• Home
  • Topology and Geometry of the Dark Matter Web: A Multi-Stream View

Topology and Geometry of the Dark Matter Web: A Multi-Stream View

Topological connections in the single-streaming voids and multistreaming filaments and walls reveal a cosmic web structure different from traditional mass density fields. A single void structure not only percolates the multistream field in all the directions, but also occupies over 99 per cent of all the single-streaming regions. Sub-grid analyses on scales smaller than simulation resolution reveal tiny pockets of voids that are isolated by membranes of the structure. For the multistreaming excursion sets, the percolating structure is significantly thinner than the filaments in overdensity excursion approach. Hessian eigenvalues of the multistream field are used as local geometrical indicators of dark matter structures. Single-streaming regions have most of the zero eigenvalues. Parameter-free conditions on the eigenvalues in the multistream region may be used to delineate primitive geometries with concavities corresponding to filaments, walls and haloes.

Monthly Notices of the Royal Astronomical Society 467, 1748, 2017

Authors: 
Ramachandra*, Nesar S.& Shandarin*, Sergei F. *KU Authors

Department Communications

Colloquia         Seminars         Public Events         AAL

MARAC2017

NEWSLETTERS

Department            Alumni

VIDEOS

Mr. Bob Show              Colloquia

Alumni Remembrances          Public Lectures

Departmental Calendar

Paper of the Week

Jamie Wilt*, Youpin Gong*, Ming Gong*, Feifan Su, Huikai Xu, Ridwan Sakidja, Alan Elliot*, Rongtao Lu*, Shiping Zhao, Siyuan Han*, and Judy Z. Wu* *KU Authors

See previous papers

Mr. Bob T-Shirts: Lab Support
Home to 50+ departments, centers, and programs, the School of the Arts, and the School of Public Affairs and Administration
KU offers courses in 40 languages
No. 1 ranking in city management and urban policy —U.S. News and World Report
One of 34 U.S. public institutions in the prestigious Association of American Universities
44 nationally ranked graduate programs.
—U.S. News & World Report
KU Today
From decoding jargon to building the right team, join @KUcontinuinged 's 'Big Data for Managers, Decision Makers':… https://t.co/IYdDxgIU3y


Social Media

Find us on Facebook