MG13 - Talk detail |
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Participant |
Neyrinck, Mark | |||||||
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Institution |
Johns Hopkins University - 3400 N. Charles St. - Baltimore - MD - USA | |||||||
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Session |
OC4 |
Accepted |
Yes |
Order |
8 |
Time |
17:30 - 17:50 | |
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Talk |
Oral abstract |
Title |
ORIGAMI: Delineating Cosmic Structures with Phase-Space Folding | |||||
| Co-authors | Bridget Falck, Alex Szalay | |||||||
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Abstract |
The ORIGAMI method identifies collapsed structures in cosmological N-body simulations, a crucial step in comparing theory to observed galaxies. Structure formation can be thought of as the folding of an initially flat three-dimensional manifold in six-dimensional phase space. ORIGAMI finds the outer folds that delineate these structures. Halo, filament, wall and void particles are identified as those that have undergone shell-crossing along 3, 2, 1, and 0 orthogonal axes, respectively. This gives an objective, dynamical and geometric definition of these regions, a vital check against standard density-based methods. |
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