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HOD-Dependent Systematics for Luminous Red Galaxies in the DESI 2024 BAO Analysis

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	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., Brooks, D., Burtin, E., Chen, S., Chen, X., Claybaugh, T., Cole, S., de la Macorra, A., de Mattia, A., Dey, Arjun, Dey, B., Ding, Z., Doel, P., Fanning, K., Forero-Romero, J. E., Gaztañaga, E., Gil-Marín, H., Gontcho, S. Gontcho A, Gutierrez, G., Guy, J., Hahn, C., Honscheid, K., Juneau, S., Kremin, A., Landriau, M., Guillou, L. Le, Levi, M. E., Manera, M., Martini, P., Medina-Varela, L., Meisner, A., Miquel, R., Moustakas, J., Mueller, E., Muñoz-Gutiérrez, A., Myers, A. D., Newman, J. A., Nie, J., Niz, G., Paillas, E., Palanque-Delabrouille, N., Percival, W. J., 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, B. A., Yu, J., Zhang, H., Zou, H.
Formato:	Preprint
Publicado:	2024
Materias:	Cosmology and Nongalactic Astrophysics
Acceso en línea:	Acceder al recurso
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_version_	1866916684181274624
author	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. Brooks, D. Burtin, E. Chen, S. Chen, X. Claybaugh, T. Cole, S. de la Macorra, A. de Mattia, A. Dey, Arjun Dey, B. Ding, Z. Doel, P. Fanning, K. Forero-Romero, J. E. Gaztañaga, E. Gil-Marín, H. Gontcho, S. Gontcho A Gutierrez, G. Guy, J. Hahn, C. Honscheid, K. Juneau, S. Kremin, A. Landriau, M. Guillou, L. Le Levi, M. E. Manera, M. Martini, P. Medina-Varela, L. Meisner, A. Miquel, R. Moustakas, J. Mueller, E. Muñoz-Gutiérrez, A. Myers, A. D. Newman, J. A. Nie, J. Niz, G. Paillas, E. Palanque-Delabrouille, N. Percival, W. J. 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, B. A. Yu, J. Zhang, H. Zou, H.
author_facet	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. Brooks, D. Burtin, E. Chen, S. Chen, X. Claybaugh, T. Cole, S. de la Macorra, A. de Mattia, A. Dey, Arjun Dey, B. Ding, Z. Doel, P. Fanning, K. Forero-Romero, J. E. Gaztañaga, E. Gil-Marín, H. Gontcho, S. Gontcho A Gutierrez, G. Guy, J. Hahn, C. Honscheid, K. Juneau, S. Kremin, A. Landriau, M. Guillou, L. Le Levi, M. E. Manera, M. Martini, P. Medina-Varela, L. Meisner, A. Miquel, R. Moustakas, J. Mueller, E. Muñoz-Gutiérrez, A. Myers, A. D. Newman, J. A. Nie, J. Niz, G. Paillas, E. Palanque-Delabrouille, N. Percival, W. J. 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, B. A. Yu, J. Zhang, H. Zou, H.
contents	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 $α_{\rm iso}$ and $α_{\rm AP}$ between every pair of HOD models. We do this for both Fourier and configuration spaces independently, using post-reconstruction measurements. We find a 3.3$σ$ detection of HOD systematic for $α_{\rm AP}$ in configuration space with an amplitude of 0.19%. For the other cases, we did not find a 3$σ$ 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 $α_{\rm iso}$ for both Fourier and configuration spaces; and of 0.09% in $α_{\rm AP}$ for Fourier space.
format	Preprint
id	arxiv_https___arxiv_org_abs_2404_03008
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	HOD-Dependent Systematics for Luminous Red Galaxies in the DESI 2024 BAO Analysis 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. Brooks, D. Burtin, E. Chen, S. Chen, X. Claybaugh, T. Cole, S. de la Macorra, A. de Mattia, A. Dey, Arjun Dey, B. Ding, Z. Doel, P. Fanning, K. Forero-Romero, J. E. Gaztañaga, E. Gil-Marín, H. Gontcho, S. Gontcho A Gutierrez, G. Guy, J. Hahn, C. Honscheid, K. Juneau, S. Kremin, A. Landriau, M. Guillou, L. Le Levi, M. E. Manera, M. Martini, P. Medina-Varela, L. Meisner, A. Miquel, R. Moustakas, J. Mueller, E. Muñoz-Gutiérrez, A. Myers, A. D. Newman, J. A. Nie, J. Niz, G. Paillas, E. Palanque-Delabrouille, N. Percival, W. J. 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, B. A. Yu, J. Zhang, H. Zou, H. Cosmology and Nongalactic Astrophysics 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 $α_{\rm iso}$ and $α_{\rm AP}$ between every pair of HOD models. We do this for both Fourier and configuration spaces independently, using post-reconstruction measurements. We find a 3.3$σ$ detection of HOD systematic for $α_{\rm AP}$ in configuration space with an amplitude of 0.19%. For the other cases, we did not find a 3$σ$ 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 $α_{\rm iso}$ for both Fourier and configuration spaces; and of 0.09% in $α_{\rm AP}$ for Fourier space.
title	HOD-Dependent Systematics for Luminous Red Galaxies in the DESI 2024 BAO Analysis
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2404.03008