The Eris Project: the effects of baryons on the subhaloes of - PowerPoint PPT Presentation

The Eris Project: the effects of baryons on the subhaloes of MW-like galaxies ANNALISA PILLEPICH (UCSC) with Javiera Guedes, Sijing Shen, Mike Kuhlen, Piero Madau, Lucio Mayer, Simone Callegari, Valery Rashkov Zoom-in simulation N-body/SPH: PKDGRAV/GASOLINE Halo Finder: Amiga Halo Finder Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

The simulation Eris Recipe: 20 Mpc (Guedes et al 2011, ApJ 742, 76) ErisDark Eris • radiative cooling (Compton, atomic, low T metallicity-dependent) • heating from cosmic UV (~ Haardt & Madau 1996) • Supernova feedback ( ε SN = 0.8) (Stinson et al. 2006) • Star Formation: • threshold n SF = 5 atoms/cm3 • efficiency ε SF = 0.1 • IMF: Kroupa et al. 1993 NO AGN feedback 600 kpc ErisDark: DM only Eris: DM, gas, stars DM-only Density Field Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Eris MWs Vmax ErisDark: DM only Eris: DM, gas, stars DM-only Density Field Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Eris MWs T O T M a ss 12 10 10 10 R v i r ( k p c) M ( M s un ) B a r y o n F r a c t i o n 0.16 2 10 0.15 0.14 0.13 f b 0.12 8 10 0.11 0.1 ErisDark 0.09 T O T E r i s D a r k E r i s 0.08 D M E r i s D a r k : R v i r = 246.59 0.2 0.4 0.6 0.8 1 Eris a G A S E r i s : R v i r = 234.77 S T A R S 0.2 0.4 0.6 0.8 1 0.2 0.4 0.6 0.8 1 a a Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Eris MWs E r i s .00001 a t z = 0.0 E r i s .00001 a t z = 0.0 10 T O T T O T 250 10 D M D M G A S G A S S T A R S S T A R S 8 10 200 � ( M s un / k p c 3 ) V c i r c ( k m / s ) 6 10 150 P o w e r : 2003 = ~ D i e m a n d : 2004 4 10 100 2 10 50 s of t e n i n g 0 10 0 0 1 2 0 10 20 30 40 50 10 10 10 R ( k p c) R ( k p c) Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Eris MWs E r i s .00001 a t z = 0.0 E r i s .00001 a t z = 0.0 10 T O T T O T 250 10 D M D M G A S G A S S T A R S S T A R S 8 10 200 � ( M s un / k p c 3 ) V c i r c ( k m / s ) 6 10 150 P o w e r : 2003 = ~ D i e m a n d : 2004 4 10 100 2 10 50 s of t e n i n g 0 10 0 0 1 2 0 10 20 30 40 50 10 10 10 R ( k p c) R ( k p c) Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Eris MWs z = 0.0 10 T O T 10 Convergence Estimate D M G A S 8 Eris Dark Low Resolution S T A R S 10 9.5 10^5 Msun � ( M s un / k p c 3 ) 495 pc 6 10 D i e m a n d : 2004 4 10 P o w e r : 2003 = ~ > 0.9 kpc ~ 8 x softening! 2 10 3 x s of t e n i n g 0 10 0 2 10 10 R (co m k p c) Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Eris Satellites z = 0.0 E r i s D a r k : 590 60 E r i s : 432 40 N 20 0 0 100 200 300 400 500 600 700 800 400 V r e l , M W ( k m / s ) E r i s D a r k 200 590 0 − 200 − 400 0 100 200 300 400 500 600 700 800 400 V r e l , M W ( k m / s ) E r i s 200 432 0 − 200 − 400 0 100 200 300 400 500 600 700 800 d M W ( k p c) Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Eris Satellites z = 0.0 E r i s D a r k : 590 60 E r i s : 432 • N TOT > 100, AHF 40 N Analog pairs by DM particle 20 tracking 0 0 100 200 300 400 500 600 700 800 400 • Effective high-res region no V r e l , M W ( k m / s ) E r i s D a r k further than 850 kpc.... 200 590 0 • Many categories of objects! − 200 − 400 • Satellite Definition at z=0: 0 100 200 300 400 500 600 700 800 400 - within Rvir at any given z V r e l , M W ( k m / s ) E r i s 200 - within Rvir ever 432 0 − 200 − 400 0 100 200 300 400 500 600 700 800 d M W ( k p c) Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

ErisDark Subhaloes E r i s D a r k s u b h a l o f un c t i o n a t z = 0 3 10 E r i s D a r k w i t h i n R 200 V L II w i t h i n R 200 2 10 N ( > V m a x ) 1 10 0 10 1 10 V m a x ( k m / s ) Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

ErisDark Subhaloes E r i s D a r k s u b h a l o f un c t i o n a t z = 0 3 10 E r i s D a r k w i t h i n R 200 V L II w i t h i n R 200 m a x ) N ( > V m a x / V h o s t 2 10 1 10 0 10 − 2 − 1 10 10 V m a x / V h o s t m a x Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

