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Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker...
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![Page 1: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/1.jpg)
subgrid modelsof
active galactic nuclei
inclusters of
galaxies
Paul Matthew Sutter Paul M. Ricker
Univ. of Illinois at Urbana-Champaign
Frontiers in Computational AstrophysicsLyon, France 10/14/2010
![Page 2: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/2.jpg)
clusters and cosmology
![Page 3: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/3.jpg)
why bother?
next-gen surveys will get ~10,000 clusters
significance will be reduced by systematics
must understand cluster astrophysics to constrain these systematics
magnetic fields play large role in cluster physics, but are poorly understood...
DES 500 Megapixel
camera at Blanco 4-meter telescope
5000 square-degree survey
![Page 4: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/4.jpg)
radio halos
Abell 2163
1.4Ghz Radio Contours (GMRT, India)
and ROSAT X-ray emission
(Feretti et al. 2001)
![Page 5: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/5.jpg)
radio mini-halos
(Burns et al. 1992, Sibring 1993)
(Fabian et al. 2000)
Perseus Cluster
![Page 6: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/6.jpg)
radio relics
Abell 2163
1.4Ghz Radio Contours (GMRT, India)
and ROSAT X-ray emission
(Bagchi et al. 2006)
![Page 7: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/7.jpg)
seeding magnetic fields
seeds via Biermann battery
amplification via stellar or AGN accretion disks
ejection via winds or AGN
![Page 8: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/8.jpg)
agn
![Page 9: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/9.jpg)
jet injection
Cattaneo & Teyssier (2007)
jet energy linked to accretion rate
assume entrainment factor
cylindrical feedback region
kinetic, thermal, and mass injection
jets point along axis
![Page 10: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/10.jpg)
magnetic field injection
Li et al. (2006)
appropriate for jets and bubbles
poloidal and toroidal components
assumes underlying dynamo-like system
free to choose scale radius, magnetic field strength
![Page 11: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/11.jpg)
FLASH
oct-tree adaptive mesh refinement
Gravity: N-body particle-mesh multigrid+pFFT
Hydro: PPM MHD: Constrained-
Transport SM sutherland & dopita
radiative cooling fast on-the-fly halo finding scales well to >200,000
processors
(Fryxell et al. 2000)
![Page 12: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/12.jpg)
test setup
mock 1014 Mʘ halo fixed NFW potential
(rs = 165 kpc)
rcool core = 40kpc
tcool ~ 6 Gyr
Mbh = 107 Mʘ
~0.5 kpc resolution
![Page 13: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/13.jpg)
injected magnetic field
![Page 14: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/14.jpg)
accretion rate
![Page 15: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/15.jpg)
magnetized cluster
![Page 16: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/16.jpg)
preliminary conclusions
magnetizing jets severely lowers accretion rates
magnetic energy much less than Liu et al. (2007), Xu et al. (2008)
can weakly magnetize entire cluster with jets, strong fields in cores (mini-halos?)
![Page 17: Subgrid models of active galactic nuclei in clusters of galaxies Paul Matthew Sutter Paul M. Ricker Univ. of Illinois at Urbana-Champaign Frontiers in.](https://reader035.fdocuments.us/reader035/viewer/2022062717/56649e4e5503460f94b44cdd/html5/thumbnails/17.jpg)
outro
clusters offer unique window on universe
must understand astrophysics to understand cosmology
magnetic fields impact cluster physics
simulations can help us understand magnetic fields