UNLEASHING POSITIVE FEEDBACK: LINKING THE RATES OF STAR FORMATION, SUPERMASSIVE BLACK HOLE ACCRETION, AND OUTFLOWS IN DISTANT GALAXIES

By J. Silk. 2013

150 citations recorded by the source corpus.

Pressure-regulated star formation is a simple variant on the usual supernova-regulated star formation efficiency that controls the global star formation rate as a function of cold gas content in star-forming galaxies, and accounts for the Schmidt–Kennicutt law in both nearby and distant galaxies. Inclusion of active galactic nucleus (AGN) induced pressure, by jets and/or winds that flow back onto a gas-rich disk, can lead, under some circumstances, to significantly enhanced star formation rates, especially at high redshift and most likely followed by the more widely accepted phase of star formation quenching. Simple expressions are derived that relate supermassive black hole growth, star formation, and outflow rates. The ratios of black hole to spheroid mass and of both black hole accretion and outflow rates to star formation rate are predicted as a function of time. I suggest various tests of the AGN-triggered star formation hypothesis.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/bb2bba3e956ebe2726fd26a3a6de708fd3194907

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In Astronomy and Astrophysics

1. P. Hopkins
2. D. M. Alexander
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4. D. Narayanan
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Citations in the corpus

• The Coevolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe (2014, background): “While AGN feedback is generally assumed to be negative (inhibiting star-formation and/or black hole growth), it could also be positive in nature (e.g. Ishibashi & Fabian 2012, Silk 2013, Zinn et al. 2013).”
• Hot Accretion Flows Around Black Holes (2014, background): “However, momentum feedback can more effectively push the surrounding gas and may be equally important for controlling the growth of the black hole and switching off star formation (King 2003, 2005, 2010; Ostriker et al. 2010; Debuhr et al. 2010; Silk 2013).”
• Blossoms from black hole seeds: properties and early growth regulated by supernova feedback (2016, background): “BHs power active galactic nuclei (AGN) and quasars, therefore driving feedback onto their host galaxies, believed to be key in shaping the massive end of the galaxy stellar mass function (Croton et al. 2006; Silk 2013).”
• The Karl G. Jansky Very Large Array Sky Survey (VLASS). Science Case and Survey Design (2019, background): “Recent studies from both a theoretical (Silk 2013) and observational (Kalfountzou et al. 2012, 2014) perspective have shown that powerful radio- loud AGN may actually provide a positive form of feedback.”
• The ALPINE-ALMA [CII] survey (2020, background): “We expect this to be tempered by feedback processes from gas expelled from galaxies by strong AGN or stellar jets and winds (Silk 1997, 2013; Hopkins et al. 2008).”