ErisDark Subhaloes E r i s D a r k a n d V L II a t z = 0, w i t h i n R 200 3 10 N ( > r e l a t i v e V m a x ) 2 10 V V L II m a x = 201 k m / s ; V V L II = 144 k m / s v i r V E r i s D a r k = 166 k m / s ; V E r i s D a r k = 117 k m / s m a x v i r 1 10 E r i s D a r k , n o r m a li z e d t o V h o s t m a x V L II , n o r m a li z e d t o V h o s t m a x E r i s D a r k , n o r m a li z e d t o V h o s t v i r V L II , n o r m a li z e d t o V h o s t v i r 0 10 − 2 − 1 10 10 r e l a t i v e V m a x Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

ErisDark Subhaloes E r i s D a r k a n d V L II a t z = 0, w i t h i n R 200 3 10 N ( > r e l a t i v e V m a x ) - resolution??? 2 ?!?!? 10 - unlucky realization? V V L II m a x = 201 k m / s ; V V L II = 144 k m / s v i r V E r i s D a r k = 166 k m / s ; V E r i s D a r k = 117 k m / s m a x v i r 1 10 E r i s D a r k , n o r m a li z e d t o V h o s t m a x V L II , n o r m a li z e d t o V h o s t m a x E r i s D a r k , n o r m a li z e d t o V h o s t v i r V L II , n o r m a li z e d t o V h o s t v i r 0 10 − 2 − 1 10 10 r e l a t i v e V m a x Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Excursus: scatter in the subhalo velocity function (I) Bolshoi Simulation , analyzed with Rockstar by P . Berhoozi Thanks to (L = 250 Mpc/h, N = 2048^3, m_DM = 1.35 10^8 Msun/h, 1 phys kpc/h) Joel and Peter Typical DM subhalo abundance functions, for cluster-size hosts: B o l s h o i a t z = 0 : 1.58 e + 14 < M h o s t <= 2.51 e + 14 M s un 3 3 3 10 10 10 2 2 2 10 10 10 N ( > V m a x ) 1 1 1 10 10 10 N h o s t s = 99 0 0 0 10 10 10 2 − 2 − 1 − 2 − 1 10 10 10 10 10 V m a x /V h o s t V m a x /V h o s t V m a x ( k m / s ) = = m a x v i r μ max μ vir Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Excursus: scatter in the subhalo velocity function (II) B o l s h o i a t z = 0 : 1.45 e + 14 < M h o s t <= 1.73 e + 14 M s un Different host-masses: 3 3 3 10 10 10 N h o s t s = 56 2 2 2 10 10 10 N ( > V m a x ) 1 1 1 10 10 10 0 0 0 10 10 10 − 1 − 1 − 1 10 10 10 1 2 3 − 1 − 1 10 10 10 10 10 V m a x /V h o s t V m a x /V h o s t V m a x ( k m / s ) smaller hosts m a x v i r B o l s h o i a t z = 0 : 1.54 e + 13 < M h o s t <= 1.75 e + 13 M s un 3 3 3 10 10 10 N h o s t s = 547 2 2 2 10 10 10 N ( > V m a x ) 1 1 1 10 10 10 0 0 0 10 10 10 − 1 − 1 − 1 10 10 10 1 2 3 − 1 − 1 10 10 10 10 10 V m a x /V h o s t V m a x /V h o s t V m a x ( k m / s ) m a x v i r B o l s h o i a t z = 0 : 1.95 e + 12 < M h o s t <= 2.00 e + 12 M s un 3 3 3 10 10 10 N h o s t s = 875 2 2 2 10 10 10 N ( > V m a x ) 1 1 1 10 10 10 0 0 0 10 10 10 − 1 − 1 − 1 10 10 10 1 2 3 − 1 − 1 10 10 10 10 10 V m a x /V h o s t V m a x /V h o s t V m a x ( k m / s ) m a x v i r Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012

Excursus: scatter in the subhalo velocity function (III) B o l s h o i a t z = 0 : 1.45 e + 14 < M h o s t <= 1.73 e + 14 M s un Different host-masses: 3 3 3 10 10 10 N h o s t s = 56 2 2 2 10 10 10 N ( > V m a x ) 1 1 1 10 10 10 0 0 0 10 10 10 completeness/ − 1 − 1 − 1 10 10 10 1 2 3 − 1 − 1 resolution limit: 10 10 10 10 10 V m a x /V h o s t V m a x /V h o s t V m a x ( k m / s ) smaller hosts m a x v i r B o l s h o i a t z = 0 : 1.54 e + 13 < M h o s t <= 1.75 e + 13 M s un where? 3 3 3 10 10 10 50 km/s? N h o s t s = 547 100 km/s? 2 2 2 10 10 10 N ( > V m a x ) 1 1 1 10 10 10 0 0 0 10 10 10 − 1 − 1 − 1 10 10 10 1 2 3 − 1 − 1 10 10 10 10 10 V m a x /V h o s t V m a x /V h o s t V m a x ( k m / s ) m a x v i r B o l s h o i a t z = 0 : 1.95 e + 12 < M h o s t <= 2.00 e + 12 M s un 3 3 3 10 10 10 N h o s t s = 875 2 2 2 10 10 10 N ( > V m a x ) 1 1 1 10 10 10 0 0 0 10 10 10 − 1 − 1 − 1 10 10 10 1 2 3 − 1 − 1 10 10 10 10 10 V m a x /V h o s t V m a x /V h o s t V m a x ( k m / s ) m a x v i r Eris Project: the effects of baryons on MW galaxies Annalisa Pillepich, August 2012