The ecology of star clusters and intermediate mass black holes in the Galactic bulge

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

26 pages, ApJ in press. Old title: The Galactic center welcomes black hole immigrants

Scientific paper

10.1086/500361

We simulate the inner 100pc of the Milky-Way Galaxy to study the formation and evolution of the population of star clusters and intermediate mass black holes. For this study we perform extensive direct N-body simulations of the star clusters which reside in the bulge, and of the inner few tenth of parsecs of the super massive black hole in the Galactic center. In our N-body simulations the dynamical friction of the star cluster in the tidal field of the bulge are taken into account via (semi)analytic soluations. The N-body calculations are used to calibrate a (semi)analytic model of the formation and evolution of the bulge. We find that about 10% of the clusters born within 100pc of the Galactic center undergo core collapse during their inward migration and form intermediate-mass black holes (IMBHs) via runaway stellar merging. After the clusters dissolve, these IMBHs continue their inward drift, carrying a few of the most massive stars with them. We predict that region within about 10 parsec of the SMBH is populated by about 50IMBHs of some 1000Msun. Several of these are expected to be accompanied still by some of the most massive stars from the star cluster. We also find that within a few milliparsec of the SMBH there is a steady population of several IMBHs. This population drives the merger rate between IMBHs and the SMBH at a rate of about one per 10Myr, sufficient to build the accumulate majority of mass of the SMBH. Mergers of IMBHs with SMBHs throughout the universe are detectable by LISA, at a rate of about two per week.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The ecology of star clusters and intermediate mass black holes in the Galactic bulge does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The ecology of star clusters and intermediate mass black holes in the Galactic bulge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The ecology of star clusters and intermediate mass black holes in the Galactic bulge will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-218359

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.