作者
Sungryong Hong, Bruno C Coutinho, Arjun Dey, Albert-L Barabási, Mark Vogelsberger, Lars Hernquist, Karl Gebhardt
发表日期
2016/7/1
期刊
Monthly Notices of the Royal Astronomical Society
卷号
459
期号
3
页码范围
2690-2700
出版商
Oxford University Press
简介
The large-scale distribution of galaxies is generally analysed using the two-point correlation function. However, this statistic does not capture the topology of the distribution, and it is necessary to resort to higher order correlations to break degeneracies. We demonstrate that an alternate approach using network analysis can discriminate between topologically different distributions that have similar two-point correlations. We investigate two galaxy point distributions, one produced by a cosmological simulation and the other by a Lévy walk. For the cosmological simulation, we adopt the redshift z = 0.58 slice from Illustris and select galaxies with stellar masses greater than 108 M. The two-point correlation function of these simulated galaxies follows a single power law, ξ(r) ∼ r−1.5. Then, we generate Lévy walks matching the correlation function and abundance with the simulated galaxies. We find that, while the …
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S Hong, BC Coutinho, A Dey, AL Barabási… - Monthly Notices of the Royal Astronomical Society, 2016