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    Topology and geometry of the dark matter web: a multistream view

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    Issue Date
    2017-01-22
    Author
    Ramachandra, Nesar S.
    Shandarin, Sergei F.
    Publisher
    Oxford University Press
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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    Abstract
    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.
    URI
    http://hdl.handle.net/1808/27309
    DOI
    https://doi.org/10.1093/mnras/stx183
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    • Physics and Astronomy Scholarly Works [1637]
    Citation
    Nesar S. Ramachandra, Sergei F. Shandarin; Topology and geometry of the dark matter web: a multistream view, Monthly Notices of the Royal Astronomical Society, Volume 467, Issue 2, 21 May 2017, Pages 1748–1762, https://doi.org/10.1093/mnras/stx183

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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