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Models of Faint Galaxy Production through Star Cluster Evolution Jarrod Hurley (Centre for Astrophysics & Supercomputing) “Dynamics of Low-Mass Stellar.

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Presentation on theme: "Models of Faint Galaxy Production through Star Cluster Evolution Jarrod Hurley (Centre for Astrophysics & Supercomputing) “Dynamics of Low-Mass Stellar."— Presentation transcript:

1 Models of Faint Galaxy Production through Star Cluster Evolution Jarrod Hurley (Centre for Astrophysics & Supercomputing) “Dynamics of Low-Mass Stellar Systems” ESO, Santiago, Chile April

2 Models of Faint Galaxy Production through Star Cluster Evolution Sizes of low-mass stellar systems Huxor+11

3 Models of Faint Galaxy Production through Star Cluster Evolution Sizes of low-mass stellar systems Huxor+11 MW M31

4 Models of Faint Galaxy Production through Star Cluster Evolution Sizes of low-mass stellar systems Huxor+11 MW M31 dIrr

5 Models of Faint Galaxy Production through Star Cluster Evolution Sizes of low-mass stellar systems Huxor+11 M31 dIrr DM halo MW M31

6 Models of Faint Galaxy Production through Star Cluster Evolution simulations of low-mass stellar systems in different tidal fields Huxor+11 M31 dIrr DM halo MW M31

7 Models of Faint Galaxy Production through Star Cluster Evolution N-body simulation background Equation of Motion O(N 3 ) special-purpose GRAPE hardware stellar evolution binary evolution techniques for few-body subsystems tidal field [Hurley et al. 2001] [Mardling & Aarseth 2001; Mikkola 2006, etc.] [ NBODY4/NBODY6: Aarseth 1999; Aarseth 2003] GPU

8 Models of Faint Galaxy Production through Star Cluster Evolution Models of Extended Clusters? N = 100,000, 5% binaries, Z = 0.001, KTG IMF, Plummer/King

9 Models of Faint Galaxy Production through Star Cluster Evolution Models of Extended Clusters? N = 100,000, 5% binaries, Z = 0.001, KTG IMF, Plummer/King R GC = 10 kpc M G = 9x10 9 M sun M = 9x10 10 M sun point-mass point-mass or 3-component e.g. NGC6822 e.g. M31

10 Models of Faint Galaxy Production through Star Cluster Evolution Models of Extended Clusters? N = 100,000, 5% binaries, Z = 0.001, KTG IMF, Plummer/King e.g. NGC6822 e.g. M31

11 Models of Faint Galaxy Production through Star Cluster Evolution Models of Extended Clusters? N = 100,000, 5% binaries, Z = 0.001, KTG IMF, Plummer/King Hurley+Mackey10

12 Models of Faint Galaxy Production through Star Cluster Evolution Models of Extended Clusters? Da Costa+09

13 Models of Faint Galaxy Production through Star Cluster Evolution Models of Extended Clusters? Da Costa+09

14 Models of Faint Galaxy Production through Star Cluster Evolution The N = 200,000 model 200k 2% binaries R gc = 4 kpc 100k 5% binaries R gc = 8.5 kpc

15 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? size/pc sigma ~ 3-10 km/s Strigari+08

16 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? M NFW = 10 9 c = 16 R gc = 0.5 kpc

17 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? M NFW = 10 9 c = 16 R gc = 0.5 kpc

18 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? M NFW = 10 9 c = 16 R gc = 0.5 kpc

19 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? M NFW = 10 9 c = 16 R gc = 0.5 kpc

20 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20 N = 100,000, 5% binaries N = 28,000, 40% binaries

21 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20

22 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20

23 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20

24 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20

25 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20 Sand+10 Leo IV

26 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20

27 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20 r pl = 27 pc r pl = 15 pc

28 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? N = 100,000, 5% binaries N = 28,000, 40% binaries Star cluster near centre (R gc =20pc), M NFW = 10 8, c=20 Martin+08

29 Models of Faint Galaxy Production through Star Cluster Evolution Models of Ultra-Faint Dwarfs? M 300 ~ 0.7x10 7 M sun sigma ~ 5 km/s

30 Models of Faint Galaxy Production through Star Cluster Evolution Future … complex tidal fields definition of tidal radius? explore initial N, f b, density, sigma … non-virial protoclusters, e.g. Hurley+Bekki08 include gas? …

31 N-body simulation background


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