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#1
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Universal Self-Similarity of Cosmic Voids
Some interesting reading; http://arxiv.org/abs/1407.1295 .
Title: Self-similarity and universality of void density profiles in simulation and SDSS data AUs; S. Nadathur, S. Hotchkiss, J. M. Diego, I. T. Iliev, S. Gottloeber, W. A. Watson, G. Yepes From abstract: "Using this method we show that voids in simulation are exactly self-similar, meaning that their average rescaled profile does not depend on the void size. Within the range of our simulation we also find no redshift dependence of the profile. Comparison of the profiles obtained from simulated and real voids shows an excellent match. The profiles of real voids also show a universal behaviour over a wide range of galaxy luminosities, number densities and redshifts. This points to a fundamental property of the voids found by the watershed algorithm, which can be exploited in future studies of voids." Nature may abhor a vacuum, but nature adores self-similarity. [Mod. note: reformatted, non-ASCII character replaced -- mjh] |
#2
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Universal Self-Similarity of Cosmic Voids
Doesn't it seem likely that all voids form by the same physical process?
Brad |
#3
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Universal Self-Similarity of Cosmic Voids
In article , brad
writes: Doesn't it seem likely that all voids form by the same physical process? Yes. The point of "self-similarity" in this context is that they are similar over a wide range of scales. |
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