Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-12-02
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
4 pages, 3 figures, comments welcome
Scientific paper
Based on a set of 50, large volume, cold dark matter N-Body simulations we compute the alignment correlation functions, i.e.,cross correlation functions between high density peaks and the overall matter distribution measured along the orientation of the peaks and perpendicular to it. We find that matter is distributed anisotropically out to scales of ~150 Mpc/h. At the Baryonic Acoustic Oscillations (BAO) scale, ~100 Mpc/h, the amplitudes of the alignment correlation function measured along the orientation of the high density peaks is enhanced by a factor of ~2 compared to the conventional correlation function. The opposite holds for the correlation measured perpendicular to it. The location of the BAO peak shifts towards smaller (larger) scales if measured along (perpendicular to) the orientation of the high density peaks. There appears no zero-crossing of the correlation functions measured along the orientation of the peaks out to 200 Mpc/h whereas the zero-crossing of the correlation functions measured perpendicular to it is found at distances lower than expected within the LCDM paradigm.
Faltenbacher Aandreas
Li Cheng
Wang Jie
No associations
LandOfFree
Anisotropy in the matter distribution beyond the BAO scale does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Anisotropy in the matter distribution beyond the BAO scale, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anisotropy in the matter distribution beyond the BAO scale will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-140870