Sanchez, NN;
Werk, JK;
Tremmel, M;
Pontzen, A;
Christensen, C;
Quinn, T;
Cruz, A;
(2019)
Not So Heavy Metals: Black Hole Feedback Enriches the Circumgalactic Medium.
Astrophysical Journal
, 882
(1)
, Article 8. 10.3847/1538-4357/ab3045.
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Abstract
We examine the effects of supermassive black hole (SMBH) feedback on the circumgalactic medium (CGM) using a cosmological hydrodynamic simulation (Romulus25) and a set of four zoom-in "genetically modified" Milky-Way–mass galaxies sampling different evolutionary paths. By tracing the distribution of metals in the CGM, we show that O vi is a sensitive indicator of SMBH feedback. First, we calculate the column densities of O vi in simulated Milky-Way–mass galaxies and compare them with observations from the COS-Halos Survey. Our simulations show column densities of O vi in the CGM consistent with those of COS-Halos star-forming and quenched galaxies. These results contrast with those from previous simulation studies which typically underproduce CGM column densities of O vi. We determine that a galaxy's star formation history and assembly record have little effect on the amount of O vi in its CGM. Instead, column densities of O vi are closely tied to galaxy halo mass and BH growth history. The set of zoom-in, genetically modified Milky-Way–mass galaxies indicates that the SMBH drives highly metal-enriched material out into its host galaxy's halo, which in turn elevates the column densities of O vi in the CGM.
| Type: | Article |
|---|---|
| Title: | Not So Heavy Metals: Black Hole Feedback Enriches the Circumgalactic Medium |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4357/ab3045 |
| Publisher version: | https://doi.org/10.3847/1538-4357/ab3045 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, galaxies: halos, galaxies: kinematics and dynamics, galaxies: spiral, intergalactic medium, methods: numerical, ABSORPTION-LINE, O VI, SPATIAL EXTENT, GALAXY, MASS, SIMULATIONS, MODELS, HALOS, COEVOLUTION, ABUNDANCE |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10084472 |
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