black hole immigrants welcome in the galactic center€¦ · rlfilling. final configuration for...
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Bode (1774)
Collaborators: Holger Baumgardt Toshi Ebisuzaki Ortwin Gerhard Alessia Gualandris Piet Hut Jun Makino Steve McMillan
Black Hole Immigrants welcome in the Galactic center
Simon Portegies ZwartUniversity of Amsterdam
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M80
Arches
Quintplet
R136
NGC 3603
30 pc
~1 000 000 Msun
Trapezium
Wstrlnd1
MG
G11
5pc
Pleiades
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Myr
100Myr
100Myr
Core collapse in a realistic clusterhappens much earlier than in an idealized system. The collapse itself, however, is much shallower.
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Portegies Zwart et al 2004Remember: John Fregeau's talk!
supernovae
starlab/kira
6NBODY
High concentration
M82 X1Matsumoto1999
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Figer et al 1999Arches clusterQuintuplet
IRS13 (Maillard 2005)
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SupermassiveBlack hole
Star cluster
1100pc
Background galaxy
In the tidal field of the Galaxy
N=1128kWo=312RLfilling
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Final configurationfor R=8pc N=64k W=3Dissolved at ~4pcBut made IMBH
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45.000Msun star cluster sinking from 2pc to the Galactic center.
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N=131074
Mbh = 1000Msun
Mbh = 3000Msun
See also Gurkan 2005, Levin 2005, Hansen 2006
Portegies Zwart et al 2005
Baumgardt et al 2006
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A total of 7 HVSs (v>700km/s) are found (Brown et al 2005, 2006)
10000Msun
1000Msun
Baumgardt etal (in prep)See also Levin 2005, 2006and Gnedin 2005
Binary breakupHills 1989, Yu&Tremaine 1994
IMBH spiralin
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Results and future prospects● About 10.000 star clusters formed within 100pc● 510% of these experience runaway collision● Producing IMBHs of 3003000Msun● At any time there are ~50 IMBHs within the
inner 10pc, and several within the inner mpc● One in 30 IMBHs is still accompanied by a
young (<30Myr) star cluster which is unusually rich in massive (>10Msun) stars, much like IRS13
● The rate at which the IMBHs fall in the SMBH is roughly 1/10Myr