BLOWIN’ IN THE WIND: BOTH “NEGATIVE” AND “POSITIVE” FEEDBACK IN AN OBSCURED HIGH-z QUASAR

By G. Cresci, V. Mainieri, M. Brusa, A. Marconi, Michele Perna, F. Mannucci, E. Piconcelli, R. Maiolino, C. Feruglio, F. Fiore and 6 more. 2014

133 citations recorded by the source corpus.

Quasar feedback in the form of powerful outflows is invoked as a key mechanism to quench star formation in galaxies, preventing massive galaxies to overgrow and producing the red colors of ellipticals. On the other hand, some models are also requiring “positive” active galactic nucleus feedback, inducing star formation in the host galaxy through enhanced gas pressure in the interstellar medium. However, finding observational evidence of the effects of both types of feedback is still one of the main challenges of extragalactic astronomy, as few observations of energetic and extended radiatively driven winds are available. Here we present SINFONI near infrared integral field spectroscopy of XID2028, an obscured, radio-quiet z = 1.59 QSO detected in the XMM-COSMOS survey, in which we clearly resolve a fast (1500 km s−1) and extended (up to 13 kpc from the black hole) outflow in the [O iii] lines emitting gas, whose large velocity and outflow rate are not sustainable by star formation only. The narrow component of Hα emission and the rest frame U-band flux from Hubble Space Telescope/Advanced Camera for Surveys imaging enable to map the current star formation in the host galaxy: both tracers independently show that the outflow position lies in the center of an empty cavity surrounded by star forming regions on its edge. The outflow is therefore removing the gas from the host galaxy (“negative feedback”), but also triggering star formation by outflow induced pressure at the edges (“positive feedback”). XID2028 represents the first example of a host galaxy showing both types of feedback simultaneously at work.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/0bcd18c767341949d7cfe7a14dc043c0280401c4

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Citations in the corpus

Ionised outflows in z $\sim$ 2.4 quasar host galaxies (2015, background): “…Zaurín et al. 2014; Aalto et al. 2015; Feruglio et al. 2015) and at high redshift (e.g. Alexander et al. 2010; Nesvadba et al. 2011; Harrison et al. 2012; Maiolino et al. 2012; CanoDíaz et al. 2012; Harrison et al. 2014; Cresci et al. 2015; Cicone et al. 2015) in ionised, atomic and molecular gas.”
The SINS/zC-SINF Survey of z ∼ 2 Galaxy Kinematics: SINFONI Adaptive Optics–assisted Data and Kiloparsec-scale Emission-line Properties (2018, background): “…2014a), efficient removal of gas via powerful nuclear outflows (Förster Schreiber et al. 2014; Genzel et al. 2014b, see also Cano-Dı́az et al. 2012; Cresci et al. 2015; Brusa et al. 2015, 2016; Perna et al. 2015; Carniani et al. 2016), or central gas consumption (e.g., Tacchella et al. 2016;…”
The multi-phase winds of Markarian 231: from the hot, nuclear, ultra-fast wind to the galaxy-scale, molecular outflow (2015, background): “…ionized and neutral gas with similar velocities is found on galactic scale (1-30 kpc) in a few tens AGN from the local Universe up to z=2-3 (Cano-Diaz et al. 2012, Rupke & Veilleux 2011, 2013; Harrison et al. 2014; Nesvadba et al. 2008; Harrison et al. 2012; Genzel et al. 2014, Cresci et al. 2015).”
Impact of supermassive black hole growth on star formation (2017, background): “In some cases, observational papers have also reported evidence of regions of enhanced star formation due to AGNdriven outflows or jets, and even suppression and enhancement working simultaneously in the same galaxies[63, 64].”
AGN wind scaling relations and the co-evolution of black holes and galaxies (2017, background): “Cano-Diaz et al. (2012), Cresci et al. (2015), and Carniani et al. (2016) have found that AGN winds and actively star-forming regions are spatially anti-correlated.”