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arXiv:0706.2627 (astro-ph)
[Submitted on 18 Jun 2007]

Title:The Tidal Tails of NGC 5466

Authors:M. Fellhauer (1), N.W. Evans (1), V. Belokurov (1), M.I. Wilkinson (1,2), G. Gilmore (1) ((1) Cambridge, (2) Leicester)
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Abstract: The study of substructure in the stellar halo of the Milky Way has made a lot of progress in recent years, especially with the advent of surveys like the Sloan Digital Sky Survey. Here, we study the newly discovered tidal tails of the Galactic globular cluster NGC 5466. By means of numerical simulations, we reproduce the shape, direction and surface density of the tidal tails, as well as the structural and kinematical properties of the present-day NGC 5466. Although its tails are very extended in SDSS data (> 45 degrees), NGC 5466 is only losing mass slowly at the present epoch and so can survive for probably a further Hubble time. The effects of tides at perigalacticon and disc crossing are the dominant causes of the slow dissolution of NGC 5466, accounting for about 60 % of the mass loss over the course of its evolution. The morphology of the tails provides a constraint on the proper motion -- the observationally determined proper motion has to be refined (within the stated error margins) to match the location of the tidal tails.
Comments: MNRAS, in press
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0706.2627 [astro-ph]
  (or arXiv:0706.2627v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0706.2627
Related DOI: https://doi.org/10.1111/j.1365-2966.2007.12111.x

Submission history

From: N. W. Evans [view email]
[v1] Mon, 18 Jun 2007 15:54:50 UTC (378 KB)
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