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Filament-Arm Node Systems (FANS): A new probe of the winding and chirality of the cosmic web — arXiv:2609.07792

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.07792
License (as archived): CC0-1.0
Archived: 2026-10-16T16:07:28.359Z
SHA-256 of the archived text: b159a1c58ad686d979d5387603dee7bcac28553d1880df2a4cb5ceac3a8d9c80
Stable URL of this page: https://metraipolis.com/documento/dc_64ee035c8bb3

How to cite

Filament-Arm Node Systems (FANS): A new probe of the winding and chirality of the cosmic web — arXiv:2609.07792 — arXiv (en), https://arxiv.org/abs/2609.07792 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_64ee035c8bb3 (Metraipolis archive dc_64ee035c8bb3, sha256 b159a1c58ad686d979d5387603dee7bcac28553d1880df2a4cb5ceac3a8d9c80)

BibTeX

@misc{dc64ee035c8bb3,
  title = {Filament-Arm Node Systems (FANS): A new probe of the winding and chirality of the cosmic web — arXiv:2609.07792},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.07792},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_64ee035c8bb3; sha256 b159a1c58ad686d979d5387603dee7bcac28553d1880df2a4cb5ceac3a8d9c80},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.07792. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We define Filament-Arm Node Systems (FANS), a new class of cosmic-web objects consisting of multiple filament arms connected to a common node, and use their geometry to construct an object-based test of cosmic chirality. With the cosmic-web node providing a natural reference point, FANS span characteristic scales of ~60Mpc/h, allowing the coherent winding of their arms around the node to be measured directly. We define cosmic spirality as the amplitude of this winding and handedness as its signed clockwise (CW) or counter-clockwise (CCW) sense. We further introduce an axis-conditioned extrinsic estimator that searches for the projected signature of a coherent three-dimensional axial pattern of the handedness field, corresponding to a preferred axis of winding. Applying these measurements to two distinct SDSS filament reconstructions, and assessing their significance with sign-flip nulls and 27 controlled variations of the FANS construction parameters, we find no significant preference for CW or CCW winding, either globally or around a preferred axis. The data are therefore consistent with parity symmetry, as expected in standard LCDM cosmology. We additionally find that cosmic spirality decreases with cosmic time, a trend that may reflect the gravitational straightening of filament arms. These first constraints establish FANS as a new probe of cosmic-web symmetry and large-scale morphology and provide a baseline for future parity tests with the much larger filament samples expected from upcoming surveys.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-09 in astro-ph.CO).
Categorie arXiv: Cosmology and Nongalactic Astrophysics (astro-ph.CO).
Pagina del lavoro: https://arxiv.org/abs/2609.07792 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T15:48:46.926Z dalla pagina https://arxiv.org/catchup/astro-ph.CO/2026-09-09?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).