On Raising A Globular Cluster Formed In The Galactic Disk Into The Halo

Details On Raising A Globular Cluster Formed In The Galactic Disk Into The Halo On Raising A Globular Cluster Formed In The Galactic Disk Into The Halo

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dda....37.0602i&link_type=abstract

American Astronomical Society, DDA meeting #37, #6.02; Bulletin of the American Astronomical Society, Vol. 38, p.669

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Classically, most globular clusters (GC's) are thought to have formed in situ in a galaxy's halo. An alternative possibility is examined in an approximate, empirical way. An axisymmetric galactic model is constructed with simple, multiple resonances in the solar vicinity (galactic year, epicyclic period, vertical period). A resonant internal bar or distortion stirs the resonances so as to break the action of the third (quasi) integral that otherwise restricts the orbit to a low-inclination box. Initial computations indicate that the orbits of GC's and stars formed in the disk with low angular momentum become chaotic and gradually rise into the halo where they subsequently spend most of their time. An n-body simulation will be required to establish this result in a self-consistent way. Other implications are mentioned. This research was supported NSERC.

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