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Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Novell-Masot, S., Gil-Marín, H., Verde, L., Aguilar, J., Ahlen, S., Bailey, S., BenZvi, S., Bianchi, D., Brooks, D., Buckley-Geer, E., Rosell, A. Carnero, Chaussidon, E., Claybaugh, T., Cole, S., Cuceu, A., Dawson, K. S., de la Macorra, A., Demina, R., Dey, A., Dey, B., Doel, P., Ferraro, S., Font-Ribera, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho, S. Gontcho A, Gonzalez-Morales, A. X., Gutierrez, G., Herrera-Alcantar, H. K., Honscheid, K., Howlett, C., Juneau, S., Kehoe, R., Kirkby, D., Kisner, T., Kremin, A., Lamman, C., Landriau, M., Guillou, L. Le, Levi, M. E., Magneville, C., Manera, M., Meisner, A., Miquel, R., Moustakas, J., Muñoz-Gutiérrez, A., Myers, A. D., Nadathur, S., Niz, G., Noriega, H. E., Percival, W. J., Poppett, C., Prada, F., Pérez-Ràfols, I., Ross, A. J., Rossi, G., Samushia, L., Sanchez, E., Schlegel, D., Schubnell, M., Seo, H., Silber, J., Sprayberry, D., Tarlé, G., Vargas-Magaña, M., Weaver, B. A., Zarrouk, P., Zhou, R., Zou, H.
Formato:	Preprint
Publicado:	2025
Materias:	Cosmology and Nongalactic Astrophysics
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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author	Novell-Masot, S. Gil-Marín, H. Verde, L. Aguilar, J. Ahlen, S. Bailey, S. BenZvi, S. Bianchi, D. Brooks, D. Buckley-Geer, E. Rosell, A. Carnero Chaussidon, E. Claybaugh, T. Cole, S. Cuceu, A. Dawson, K. S. de la Macorra, A. Demina, R. Dey, A. Dey, B. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gonzalez-Morales, A. X. Gutierrez, G. Herrera-Alcantar, H. K. Honscheid, K. Howlett, C. Juneau, S. Kehoe, R. Kirkby, D. Kisner, T. Kremin, A. Lamman, C. Landriau, M. Guillou, L. Le Levi, M. E. Magneville, C. Manera, M. Meisner, A. Miquel, R. Moustakas, J. Muñoz-Gutiérrez, A. Myers, A. D. Nadathur, S. Niz, G. Noriega, H. E. Percival, W. J. Poppett, C. Prada, F. Pérez-Ràfols, I. Ross, A. J. Rossi, G. Samushia, L. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarlé, G. Vargas-Magaña, M. Weaver, B. A. Zarrouk, P. Zhou, R. Zou, H.
author_facet	Novell-Masot, S. Gil-Marín, H. Verde, L. Aguilar, J. Ahlen, S. Bailey, S. BenZvi, S. Bianchi, D. Brooks, D. Buckley-Geer, E. Rosell, A. Carnero Chaussidon, E. Claybaugh, T. Cole, S. Cuceu, A. Dawson, K. S. de la Macorra, A. Demina, R. Dey, A. Dey, B. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gonzalez-Morales, A. X. Gutierrez, G. Herrera-Alcantar, H. K. Honscheid, K. Howlett, C. Juneau, S. Kehoe, R. Kirkby, D. Kisner, T. Kremin, A. Lamman, C. Landriau, M. Guillou, L. Le Levi, M. E. Magneville, C. Manera, M. Meisner, A. Miquel, R. Moustakas, J. Muñoz-Gutiérrez, A. Myers, A. D. Nadathur, S. Niz, G. Noriega, H. E. Percival, W. J. Poppett, C. Prada, F. Pérez-Ràfols, I. Ross, A. J. Rossi, G. Samushia, L. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarlé, G. Vargas-Magaña, M. Weaver, B. A. Zarrouk, P. Zhou, R. Zou, H.
