The Dark Energy Survey Year 3 and Eboss: Constraining Galaxy Intrinsic Alignments Across Luminosity and Colour Space

S. Samuroff,R. Mandelbaum,J. Blazek,A. Campos,N. MacCrann,G. Zacharegkas,A. Amon,J. Prat,S. Singh,J. Elvin-Poole,A. J. Ross,A. Alarcon,E. Baxter,K. Bechtol,M. R. Becker,G. M. Bernstein,A. Carnero Rosell,M. Carrasco Kind, R. Cawthon,C. Chang,R. Chen,A. Choi,M. Crocce,C. Davis,J. DeRose,S. Dodelson,C. Doux,A. Drlica-Wagner,K. Eckert,S. Everett,A. Ferte,M. Gatti,G. Giannini,D. Gruen,R. A. Gruendl,I Harrison,K. Herner,E. M. Huff,M. Jarvis,N. Kuropatkin,P-F Leget,P. Lemos,J. McCullough,J. Myles,A. Navarro-Alsina,S. Pandey,A. Porredon,M. Raveri, M. Rodriguez-Monroy,R. P. Rollins, A. Roodman,G. Rossi,E. S. Rykoff, C. Sanchez,L. F. Secco,I Sevilla-Noarbe,E. Sheldon,T. Shin,M. A. Troxel,I Tutusaus,N. Weaverdyck,B. Yanny,B. Yin,Y. Zhang, J. Zuntz, M. Aguena,O. Alves,J. Annis,D. Bacon,E. Bertin,S. Bocquet, D. Brooks,D. L. Burke,J. Carretero,M. Costanzi,L. N. da Costa,M. E. S. Pereira,J. De Vicente,S. Desai, H. T. Diehl,J. P. Dietrich, P. Doel,I Ferrero,B. Flaugher,J. Frieman,J. Garcia-Bellido,S. R. Hinton,D. L. Hollowood,K. Honscheid,D. J. James,K. Kuehn,O. Lahav, J. L. Marshall,P. Melchior,J. Mena-Fernandez,F. Menanteau,R. Miquel,J. Newman,A. Palmese,A. Pieres,A. A. Plazas Malagon, E. Sanchez,V Scarpine, M. Smith,E. Suchyta,M. E. C. Swanson,G. Tarle,C. To

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY（2023）

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Abstract

We present direct constraints on galaxy intrinsic alignments using the Dark Energy Survey Year 3 (DES Y3), the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) and its precursor, the Baryon Oscillation Spectroscopic Survey (BOSS). Our measurements incorporate photometric red sequence (redMaGiC) galaxies from DES with median redshift z∼0.2-1.0, luminous red galaxies (LRGs) from eBOSS at z∼0.8, and also a SDSS-III BOSS CMASS sample at z∼0.5. We measure two point intrinsic alignment correlations, which we fit using a model that includes lensing, magnification and photometric redshift error. Fitting on scales 6More

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Astronomical Instrumentation

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