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Universal Self-Similarity of Cosmic Voids



 
 
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  #1  
Old July 8th 14, 09:16 AM posted to sci.astro.research
Robert L. Oldershaw
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Default 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  
Old July 9th 14, 06:40 AM posted to sci.astro.research
brad
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Default Universal Self-Similarity of Cosmic Voids

Doesn't it seem likely that all voids form by the same physical process?

Brad
  #3  
Old July 10th 14, 08:49 AM posted to sci.astro.research
Phillip Helbig---undress to reply
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Default 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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