Observational detection of correlation between galaxy spins and initial conditions
Galaxy spins can be predicted from the initial conditions in the early Universe through the tidal tensor twist. In simulations, their directions are well preserved through cosmic time, consistent with expectations of angular momentum conservation. We report a $\sim 3 σ$ detection of correlation betw...
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ftdatacite:10.48550/arxiv.2003.04800 2023-05-15T18:12:05+02:00 Observational detection of correlation between galaxy spins and initial conditions Motloch, Pavel Yu, Hao-Ran Pen, Ue-Li Xie, Yuanbo 2020 https://dx.doi.org/10.48550/arxiv.2003.04800 https://arxiv.org/abs/2003.04800 unknown arXiv https://dx.doi.org/10.1038/s41550-020-01262-3 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Cosmology and Nongalactic Astrophysics astro-ph.CO Astrophysics of Galaxies astro-ph.GA FOS Physical sciences article-journal Article ScholarlyArticle Text 2020 ftdatacite https://doi.org/10.48550/arxiv.2003.04800 https://doi.org/10.1038/s41550-020-01262-3 2022-03-10T15:52:33Z Galaxy spins can be predicted from the initial conditions in the early Universe through the tidal tensor twist. In simulations, their directions are well preserved through cosmic time, consistent with expectations of angular momentum conservation. We report a $\sim 3 σ$ detection of correlation between observed oriented directions of galaxy angular momenta and their predictions based on the initial density field reconstructed from the positions of SDSS galaxies. The detection is driven by a group of spiral galaxies classified by the Galaxy Zoo as (anti-)clockwise, with a modest improvement from adding galaxies from MaNGA and SAMI surveys. This is the first such detection of the oriented galaxy spin direction, which opens a way to use measurements of galaxy spins to probe fundamental physics in the early Universe. : 6 pages, 6 figures Article in Journal/Newspaper sami DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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language |
unknown |
topic |
Cosmology and Nongalactic Astrophysics astro-ph.CO Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
spellingShingle |
Cosmology and Nongalactic Astrophysics astro-ph.CO Astrophysics of Galaxies astro-ph.GA FOS Physical sciences Motloch, Pavel Yu, Hao-Ran Pen, Ue-Li Xie, Yuanbo Observational detection of correlation between galaxy spins and initial conditions |
topic_facet |
Cosmology and Nongalactic Astrophysics astro-ph.CO Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
description |
Galaxy spins can be predicted from the initial conditions in the early Universe through the tidal tensor twist. In simulations, their directions are well preserved through cosmic time, consistent with expectations of angular momentum conservation. We report a $\sim 3 σ$ detection of correlation between observed oriented directions of galaxy angular momenta and their predictions based on the initial density field reconstructed from the positions of SDSS galaxies. The detection is driven by a group of spiral galaxies classified by the Galaxy Zoo as (anti-)clockwise, with a modest improvement from adding galaxies from MaNGA and SAMI surveys. This is the first such detection of the oriented galaxy spin direction, which opens a way to use measurements of galaxy spins to probe fundamental physics in the early Universe. : 6 pages, 6 figures |
format |
Article in Journal/Newspaper |
author |
Motloch, Pavel Yu, Hao-Ran Pen, Ue-Li Xie, Yuanbo |
author_facet |
Motloch, Pavel Yu, Hao-Ran Pen, Ue-Li Xie, Yuanbo |
author_sort |
Motloch, Pavel |
title |
Observational detection of correlation between galaxy spins and initial conditions |
title_short |
Observational detection of correlation between galaxy spins and initial conditions |
title_full |
Observational detection of correlation between galaxy spins and initial conditions |
title_fullStr |
Observational detection of correlation between galaxy spins and initial conditions |
title_full_unstemmed |
Observational detection of correlation between galaxy spins and initial conditions |
title_sort |
observational detection of correlation between galaxy spins and initial conditions |
publisher |
arXiv |
publishDate |
2020 |
url |
https://dx.doi.org/10.48550/arxiv.2003.04800 https://arxiv.org/abs/2003.04800 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1038/s41550-020-01262-3 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2003.04800 https://doi.org/10.1038/s41550-020-01262-3 |
_version_ |
1766184651696635904 |