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Intrinsic alignments of galaxies around cosmic voids
- Source :
- Monthly Notices of the Royal Astronomical Society, 509(2), 1985. Oxford University Press
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- The intrinsic alignments of galaxies, i.e., the correlation between galaxy shapes and their environment, are a major source of contamination for weak gravitational lensing surveys. Most studies of intrinsic alignments have so far focused on measuring and modelling the correlations of luminous red galaxies with galaxy positions or the filaments of the cosmic web. In this work, we investigate alignments around cosmic voids. We measure the intrinsic alignments of luminous red galaxies detected by the Sloan Digital Sky Survey around a sample of voids constructed from those same tracers and with radii in the ranges: $[20-30; 30-40; 40-50]$ $h^{-1}$ Mpc and in the redshift range $z=0.4-0.8$. We present fits to the measurements based on a linear model at large scales, and on a new model based on the void density profile inside the void and in its neighbourhood. We constrain the free scaling amplitude of our model at small scales, finding no significant alignment at $1\sigma$ for either sample. We observe a deviation from the null hypothesis, at large scales, of 2$\sigma$ for voids with radii between 20 and 30 $h^{-1}$ Mpc, and 1.5 $\sigma$ for voids with radii between 30 and 40 $h^{-1}$ Mpc and constrain the amplitude of the model on these scales. We find no significant deviation at 1$\sigma$ for larger voids. Our work is a first attempt at detecting intrinsic alignments of galaxy shapes around voids and provides a useful framework for their mitigation in future void lensing studies.<br />Comment: 11 pages, 8 figures, matches accepted version
- Subjects :
- Void (astronomy)
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
media_common.quotation_subject
data analysis
gravitational lensing
weak
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
methods
0103 physical sciences
galaxies
010303 astronomy & astrophysics
Scaling
Weak gravitational lensing
Astrophysics::Galaxy Astrophysics
media_common
Physics
COSMIC cancer database
010308 nuclear & particles physics
(cosmology) large-scale structure of Universe
Astronomy and Astrophysics
Galaxy
Redshift
Amplitude
13. Climate action
Sky
statistics
Space and Planetary Science
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society, 509(2), 1985. Oxford University Press
- Accession number :
- edsair.doi.dedup.....c2fd34a2e12f896dbcb2798cb9bd3d31