Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles
Filaments of the cosmic web drive spin acquisition of disc galaxies. The point process of filament-type saddle represent best this environment and can be used to revisit the Tidal Torque Theory in the context of an anisotropic peak (saddle) background split. The constrained misalignment between the...
| Váldodahkkit: | , , , , , |
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| Materiálatiipa: | Journal article |
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Cambridge University Press
2016
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| _version_ | 1826292318397792256 |
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| author | Pichon, C Codis, S Pogosyan, D Dubois, Y Desjacques, V Devriendt, J |
| author_facet | Pichon, C Codis, S Pogosyan, D Dubois, Y Desjacques, V Devriendt, J |
| author_sort | Pichon, C |
| collection | OXFORD |
| description | Filaments of the cosmic web drive spin acquisition of disc galaxies. The point process of filament-type saddle represent best this environment and can be used to revisit the Tidal Torque Theory in the context of an anisotropic peak (saddle) background split. The constrained misalignment between the tidal tensor and the Hessian of the density field generated in the vicinity of filament saddle points simply explains the corresponding transverse and longitudinal point-reflection symmetric geometry of spin distribution. It predicts in particular an <i>azimuthal</i> orientation of the spins of more massive galaxies and spin <i>alignment</i> with the filament for less massive galaxies. Its scale dependence also allows us to relate the transition mass corresponding to the alignment of dark matter halos spin relative to the direction of their neighboring filament to this geometry, and to predict accordingly it s scaling with the mass of non linearity, as was measured in simulations. |
| first_indexed | 2024-03-07T03:12:50Z |
| format | Journal article |
| id | oxford-uuid:b4c9c9dd-a24e-45fe-8618-2003a429f8a5 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:12:50Z |
| publishDate | 2016 |
| publisher | Cambridge University Press |
| record_format | dspace |
| spelling | oxford-uuid:b4c9c9dd-a24e-45fe-8618-2003a429f8a52022-03-27T04:28:39Z Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b4c9c9dd-a24e-45fe-8618-2003a429f8a5Symplectic Elements at OxfordCambridge University Press2016Pichon, CCodis, SPogosyan, DDubois, YDesjacques, VDevriendt, J Filaments of the cosmic web drive spin acquisition of disc galaxies. The point process of filament-type saddle represent best this environment and can be used to revisit the Tidal Torque Theory in the context of an anisotropic peak (saddle) background split. The constrained misalignment between the tidal tensor and the Hessian of the density field generated in the vicinity of filament saddle points simply explains the corresponding transverse and longitudinal point-reflection symmetric geometry of spin distribution. It predicts in particular an <i>azimuthal</i> orientation of the spins of more massive galaxies and spin <i>alignment</i> with the filament for less massive galaxies. Its scale dependence also allows us to relate the transition mass corresponding to the alignment of dark matter halos spin relative to the direction of their neighboring filament to this geometry, and to predict accordingly it s scaling with the mass of non linearity, as was measured in simulations. |
| spellingShingle | Pichon, C Codis, S Pogosyan, D Dubois, Y Desjacques, V Devriendt, J Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles |
| title |
Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles
|
| title_full |
Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles
|
| title_fullStr |
Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles
|
| title_full_unstemmed |
Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles
|
| title_short |
Why do galactic spins flip in the cosmic web? A Theory of Tidal Torques near saddles
|
| title_sort | why do galactic spins flip in the cosmic web a theory of tidal torques near saddles |
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