Center for Computational Sciences

Galaxy formation and AGN Feedback
Alexander Y. Wagner
University of Tsukuba, Center for Computational Sciences
Theoretical Astrophysics Group
Dipanjan Mukherjee
Geoﬀrey Bicknell
Joe Silk
Raﬀaella MorgantiNicole Nesvadba
Masayuki Umemura
Rebekka Bieri
Yohan Dubois
Salvatore Cielo
Ralph Sutherland
宇宙史研究センター・シンポジウム

2019-11-21

Outline
Galaxy formation and AGN Feedback(Jet feedback)
Simulations of AGN jet feedback in spherical, gas-rich, forming galaxies
Simulations of AGN jet feedback in gas-rich, disc galaxies
Simulations of AGN radiation feedback in gas-rich, disc galaxies

Outline
Galaxy formation and AGN Feedback(Jet feedback)
Simulations of AGN jet feedback in spherical, gas-rich, forming galaxies
Simulations of AGN jet feedback in gas-rich, disc galaxies
Simulations of AGN radiation feedback in gas-rich, disc galaxies

Illustris simulation

Processes in galaxy
and BH formation
Dark Matter HalosMergers

Accretion

Outflows

CoolingStar formation

Dust and Metals
AGN

Supermassive Black HoleGalaxy

6

Gemini Observatory/AURA, artwork by Lynette Cook

How do AGN jets, winds and radiation aﬀect theevolution of galaxies?

(black hole mass)Black-hole galaxy co-evolution

Space density

Black holes (IR)Black holes (X-rays)
Black holes (X-rays)(galaxy mass)

Galaxies(star-formation)

AGN jet feedback and galaxy formation
GPS galaxy
MRC0406-244
z~2Interstellar
medium

~1 Mpc[OIII] velocity map~20 kpc

Cygnus A
Brightest Cluster
Central Galaxy

Intracluster
mediumOutline
Galaxy formation and AGN Feedback(Jet feedback)
Simulations of AGN jet feedback in spherical, gas-rich, forming galaxies
Simulations of AGN jet feedback in gas-rich, disc galaxies
Simulations of AGN radiation feedback in gas-rich, disc galaxies

AGN Jet Feedback in spherical, gas-rich forming galaxies
Mukherjee, Bicknell, AYW, MNRAS, 2016

AGN Jet Feedback in spherical, gas-rich forming galaxies
Mukherjee, Bicknell, AYW, MNRAS, 2016• 20 simulations with turbulent interstellar gas,over a 5 kpc volume.

• Strong negative feedback forPjet > 1044 erg s-1.

• Galactic fountains, stifled jets.
• Mass ejection is very inefficient.

Outline
Galaxy formation and AGN Feedback(Jet feedback)
Simulations of AGN jet feedback in spherical, gas-rich, forming galaxies
Simulations of AGN jet feedback in gas-rich, disc galaxies
Simulations of AGN radiation feedback in gas-rich, disc galaxies

Jet feedback in disk galaxies (Mukherjee et al 2018)
Relativistic-hydrodynamical simulations

Pjet=1045 erg s-1

Contours: β = 0.4c, 0.87c• Central outflow < 1kpc
• Compression & shocks on outer edges

Jet feedback in disk galaxies Dependence on inclination angle
Relativistic-hydrodynamical simulations

Jet feedback in disk galaxies
Dependence on inclination angle

Jet feedback in disk galaxies

Jet-induced star-formation

Outline
Galaxy formation and AGN Feedback(Jet feedback)
Simulations of AGN jet feedback in spherical, gas-rich, forming galaxies
Simulations of AGN jet feedback in gas-rich, disc galaxies
Simulations of AGN radiation feedback in gas-rich, disc galaxies

Radiation-hydrodynamic simulations of AGN quasar Feedback
Bieri, Dubois, AYW, Silk et al, MNRAS, 2017

• First radiation hydrodynamic
simulations of AGN quasar
feedback in a multiphasemedium.

• Radiative transfer was solved

with the M1 scheme for infrared
to UV photons.

• Sub-grid treatment for infrared
scattering on dust. (Trapped /free-streaming photons.)Radiation-hydrodynamic simulations of AGN quasar Feedback
Bieri, Dubois, AYW, Silk et al, MNRAS, 2017

mediumCbigC

The momentum boost of the outflow
poutflow / (LAGN / c) ~ 20smallC• Identified roles of ISM properties and photon groups.

Summary• AGN jets interact strongly with the interstellar medium because‣ jets are light and easily deflected‣ jets engulf clouds in thermal (over)pressure (100×) that cause cloud compression and star-formation‣ jets carry ram pressure that disperses and accelerates clouds‣ jets can be highly inclined w.r.t. disc. The more inclined they are the more “damage”.
• AGN jets induce a lot of turbulence in this disc.

➡ Unexplored mode of negative and positive feedback• AGN jets in discs can induce star-formation, in particular in the first few Myrs
• AGN radiation is efficient in heating and dispersing the interstellar medium
through multiply-scattering infrared photons.