HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis

J. Mena-Fernández; C. Garcia-Quintero; S. Yuan; B. Hadzhiyska; O. Alves; M. Rashkovetskyi; H. Seo; N. Padmanabhan; S. Nadathur; C. Howlett; S. Alam; A. Rocher; A. J. Ross; E. Sanchez; M. Ishak; J. Aguilar; S. Ahlen; U. Andrade; S. BenZvi; D. Brooks; E. Burtin; S. Chen; X. Chen; T. Claybaugh; S. Cole; A. de la Macorra; A. de Mattia; Arjun Dey; B. Dey; Z. Ding; P. Doel; K. Fanning; J. E. Forero-Romero; E. Gaztañaga; H. Gil-Marín; S. Gontcho A Gontcho; G. Gutierrez; J. Guy; C. Hahn; K. Honscheid; S. Juneau; A. Kremin; M. Landriau; L. Le Guillou; M. E. Levi; M. Manera; P. Martini; L. Medina-Varela; A. Meisner; R. Miquel; J. Moustakas; E. Mueller; A. Muñoz-Gutiérrez; A. D. Myers; J. Nie; G. Niz; E. Paillas; N. Palanque-Delabrouille; W. J. Percival; C. Poppett; A. Pérez-Fernández; A. Rosado-Marin; G. Rossi; R. Ruggeri; C. Saulder; D. Schlegel; M. Schubnell; D. Sprayberry; G. Tarlé; M. Vargas-Magaña; B. A. Weaver; H. Zhang; H. Zou

doi:10.1088/1475-7516/2025/01/133

HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis

J. Mena-Fernández, C. Garcia-Quintero, S. Yuan, B. Hadzhiyska, O. Alves, M. Rashkovetskyi, H. Seo, N. Padmanabhan, S. Nadathur, C. Howlett, S. Alam, A. Rocher, A. J. Ross, E. Sanchez, M. Ishak, J. Aguilar, S. Ahlen, U. Andrade, S. BenZvi, D. BrooksE. Burtin, S. Chen, X. Chen, T. Claybaugh, S. Cole, A. de la Macorra, A. de Mattia, Arjun Dey, B. Dey, Z. Ding, P. Doel, K. Fanning, J. E. Forero-Romero, E. Gaztañaga, H. Gil-Marín, S. Gontcho A Gontcho, G. Gutierrez, J. Guy, C. Hahn, K. Honscheid, S. Juneau, A. Kremin, M. Landriau, L. Le Guillou, M. E. Levi, M. Manera, P. Martini, L. Medina-Varela, A. Meisner, R. Miquel, J. Moustakas, E. Mueller, A. Muñoz-Gutiérrez, A. D. Myers, J. Nie, G. Niz, E. Paillas, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, A. Pérez-Fernández, A. Rosado-Marin, G. Rossi, R. Ruggeri, C. Saulder, D. Schlegel, M. Schubnell, D. Sprayberry, G. Tarlé, M. Vargas-Magaña, B. A. Weaver, H. Zhang, H. Zou

Institute of Cosmology & Gravitation

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper, we present the estimation of systematics related to the halo occupation distribution (HOD) modeling in the baryon acoustic oscillations (BAO) distance measurement of the Dark Energy Spectroscopic Instrument (DESI) 2024 analysis. This paper focuses on the study of HOD systematics for luminous red galaxies (LRG). We consider three different HOD models for LRGs, including the base 5-parameter vanilla model and two extensions to it, that we refer to as baseline and extended models. The baseline model is described by the 5 vanilla HOD parameters, an incompleteness factor and a velocity bias parameter, whereas the extended one also includes a galaxy assembly bias and a satellite profile parameter. We utilize the 25 dark matter simulations available in the AbacusSummit simulation suite at z = 0.8 and generate mock catalogs for our different HOD models. To test the impact of the HOD modeling in the position of the BAO peak, we run BAO fits for all these sets of simulations and compare the best-fit BAO-scaling parameters α_iso and α_AP between every pair of HOD models. We do this for both Fourier and configuration spaces independently, using post-reconstruction measurements. We find a 3.3σ detection of HOD systematic for αAP in configuration space with an amplitude of 0.19%. For the other cases, we did not find a 3σ detection, and we decided to compute a conservative estimation of the systematic using the ensemble of shifts between all pairs of HOD models. By doing this, we quote a systematic with an amplitude of 0.07% in α_iso for both Fourier and configuration spaces; and of 0.09% in α_AP for Fourier space.