contents	We present the first joint analysis of the power spectrum and bispectrum using the Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI), focusing on Luminous Red Galaxies (LRGs) and quasars (QSOs) across a redshift range of $0.4\leq z\leq2.1$. By combining the two- and three-point statistics, we are able to partially break the degeneracy between the logarithmic growth rate, $f(z)$, and the amplitude of dark matter fluctuations, $σ_\textrm{s8}(z)$, which cannot be measured separately in analyses that only involve the power spectrum. In comparison with the (fiducial) Planck $Λ$CDM cosmology we obtain $f/f^\textrm{fid}=\{0.888_{-0.089}^{+0.186},0.977_{-0.220}^{+0.182},1.030_{-0.085}^{+0.368}\}$, $σ_{s8}/σ^\textrm{fid}_\textrm{s8}=\{1.224_{-0.133}^{+0.091},1.071_{-0.163}^{+0.278},1.000_{-0.223}^{+0.088}\}$ respectively for the three LRG redshift bins, corresponding to a cumulative 10.1\% constraint on $f$, and of 8.4\% on $σ_\textrm{s8}$, including the systematic error budget. The cumulative constraints for the ShapeFit compressed parameters from our joint power spectrum-bispectrum analysis are respectively $σ_{α_\textrm{iso}}=0.9\%$ (9\% improvement with respect to our power spectrum-only analysis); $σ_{α_\textrm{AP}}=2.3\%$ (no improvement with respect to power spectrum-only analysis, which is expected given that the bispectrum monopole has no significant anisotropic signal); $σ_{fσ_\textrm{s8}}=5.1\%$ (9\% improvement); $σ_{m+n}=2.3\%$ (11\% improvement). These results are fully consistent with the main DESI power spectrum analysis, demonstrating the robustness of the DESI cosmological constraints, and compatible with Planck $Λ$CDM cosmology.
format	Preprint
id	arxiv_https___arxiv_org_abs_2503_09714
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples Novell-Masot, S. Gil-Marín, H. Verde, L. Aguilar, J. Ahlen, S. Bailey, S. BenZvi, S. Bianchi, D. Brooks, D. Buckley-Geer, E. Rosell, A. Carnero Chaussidon, E. Claybaugh, T. Cole, S. Cuceu, A. Dawson, K. S. de la Macorra, A. Demina, R. Dey, A. Dey, B. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gonzalez-Morales, A. X. Gutierrez, G. Herrera-Alcantar, H. K. Honscheid, K. Howlett, C. Juneau, S. Kehoe, R. Kirkby, D. Kisner, T. Kremin, A. Lamman, C. Landriau, M. Guillou, L. Le Levi, M. E. Magneville, C. Manera, M. Meisner, A. Miquel, R. Moustakas, J. Muñoz-Gutiérrez, A. Myers, A. D. Nadathur, S. Niz, G. Noriega, H. E. Percival, W. J. Poppett, C. Prada, F. Pérez-Ràfols, I. Ross, A. J. Rossi, G. Samushia, L. Sanchez, E. Schlegel, D. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarlé, G. Vargas-Magaña, M. Weaver, B. A. Zarrouk, P. Zhou, R. Zou, H. Cosmology and Nongalactic Astrophysics We present the first joint analysis of the power spectrum and bispectrum using the Data Release 1 (DR1) of the Dark Energy Spectroscopic Instrument (DESI), focusing on Luminous Red Galaxies (LRGs) and quasars (QSOs) across a redshift range of $0.4\leq z\leq2.1$. By combining the two- and three-point statistics, we are able to partially break the degeneracy between the logarithmic growth rate, $f(z)$, and the amplitude of dark matter fluctuations, $σ_\textrm{s8}(z)$, which cannot be measured separately in analyses that only involve the power spectrum. In comparison with the (fiducial) Planck $Λ$CDM cosmology we obtain $f/f^\textrm{fid}=\{0.888_{-0.089}^{+0.186},0.977_{-0.220}^{+0.182},1.030_{-0.085}^{+0.368}\}$, $σ_{s8}/σ^\textrm{fid}_\textrm{s8}=\{1.224_{-0.133}^{+0.091},1.071_{-0.163}^{+0.278},1.000_{-0.223}^{+0.088}\}$ respectively for the three LRG redshift bins, corresponding to a cumulative 10.1\% constraint on $f$, and of 8.4\% on $σ_\textrm{s8}$, including the systematic error budget. The cumulative constraints for the ShapeFit compressed parameters from our joint power spectrum-bispectrum analysis are respectively $σ_{α_\textrm{iso}}=0.9\%$ (9\% improvement with respect to our power spectrum-only analysis); $σ_{α_\textrm{AP}}=2.3\%$ (no improvement with respect to power spectrum-only analysis, which is expected given that the bispectrum monopole has no significant anisotropic signal); $σ_{fσ_\textrm{s8}}=5.1\%$ (9\% improvement); $σ_{m+n}=2.3\%$ (11\% improvement). These results are fully consistent with the main DESI power spectrum analysis, demonstrating the robustness of the DESI cosmological constraints, and compatible with Planck $Λ$CDM cosmology.
title	Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2503.09714