A Capture Scenario for the Globular Cluster Centauri | Zendy

Toshio Tsuchiya | Zendy; Dana I. Dinescu | Zendy; V. I. Korchagin | Zendy

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A Capture Scenario for the Globular Cluster Centauri

Author(s) -

Toshio Tsuchiya,

Dana I. Dinescu,

V. I. Korchagin

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/375805

Subject(s) - globular cluster , physics , milky way , astrophysics , astronomy , dwarf galaxy , satellite galaxy , orbit (dynamics) , star cluster , satellite , radius , galaxy , orbital elements , orbital decay , computer security , computer science , engineering , aerospace engineering

We explore an accretion origin for Omega Cen by N-body modeling of theorbital decay and disruption of a Milky-Way dwarf satellite. This work isfocused on studying a particular satellite model that aims to reproduce thepresent orbit of Omega Cen, as recently determined from absolute propermotions. The model satellite is launched from 58 kpc from the Galactic Center,on a radial, low-inclination orbit. We find that a capture scenario can producean Omega Cen-like object with the current low-energy orbit of the cluster. Ourbest model is a nucleated galaxy with a Hernquist density profile that has amass of 8 10**8 Msun, and a half-mass radius of 1.4 kpc.Comment: 15 pages, 5 figures, accepted by ApJ

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