Original language	English
Article number	133
Pages (from-to)	1-39
Number of pages	39
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2025
Issue number	1
DOIs	https://doi.org/10.1088/1475-7516/2025/01/133
Publication status	Published - 30 Jan 2025

Keywords

astro-ph.CO
UKRI
STFC
ST/T005009/2

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10.1088/1475-7516/2025/01/133

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2404.03008v3
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Mena-Fernández, J., Garcia-Quintero, C., Yuan, S., Hadzhiyska, B., Alves, O., Rashkovetskyi, M., Seo, H., Padmanabhan, N., Nadathur, S., Howlett, C., Alam, S., Rocher, A., Ross, A. J., Sanchez, E., Ishak, M., Aguilar, J., Ahlen, S., Andrade, U., BenZvi, S., ... Zou, H. (2025). HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis. Journal of Cosmology and Astroparticle Physics, 2025(1), 1-39. Article 133. https://doi.org/10.1088/1475-7516/2025/01/133

@article{84989be363a14c8a96a604ebaaa2dd38,

title = "HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis",

abstract = "In this paper, we present the estimation of systematics related to the halo occupation distribution (HOD) modeling in the baryon acoustic oscillations (BAO) distance measurement of the Dark Energy Spectroscopic Instrument (DESI) 2024 analysis. This paper focuses on the study of HOD systematics for luminous red galaxies (LRG). We consider three different HOD models for LRGs, including the base 5-parameter vanilla model and two extensions to it, that we refer to as baseline and extended models. The baseline model is described by the 5 vanilla HOD parameters, an incompleteness factor and a velocity bias parameter, whereas the extended one also includes a galaxy assembly bias and a satellite profile parameter. We utilize the 25 dark matter simulations available in the AbacusSummit simulation suite at z = 0.8 and generate mock catalogs for our different HOD models. To test the impact of the HOD modeling in the position of the BAO peak, we run BAO fits for all these sets of simulations and compare the best-fit BAO-scaling parameters αiso and αAP between every pair of HOD models. We do this for both Fourier and configuration spaces independently, using post-reconstruction measurements. We find a 3.3σ detection of HOD systematic for αAP in configuration space with an amplitude of 0.19%. For the other cases, we did not find a 3σ detection, and we decided to compute a conservative estimation of the systematic using the ensemble of shifts between all pairs of HOD models. By doing this, we quote a systematic with an amplitude of 0.07% in αiso for both Fourier and configuration spaces; and of 0.09% in αAP for Fourier space.",

keywords = "astro-ph.CO, UKRI, STFC, ST/T005009/2",

author = "J. Mena-Fern{\'a}ndez and C. Garcia-Quintero and S. Yuan and B. Hadzhiyska and O. Alves and M. Rashkovetskyi and H. Seo and N. Padmanabhan and S. Nadathur and C. Howlett and S. Alam and A. Rocher and Ross, {A. J.} and E. Sanchez and M. Ishak and J. Aguilar and S. Ahlen and U. Andrade and S. BenZvi and D. Brooks and E. Burtin and S. Chen and X. Chen and T. Claybaugh and S. Cole and Macorra, {A. de la} and Mattia, {A. de} and Arjun Dey and B. Dey and Z. Ding and P. Doel and K. Fanning and Forero-Romero, {J. E.} and E. Gazta{\~n}aga and H. Gil-Mar{\'i}n and Gontcho, {S. Gontcho A} and G. Gutierrez and J. Guy and C. Hahn and K. Honscheid and S. Juneau and A. Kremin and M. Landriau and Guillou, {L. Le} and Levi, {M. E.} and M. Manera and P. Martini and L. Medina-Varela and A. Meisner and R. Miquel and J. Moustakas and E. Mueller and A. Mu{\~n}oz-Guti{\'e}rrez and Myers, {A. D.} and J. Nie and G. Niz and E. Paillas and N. Palanque-Delabrouille and Percival, {W. J.} and C. Poppett and A. P{\'e}rez-Fern{\'a}ndez and A. Rosado-Marin and G. Rossi and R. Ruggeri and C. Saulder and D. Schlegel and M. Schubnell and D. Sprayberry and G. Tarl{\'e} and M. Vargas-Maga{\~n}a and Weaver, {B. A.} and H. Zhang and H. Zou",

