Intrinsic alignments of galaxies around cosmic voids
| Autor: | William, d'Assignies D., Chisari, Nora Elisa, Hamaus, Nico, Singh, Sukhdeep, Sub String Theory Cosmology and ElemPart, Theoretical Physics |
|---|---|
| Přispěvatelé: | Laboratoire de physique de l'ENS - ENS Paris (LPENS), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Laboratoire de physique de l'ENS - ENS Paris (LPENS (UMR_8023)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Sub String Theory Cosmology and ElemPart, Theoretical Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
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 |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 509(2), 1985. Oxford University Press |
| ISSN: | 0035-8711 |
| Popis: | 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. Comment: 11 pages, 8 figures, matches accepted version |
| Databáze: | OpenAIRE |
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