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research article

Detecting galaxy-filament alignments in the Sloan Digital Sky Survey III

Chen, Yen-Chi
•
Ho, Shirley
•
Blazek, Jonathan  
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May 1, 2019
Monthly Notices Of The Royal Astronomical Society

Previous studies have shown the filamentary structures in the cosmic web influence the alignments of nearby galaxies. We study this effect in the LOWZ sample of the Sloan Digital Sky Survey using the 'Cosmic Web Reconstruction' filament catalogue. We find that LOWZ galaxies exhibit a small but statistically significant alignment in the direction parallel to the orientation of nearby filaments. This effect is detectable even in the absence of nearby galaxy clusters, which suggests it is an effect from the matter distribution in the filament. A non-parametric regression model suggests that the alignment effect with filaments extends over separations of 30-40 Mpc. We find that galaxies that are bright and early-forming align more strongly with the directions of nearby filaments than those that are faint and late-forming; however, trends with stellar mass are less statistically significant, within the narrow range of stellar mass of this sample.

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Type
research article
DOI
10.1093/mnras/stz539
Web of Science ID

WOS:000474886200073

Author(s)
Chen, Yen-Chi
Ho, Shirley
Blazek, Jonathan  
He, Siyu
Mandelbaum, Rachel
Melchior, Peter
Singh, Sukhdeep
Date Issued

2019-05-01

Publisher

OXFORD UNIV PRESS

Published in
Monthly Notices Of The Royal Astronomical Society
Volume

485

Issue

2

Start page

2492

End page

2504

Subjects

Astronomy & Astrophysics

•

large-scale structure of universe

•

cosmic web reconstruction

•

dark-matter haloes

•

intrinsic alignments

•

spin alignment

•

calibration

•

evolution

•

clusters

•

sheets

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASTRO  
Available on Infoscience
July 27, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/159412
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