학술논문
Redshift-dependent RSD bias from Intrinsic Alignment with DESI Year 1 Spectra
Document Type
Working Paper
Author
Lamman, Claire; Eisenstein, Daniel; Aguilar, Jessica Nicole; Ahlen, Steven; Brooks, David; Claybaugh, Todd; de la Macorra, Axel; Dey, Arjun; Dey, Biprateep; Doel, Peter; Ferraro, Simone; Font-Ribera, Andreu; Forero-Romero, Jaime E.; Gontcho, Satya Gontcho A; Guy, Julien; Kehoe, Robert; Kremin, Anthony; Guillou, Laurent Le; Levi, Michael; Manera, Marc; Miquel, Ramon; Newman, Jeffrey A.; Nie, Jundan; Palanque-Delabrouille, Nathalie; Prada, Francisco; Rezaie, Mehdi; Rossi, Graziano; Sanchez, Eusebio; Schubnell, Michael; Hee-Jong, Seo; Tarlé, Gregory; Weaver, Benjamin Alan; Zhou, Zhimin
Source
Subject
Language
Abstract
We estimate the redshift-dependent, anisotropic clustering signal in DESI's Year 1 Survey created by tidal alignments of Luminous Red Galaxies (LRGs) and a selection-induced galaxy orientation bias. To this end, we measured the correlation between LRG shapes and the tidal field with DESI's Year 1 redshifts, as traced by LRGs and Emission-Line Galaxies (ELGs). We also estimate the galaxy orientation bias of LRGs caused by DESI's aperture-based selection, and find it to increase by a factor of seven between redshifts 0.4 - 1.1 due to redder, fainter galaxies falling closer to DESI's imaging selection cuts. These effects combine to dampen measurements of the quadrupole of the correlation function caused by structure growth on scales of 10 - 80 Mpc/h by about 0.15% for low redshifts (0.4