Simulations of AGN jets on 100 kpc scaleQNQ/Slides/SalvatoreCielo.pdf · Salvatore Cielo - Q&Q - 2014-07-15 Results: Energy and Volume Coverage 7 “p dV” Mechanical Work as fraction

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Salvatore Cielo - Q&Q - 2014-07-15

Simulations of AGN jetson 100 kpc scale

Salvatore Cielo, MPIA Heidelberg, DEAndrea V. Macciò, MPIA Heidelberg, DE

Vincenzo Antonuccio-Delogu, INAF, Catania, IT


Why are Jets so mysterious?

2

Jet powers are well constrained, but ...



2

?Several unknowns




2

?Several unknowns

Duty cycleslink to BH accretion




2

?Several unknowns


FRI / FR IIintrinsic or environment?




2

?Several unknowns




Composition / EoSlight/hard:

Blandford-ZnajekVS

Blandford-Payne Blan

dfor

d, Z

naje

k 19

77



2

?Several unknowns




Observations: obscured, sparse, small scale gas.

Simulations: need to linkseveral physical scales.

Composition / EoSlight/hard:

Blandford-ZnajekVS

Blandford-Payne Blan

dfor

d, Z

naje

k 19

77


So, can jets from AGNs...

3

IN GALAXIES, few Myr...directly reduce SF?

(positive VS negative FB)



3



V. Gaibler (+), 2014 (12), ...

Silk + 2013,Dubois + 2013, ...



3


IN HALOS, >100 Myr...prevent cool flows by heat?


V. Gaibler (+), 2014 (12), ...

Silk + 2013,Dubois + 2013, ...



3


IN HALOS, >100 Myr...prevent cool flows by heat?


V. Gaibler (+), 2014 (12), ...

Silk + 2013,Dubois + 2013, ...

Perseus cluster~150 kpcCHANDRAnasa.gov

Complex heating mechanisms (bubbles, etc.)invoked with little testing


• Dark Matter NFW potential(static, spherical, external)

• Hot haloIsothermal, self-grav + DMhydrostatic equilibrium, rad. cooling

(e.g. Mhalo = 2e12 Msun => T ~ 5e6 K)

My setup, in the FLASH code

4






4

• Jet density contrast 1:100Pjet = ρjet A vjet3 = 1e42-1e46 erg/s FRI/FRII: Mach 5 - Mach 100on/off cycles: 1-100 Myr

Box: 60-640kpc Resolution:10-150 pc

FRII: recollimation

shocks






4

• Warm gas clouds (1e4 K)in a central galaxy + SF with sink particles. One day.

• Jet density contrast 1:100Pjet = ρjet A vjet3 = 1e42-1e46 erg/s FRI/FRII: Mach 5 - Mach 100on/off cycles: 1-100 Myr

Box: 60-640kpc Resolution:10-150 pc

FRII: recollimation

shocks

Salvatore Cielo - Q&Q - 2014-07-15 5

Results: Evolutionary stages


1042 erg/s120 kpc



1. Cocoonand HSformation


1042 erg/s120 kpc




2. Forwardpropagation


1042 erg/s120 kpc





3. Lobesinflation


1042 erg/s120 kpc





3. Lobesinflation

4. Bubbles(jet off)


1042 erg/s120 kpc


Bubbles still there after .6 Gyr

6


Results: Energy and Volume Coverage

7

“p dV” Mechanical Workas fraction of Pjet

100 1020

0.2

0.4

0.6

0.8

1

tage / Myr

Cou

plin

g:

(Wpd

V / t ag

e) / P

jet

1E45 erg/s1E44 erg/s1E43 erg/s1E42 erg/s

All gas

Lobes/Bubbles only

Cielo +, in prep.



7


100 1020

0.2

0.4

0.6

0.8

1

tage / Myr

Cou

plin

g:

(Wpd

V / t ag

e) / P

jet


All gas

Lobes/Bubbles only

101 1020

0.2

0.4

0.6

0.8

1

tage / Myr

V C30 k

pc /

V sphe

re 30

kpc

Low res


Volume coverage within rCool ~30kpc (2e12 MSun)

Cielo +, in prep.



7


100 1020

0.2

0.4

0.6

0.8

1

tage / Myr

Cou

plin

g:

(Wpd

V / t ag

e) / P

jet


All gas

Lobes/Bubbles only

101 1020

0.2

0.4

0.6

0.8

1

tage / Myr

V C30 k

pc /

V sphe

re 30

kpc

Low res


Volume coverage within rCool ~30kpc (2e12 MSun)

FRII can make it... FRI not large enough!

Cielo +, in prep.


Results: angle flip

8

Can the volume fraction increase with multiple injections?


1045 erg/s~150 kpc


Results: angle flip

8

Can the volume fraction increase with multiple injections? Not really... :(


1045 erg/s~150 kpc


• Can we simulate AGNs radio mode with AMR?

• self-consistently?

• Do jets have enough energy?

• Do they affect enough volume in the ISM?

Summary

9

Documents

Simulations of AGN jets on 100 kpc scaleQNQ/Slides/SalvatoreCielo.pdf · Salvatore Cielo - Q&Q - 2014-07-15 Results: Energy and Volume Coverage 7 “p dV” Mechanical Work as fraction