as predicted by theory.All in all, the Teacup constitutes a rich system in which AGN feedback fromoutflows and jets, in both its negative and positive flavours, co-exist.

astronomy and astrophysics

Complex AGN feedback in the Teacup galaxy. A powerful ionised galactic  outflow, jet-ISM interaction, and evidence for AGN-triggered star formation  in a giant bubble