note = "36 pages, 9 figures. Supporting publication of DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars",

year = "2025",

month = jan,

day = "30",

doi = "10.1088/1475-7516/2025/01/133",

language = "English",

volume = "2025",

pages = "1--39",

journal = "Journal of Cosmology and Astroparticle Physics",

issn = "1475-7516",

publisher = "IOP Publishing",

number = "1",

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Mena-Fernández, J, Garcia-Quintero, C, Yuan, S, Hadzhiyska, B, Alves, O, Rashkovetskyi, M, Seo, H, Padmanabhan, N, Nadathur, S, Howlett, C, Alam, S, Rocher, A, Ross, AJ, Sanchez, E, Ishak, M, Aguilar, J, Ahlen, S, Andrade, U, BenZvi, S, Brooks, D, Burtin, E, Chen, S, Chen, X, Claybaugh, T, Cole, S, Macorra, ADL, Mattia, AD, Dey, A, Dey, B, Ding, Z, Doel, P, Fanning, K, Forero-Romero, JE, Gaztañaga, E, Gil-Marín, H, Gontcho, SGA, Gutierrez, G, Guy, J, Hahn, C, Honscheid, K, Juneau, S, Kremin, A, Landriau, M, Guillou, LL, Levi, ME, Manera, M, Martini, P, Medina-Varela, L, Meisner, A, Miquel, R, Moustakas, J, Mueller, E, Muñoz-Gutiérrez, A, Myers, AD, Nie, J, Niz, G, Paillas, E, Palanque-Delabrouille, N, Percival, WJ, Poppett, C, Pérez-Fernández, A, Rosado-Marin, A, Rossi, G, Ruggeri, R, Saulder, C, Schlegel, D, Schubnell, M, Sprayberry, D, Tarlé, G, Vargas-Magaña, M, Weaver, BA, Zhang, H & Zou, H 2025, 'HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis', Journal of Cosmology and Astroparticle Physics, vol. 2025, no. 1, 133, pp. 1-39. https://doi.org/10.1088/1475-7516/2025/01/133

TY - JOUR

T1 - HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis

AU - Mena-Fernández, J.

AU - Garcia-Quintero, C.

AU - Yuan, S.

AU - Hadzhiyska, B.

AU - Alves, O.

AU - Rashkovetskyi, M.

AU - Seo, H.

AU - Padmanabhan, N.

AU - Nadathur, S.

AU - Howlett, C.

AU - Alam, S.

AU - Rocher, A.

AU - Ross, A. J.

AU - Sanchez, E.

AU - Ishak, M.

AU - Aguilar, J.

AU - Ahlen, S.

AU - Andrade, U.

AU - BenZvi, S.

AU - Brooks, D.

AU - Burtin, E.

AU - Chen, S.

AU - Chen, X.

AU - Claybaugh, T.

AU - Cole, S.

AU - Macorra, A. de la

AU - Mattia, A. de

AU - Dey, Arjun

AU - Dey, B.

AU - Ding, Z.

AU - Doel, P.

AU - Fanning, K.

AU - Forero-Romero, J. E.

AU - Gaztañaga, E.

AU - Gil-Marín, H.

AU - Gontcho, S. Gontcho A

AU - Gutierrez, G.

AU - Guy, J.

AU - Hahn, C.

AU - Honscheid, K.

AU - Juneau, S.

AU - Kremin, A.

AU - Landriau, M.

AU - Guillou, L. Le

AU - Levi, M. E.

AU - Manera, M.

AU - Martini, P.

AU - Medina-Varela, L.

AU - Meisner, A.

AU - Miquel, R.

AU - Moustakas, J.

