Authors: DeBuhr et al (2012)
The paper (Stellar Disks in Aquarius Dark Matter Haloes) shows
results for stellar-bar formation in 4 Milky-Way-size dark matter haloes
of the Aquarius project. The find that (i) the presence of a stellar
component in the center of the haloes induces inner-halo contraction; (ii)
3/4 of the disks form a central bar; (iii) almost all of them experience a
buckling instability with a boost of the stellar vertical velocity
dispersion; (iv) when mass is reduced by at least a factor 2 no bar is
formed; (v) re-orientation of the central part of the disk and halo
determines warp formation.
There is not much new: just usual stellar dynamics analysis on the new
Similar results about warps and bars might be reproduced by different
phenomena (e.g. infalling satellite galaxies; dark-matter substructures;
cold gas clumps; etc.)
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