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Not all lensing is low: An analysis of DESI$\times$DES using the Lagrangian Effective Theory of LSS

Fuente: arXiv

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Autores principales:	Chen, S., DeRose, J., Zhou, R., White, M., Ferraro, S., Blake, C., Lange, J. U., Wechsler, R. H., Aguilar, J., Ahlen, S., Brooks, D., Claybaugh, T., Dawson, K., de la Macorra, A., Doel, P., Font-Ribera, A., Gaztañaga, E., Gontcho, S. Gontcho A, Gutierrez, G., Honscheid, K., Howlett, C., Kehoe, R., Kirkby, D., Kisner, T., Kremin, A., Landriau, M., Guillou, L. Le, Manera, M., Meisner, A., Miquel, R., Newman, J. A., Niz, G., Palanque-Delabrouille, N., Percival, W. J., Prada, F., Rossi, G., Sanchez, E., Schlegel, D., Schubnell, M., Sprayberry, D., Tarlé, G., Weaver, B. A.
Formato:	Preprint
Publicado:	2024
Materias:	Cosmology and Nongalactic Astrophysics
Acceso en línea:	Acceder al recurso
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_version_	1866914974081744896
author	Chen, S. DeRose, J. Zhou, R. White, M. Ferraro, S. Blake, C. Lange, J. U. Wechsler, R. H. Aguilar, J. Ahlen, S. Brooks, D. Claybaugh, T. Dawson, K. de la Macorra, A. Doel, P. Font-Ribera, A. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Honscheid, K. Howlett, C. Kehoe, R. Kirkby, D. Kisner, T. Kremin, A. Landriau, M. Guillou, L. Le Manera, M. Meisner, A. Miquel, R. Newman, J. A. Niz, G. Palanque-Delabrouille, N. Percival, W. J. Prada, F. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Sprayberry, D. Tarlé, G. Weaver, B. A.
author_facet	Chen, S. DeRose, J. Zhou, R. White, M. Ferraro, S. Blake, C. Lange, J. U. Wechsler, R. H. Aguilar, J. Ahlen, S. Brooks, D. Claybaugh, T. Dawson, K. de la Macorra, A. Doel, P. Font-Ribera, A. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Honscheid, K. Howlett, C. Kehoe, R. Kirkby, D. Kisner, T. Kremin, A. Landriau, M. Guillou, L. Le Manera, M. Meisner, A. Miquel, R. Newman, J. A. Niz, G. Palanque-Delabrouille, N. Percival, W. J. Prada, F. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Sprayberry, D. Tarlé, G. Weaver, B. A.
contents	In this work we use Lagrangian perturbation theory to analyze the harmonic space galaxy clustering signal of Bright Galaxy Survey (BGS) and Luminous Red Galaxies (LRGs) targeted by the Dark Energy Spectroscopic Instrument (DESI), combined with the galaxy--galaxy lensing signal measured around these galaxies using Dark Energy Survey Year 3 source galaxies. The BGS and LRG galaxies are extremely well characterized by DESI spectroscopy and, as a result, lens galaxy redshift uncertainty and photometric systematics contribute negligibly to the error budget of our ``$2\times2$-point'' analysis. On the modeling side, this work represents the first application of the \texttt{spinosaurus} code, implementing an effective field theory model for galaxy intrinsic alignments, and we additionally introduce a new scheme (\texttt{MAIAR}) for marginalizing over the large uncertainties in the redshift evolution of the intrinsic alignment signal. Furthermore, this is the first application of a hybrid effective field theory (HEFT) model for galaxy bias based on the $\texttt{Aemulus}\, ν$ simulations. Our main result is a measurement of the amplitude of the lensing signal, $S_8=σ_8 \left(Ω_m/0.3\right)^{0.5} = 0.850^{+0.042}_{-0.050}$, consistent with values of this parameter derived from the primary CMB. This constraint is artificially improved by a factor of $51\%$ if we assume a more standard, but restrictive parameterization for the redshift evolution and sample dependence of the intrinsic alignment signal, and $63\%$ if we additionally assume the nonlinear alignment model. We show that when fixing the cosmological model to the best-fit values from Planck PR4 there is $> 5 σ$ evidence for a deviation of the evolution of the intrinsic alignment signal from the functional form that is usually assumed in cosmic shear and galaxy--galaxy lensing studies.
format	Preprint
id	arxiv_https___arxiv_org_abs_2407_04795
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Not all lensing is low: An analysis of DESI$\times$DES using the Lagrangian Effective Theory of LSS Chen, S. DeRose, J. Zhou, R. White, M. Ferraro, S. Blake, C. Lange, J. U. Wechsler, R. H. Aguilar, J. Ahlen, S. Brooks, D. Claybaugh, T. Dawson, K. de la Macorra, A. Doel, P. Font-Ribera, A. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Honscheid, K. Howlett, C. Kehoe, R. Kirkby, D. Kisner, T. Kremin, A. Landriau, M. Guillou, L. Le Manera, M. Meisner, A. Miquel, R. Newman, J. A. Niz, G. Palanque-Delabrouille, N. Percival, W. J. Prada, F. Rossi, G. Sanchez, E. Schlegel, D. Schubnell, M. Sprayberry, D. Tarlé, G. Weaver, B. A. Cosmology and Nongalactic Astrophysics In this work we use Lagrangian perturbation theory to analyze the harmonic space galaxy clustering signal of Bright Galaxy Survey (BGS) and Luminous Red Galaxies (LRGs) targeted by the Dark Energy Spectroscopic Instrument (DESI), combined with the galaxy--galaxy lensing signal measured around these galaxies using Dark Energy Survey Year 3 source galaxies. The BGS and LRG galaxies are extremely well characterized by DESI spectroscopy and, as a result, lens galaxy redshift uncertainty and photometric systematics contribute negligibly to the error budget of our ``$2\times2$-point'' analysis. On the modeling side, this work represents the first application of the \texttt{spinosaurus} code, implementing an effective field theory model for galaxy intrinsic alignments, and we additionally introduce a new scheme (\texttt{MAIAR}) for marginalizing over the large uncertainties in the redshift evolution of the intrinsic alignment signal. Furthermore, this is the first application of a hybrid effective field theory (HEFT) model for galaxy bias based on the $\texttt{Aemulus}\, ν$ simulations. Our main result is a measurement of the amplitude of the lensing signal, $S_8=σ_8 \left(Ω_m/0.3\right)^{0.5} = 0.850^{+0.042}_{-0.050}$, consistent with values of this parameter derived from the primary CMB. This constraint is artificially improved by a factor of $51\%$ if we assume a more standard, but restrictive parameterization for the redshift evolution and sample dependence of the intrinsic alignment signal, and $63\%$ if we additionally assume the nonlinear alignment model. We show that when fixing the cosmological model to the best-fit values from Planck PR4 there is $> 5 σ$ evidence for a deviation of the evolution of the intrinsic alignment signal from the functional form that is usually assumed in cosmic shear and galaxy--galaxy lensing studies.
title	Not all lensing is low: An analysis of DESI$\times$DES using the Lagrangian Effective Theory of LSS
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2407.04795