Felix: A Topology Based Framework for Visual Exploration of Cosmic Filaments
Felix: A Topology Based Framework for Visual Exploration of Cosmic Filaments
复制标题
Felix：基于拓扑的宇宙细丝视觉探索框架
DOI：
--
复制
发表时间：
2015
影响因子：
5.2
通讯作者：
S. Rieder
中科院分区：
文献类型：
--
作者：
N. Shivashankar;Pratyush Pranav;V. Natarajan;R. Weygaert;E. G. P. Bos;S. Rieder
宇宙的大尺度结构是由维里化的团簇、线状细丝、片状壁和巨大的近乎空的三维空洞组成的。描述大尺度宇宙对于我们理解星系的形成和演化至关重要。当与跨越相对较大范围的长丝相比时，簇、壁和空隙的密度范围相对良好地分离。因此，大规模的宇宙网络构成了宇宙网络的一个复杂部分。在本文中，我们描述了菲利克斯，一个基于拓扑结构的框架，用于宇宙网络中细丝的视觉探索。该结构由密度场的Morse-Smale复形中的2-鞍的上升流形几何表示。我们生成一个层次结构的Morse-Smale复合体和查询的基础上的密度范围内的细丝的端点。整个层次Morse-Smale复杂的查询被有效地处理，允许交互式可视化。我们应用Felix的启发式Voronoi运动学模型和标准ACDM宇宙学的基础上的计算机模拟，并通过两个案例研究证明其实用性。首先，我们在Voronoi运动学模拟数据集中提取星系团内和星系团间的宇宙细丝。我们证明，我们产生类似的结果，现有的结构发现者。其次，我们从ACDM模拟数据集中提取不同类别的细丝的密度特征。构成宇宙网脊柱的细丝，在当前时代存在于高密度区域，使用Felix分离。此外，存在于空隙状区域中的细丝被分离和可视化。这些纤维结构通常被较高密度范围的长丝遮蔽，并且不容易使用其他长丝提取方法表征和提取。
The large-scale structure of the universe is comprised of virialized blob-like clusters, linear filaments, sheet-like walls and huge near empty three-dimensional voids. Characterizing the large scale universe is essential to our understanding of the formation and evolution of galaxies. The density range of clusters, walls and voids are relatively well separated, when compared to filaments, which span a relatively larger range. The large scale filamentary network thus forms an intricate part of the cosmic web. In this paper, we describe Felix, a topology based framework for visual exploration of filaments in the cosmic web. The filamentary structure is represented by the ascending manifold geometry of the 2-saddles in the Morse-Smale complex of the density field. We generate a hierarchy of Morse-Smale complexes and query for filaments based on the density ranges at the end points of the filaments. The query is processed efficiently over the entire hierarchical Morse-Smale complex, allowing for interactive visualization. We apply Felix to computer simulations based on the heuristic Voronoi kinematic model and the standard ACDM cosmology, and demonstrate its usefulness through two case studies. First, we extract cosmic filaments within and across cluster like regions in Voronoi kinematic simulation datasets. We demonstrate that we produce similar results to existing structure finders. Second, we extract different classes of filaments based on their density characteristics from the ACDM simulation datasets. Filaments that form the spine of the cosmic web, which exist in high density regions in the current epoch, are isolated using Felix. Also, filaments present in void-like regions are isolated and visualized. These filamentary structures are often over shadowed by higher density range filaments and are not easily characterizable and extractable using other filament extraction methodologies.
DOI：
10.1111/j.1745-3933.2012.01222.x
发表时间：
2012-01
影响因子：
--
作者：
N. Libeskind;Y. Hoffman;A. Knebe;M. Steinmetz;S. Gottlober;Ofer Metuki;G. Yepes
通讯作者：
N. Libeskind;Y. Hoffman;A. Knebe;M. Steinmetz;S. Gottlober;Ofer Metuki;G. Yepes
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.
DOI：
10.1111/j.1365-2966.2012.21636.x
发表时间：
2012-01
影响因子：
4.8
作者：
S. Codis;C. Pichon;J. Devriendt;A. Slyz;D. Pogosyan;Y. Dubois;T. Sousbie
通讯作者：
S. Codis;C. Pichon;J. Devriendt;A. Slyz;D. Pogosyan;Y. Dubois;T. Sousbie