Abstract
We present the first quantitative detection of large-scale filamentary
structure at z ≃ 0.7 in the large cosmological volume probed by the
VIMOS Public Extragalactic Redshift Survey (VIPERS). We use simulations
to show the capability of VIPERS to recover robust topological features
in the galaxy distribution, in particular the filamentary network. We
then investigate how galaxies with different stellar masses and stellar
activities are distributed around the filaments, and find a significant
segregation, with the most massive or quiescent galaxies being closer to
the filament axis than less massive or active galaxies. The signal
persists even after downweighting the contribution of peak regions. Our
results suggest that massive and quiescent galaxies assemble their
stellar mass through successive mergers during their migration along
filaments towards the nodes of the cosmic web. On the other hand,
low-mass star-forming galaxies prefer the outer edge of filaments, a
vorticity-rich region dominated by smooth accretion, as predicted by the
recent spin alignment theory. This emphasizes the role of large-scale
cosmic flows in shaping galaxy properties.
Originalsprog | Engelsk |
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Tidsskrift | Monthly Notices of the Royal Astronomical Society |
Vol/bind | 465 |
Udgave nummer | 4 |
Sider (fra-til) | 3817-3822 |
ISSN | 0035-8711 |
DOI | |
Status | Udgivet - 1 mar. 2017 |
Udgivet eksternt | Ja |