AU - Mueller, E.

AU - Muñoz-Gutiérrez, A.

AU - Myers, A. D.

AU - Nie, J.

AU - Niz, G.

AU - Paillas, E.

AU - Palanque-Delabrouille, N.

AU - Percival, W. J.

AU - Poppett, C.

AU - Pérez-Fernández, A.

AU - Rosado-Marin, A.

AU - Rossi, G.

AU - Ruggeri, R.

AU - Saulder, C.

AU - Schlegel, D.

AU - Schubnell, M.

AU - Sprayberry, D.

AU - Tarlé, G.

AU - Vargas-Magaña, M.

AU - Weaver, B. A.

AU - Zhang, H.

AU - Zou, H.

N1 - 36 pages, 9 figures. Supporting publication of DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars

PY - 2025/1/30

Y1 - 2025/1/30

N2 - In this paper, we present the estimation of systematics related to the halo occupation distribution (HOD) modeling in the baryon acoustic oscillations (BAO) distance measurement of the Dark Energy Spectroscopic Instrument (DESI) 2024 analysis. This paper focuses on the study of HOD systematics for luminous red galaxies (LRG). We consider three different HOD models for LRGs, including the base 5-parameter vanilla model and two extensions to it, that we refer to as baseline and extended models. The baseline model is described by the 5 vanilla HOD parameters, an incompleteness factor and a velocity bias parameter, whereas the extended one also includes a galaxy assembly bias and a satellite profile parameter. We utilize the 25 dark matter simulations available in the AbacusSummit simulation suite at z = 0.8 and generate mock catalogs for our different HOD models. To test the impact of the HOD modeling in the position of the BAO peak, we run BAO fits for all these sets of simulations and compare the best-fit BAO-scaling parameters αiso and αAP between every pair of HOD models. We do this for both Fourier and configuration spaces independently, using post-reconstruction measurements. We find a 3.3σ detection of HOD systematic for αAP in configuration space with an amplitude of 0.19%. For the other cases, we did not find a 3σ detection, and we decided to compute a conservative estimation of the systematic using the ensemble of shifts between all pairs of HOD models. By doing this, we quote a systematic with an amplitude of 0.07% in αiso for both Fourier and configuration spaces; and of 0.09% in αAP for Fourier space.

AB - In this paper, we present the estimation of systematics related to the halo occupation distribution (HOD) modeling in the baryon acoustic oscillations (BAO) distance measurement of the Dark Energy Spectroscopic Instrument (DESI) 2024 analysis. This paper focuses on the study of HOD systematics for luminous red galaxies (LRG). We consider three different HOD models for LRGs, including the base 5-parameter vanilla model and two extensions to it, that we refer to as baseline and extended models. The baseline model is described by the 5 vanilla HOD parameters, an incompleteness factor and a velocity bias parameter, whereas the extended one also includes a galaxy assembly bias and a satellite profile parameter. We utilize the 25 dark matter simulations available in the AbacusSummit simulation suite at z = 0.8 and generate mock catalogs for our different HOD models. To test the impact of the HOD modeling in the position of the BAO peak, we run BAO fits for all these sets of simulations and compare the best-fit BAO-scaling parameters αiso and αAP between every pair of HOD models. We do this for both Fourier and configuration spaces independently, using post-reconstruction measurements. We find a 3.3σ detection of HOD systematic for αAP in configuration space with an amplitude of 0.19%. For the other cases, we did not find a 3σ detection, and we decided to compute a conservative estimation of the systematic using the ensemble of shifts between all pairs of HOD models. By doing this, we quote a systematic with an amplitude of 0.07% in αiso for both Fourier and configuration spaces; and of 0.09% in αAP for Fourier space.

KW - astro-ph.CO

KW - UKRI

KW - STFC

KW - ST/T005009/2

U2 - 10.1088/1475-7516/2025/01/133

DO - 10.1088/1475-7516/2025/01/133

M3 - Article

SN - 1475-7516

VL - 2025

SP - 1

EP - 39

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - 1

M1 - 133

ER -

HOD-dependent systematics for luminous red galaxies in the DESI 2024 BAO analysis

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