Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction
Feedback from central supermassive black holes is often invoked to explain the low star formation rates (SFRs) in the massive galaxies at the centers of galaxy clusters. However, the detailed physics of the coupling of the injected feedback energy with the intracluster medium (ICM) is still unclear....
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2017
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| Online Access: | http://hdl.handle.net/1721.1/109697 https://orcid.org/0000-0002-3074-2326 https://orcid.org/0000-0001-8593-7692 |
| _version_ | 1811069170269290496 |
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| author | Kannan, Rahul Vogelsberger, Mark Pfrommer, Christoph Weinberger, Rainer Springel, Volker Hernquist, Lars Puchwein, Ewald Pakmor, Rüdiger |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Kannan, Rahul Vogelsberger, Mark Pfrommer, Christoph Weinberger, Rainer Springel, Volker Hernquist, Lars Puchwein, Ewald Pakmor, Rüdiger |
| author_sort | Kannan, Rahul |
| collection | MIT |
| description | Feedback from central supermassive black holes is often invoked to explain the low star formation rates (SFRs) in the massive galaxies at the centers of galaxy clusters. However, the detailed physics of the coupling of the injected feedback energy with the intracluster medium (ICM) is still unclear. Using high-resolution magnetohydrodynamic cosmological simulations of galaxy cluster formation, we investigate the role of anisotropic thermal conduction in shaping the thermodynamic structure of clusters, and in particular, in modifying the impact of black hole feedback. Stratified anisotropically conducting plasmas are formally always unstable, and thus more prone to mixing, an expectation borne out by our results. The increased mixing efficiently isotropizes the injected feedback energy, which in turn significantly improves the coupling between the feedback energy and the ICM. This facilitates an earlier disruption of the cool-core, reduces the SFR by more than an order of magnitude, and results in earlier quenching despite an overall lower amount of feedback energy injected into the cluster core. With conduction, the metallicity gradients and dispersions are lowered, aligning them better with observational constraints. These results highlight the important role of thermal conduction in establishing and maintaining the quiescence of massive galaxies. |
| first_indexed | 2024-09-23T08:06:48Z |
| format | Article |
| id | mit-1721.1/109697 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:06:48Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1096972022-09-23T11:00:08Z Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction Kannan, Rahul Vogelsberger, Mark Pfrommer, Christoph Weinberger, Rainer Springel, Volker Hernquist, Lars Puchwein, Ewald Pakmor, Rüdiger Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Kannan, Rahul Vogelsberger, Mark Feedback from central supermassive black holes is often invoked to explain the low star formation rates (SFRs) in the massive galaxies at the centers of galaxy clusters. However, the detailed physics of the coupling of the injected feedback energy with the intracluster medium (ICM) is still unclear. Using high-resolution magnetohydrodynamic cosmological simulations of galaxy cluster formation, we investigate the role of anisotropic thermal conduction in shaping the thermodynamic structure of clusters, and in particular, in modifying the impact of black hole feedback. Stratified anisotropically conducting plasmas are formally always unstable, and thus more prone to mixing, an expectation borne out by our results. The increased mixing efficiently isotropizes the injected feedback energy, which in turn significantly improves the coupling between the feedback energy and the ICM. This facilitates an earlier disruption of the cool-core, reduces the SFR by more than an order of magnitude, and results in earlier quenching despite an overall lower amount of feedback energy injected into the cluster core. With conduction, the metallicity gradients and dispersions are lowered, aligning them better with observational constraints. These results highlight the important role of thermal conduction in establishing and maintaining the quiescence of massive galaxies. 2017-06-07T13:48:34Z 2017-06-07T13:48:34Z 2017-06-07 Article http://purl.org/eprint/type/JournalArticle 2041-8205 2041-8213 http://hdl.handle.net/1721.1/109697 Kannan, Rahul; Vogelsberger, Mark; Pfrommer, Christoph; Weinberger, Rainer; Springel, Volker; Hernquist, Lars; Puchwein, Ewald and Pakmor, Rüdiger. “Increasing Black Hole Feedback-Induced Quenching with Anisotropic Thermal Conduction.” The Astrophysical Journal 837, no. 2 (March 2017): L18 © 2017 The American Astronomical Society https://orcid.org/0000-0002-3074-2326 https://orcid.org/0000-0001-8593-7692 en_US http://dx.doi.org/10.3847/2041-8213/aa624b Astrophysical Journal. Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Kannan, Rahul Vogelsberger, Mark Pfrommer, Christoph Weinberger, Rainer Springel, Volker Hernquist, Lars Puchwein, Ewald Pakmor, Rüdiger Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction |
| title | Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction |
| title_full | Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction |
| title_fullStr | Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction |
| title_full_unstemmed | Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction |
| title_short | Increasing Black Hole Feedback-induced Quenching with Anisotropic Thermal Conduction |
| title_sort | increasing black hole feedback induced quenching with anisotropic thermal conduction |
| url | http://hdl.handle.net/1721.1/109697 https://orcid.org/0000-0002-3074-2326 https://orcid.org/0000-0001-8593-7692 |
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