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2013MNRAS.435..928B - Mon. Not. R. Astron. Soc., 435, 928-933 (2013/October-3)
Triaxial cosmological haloes and the disc of satellites.
BOWDEN A., EVANS N.W. and BELOKUROV V.
Abstract (from CDS):
As an application, we carry out the simulations of thin discs of satellites in triaxial dark halo potentials. This is motivated by the recent claims of an extended, thin disc of satellites around the M31 galaxy with a vertical rms scatter of ∼ 12kpc and a radial extent of ∼ 300kpc. We show that a thin satellite disc can persist over cosmological times if and only if it lies in the planes perpendicular to the long or short axis of a triaxial halo, or in the equatorial or polar planes of a spheroidal halo. In any other orientation, then the disc thickness doubles on ∼ 5 Gyr time-scales and so must have been born with an implausibly small vertical scaleheight.
Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
Journal keyword(s): galaxies: dwarf - galaxies: individual: M31 - galaxies: kinematics and dynamics - Local Group
Simbad objects: 22
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