Computer Science
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9519m&link_type=abstract
HST Proposal ID #9519
Computer Science
Hst Proposal Id #9519 Galaxies
Scientific paper
Nuclei of roughly 130 galaxies have been or will be observed with STIS within the next few years with the goal of detecting supermassive black holes. About 1/2 of these data sets will consist of stellar absorption-line spectra. The research proposed here is directed toward understanding what such data can tell us about the formation histories of galactic nuclei and nuclear black holes. The structure and kinematics of galactic nuclei are fossil relics of the merger histories of galaxies and of the interaction between supermassive black holes and stars. For instance, black holes form bound pairs during galaxy mergers, which then eject stars via the gravitational slingshot, radically altering the structure of nuclei. Preliminary work indicates that many of the systematic properties of nuclei are explainable by interactions between single or binary black holes and stars. However simulations with existing N-body codes are severely limited in terms of the number of particles they can treat in a reasonable time. The main budget item would be a GRAPE-6 special-purpose computer which would be used in combination with novel N-body algorithms to permit a systematic study of black-hole nuclei using galaxy models containing up to 10^6 stars.
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