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The DESI DR1 peculiar velocity survey: growth rate measurements from the galaxy power spectrum

Fuente: arXiv

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Autori principali:	Qin, F., Blake, C., Howlett, C., Turner, R. J., Lodha, K., Bautista, J., Lai, Y., Amsellem, A. J., Aguilar, J., Ahlen, S., Bianchi, D., Brooks, D., BenZvi, S., Carr, A., Chaussidon, E., Claybaugh, T., Cuceu, A., de la Macorra, A., Douglass, K., Doel, P., Ferraro, S., Font-Ribera, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho, S. Gontcho A, Gutierrez, G., Guy, J., Herrera-Alcantar, H. K., Honscheid, K., Huterer, D., Ishak, M., Joyce, R., Kim, A. G., Kirkby, D., Kisner, T., Kremin, A., Lahav, O., Lamman, C., Landriau, M., Guillou, L. Le, Levi, M. E., Manera, M., Meisner, A., Miquel, R., Moustakas, J., Muñoz-Gutiérrez, A., Nadathur, S., Palanque-Delabrouille, N., Percival, W. J., Poppett, C., Prada, F., Perez-Rafols, I., Ross, C., Rossi, G., Sanchez, E., Schlegel, D., Said, K., Schubnell, M., Seo, H., Silber, J., Sprayberry, D., Tarle, G., Weaver, B. A., Zarrouk, P., Zhou, R., Zou, H.
Natura:	Preprint
Pubblicazione:	2025
Soggetti:	Cosmology and Nongalactic Astrophysics
Accesso online:	Acceder al recurso
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_version_	1866914330537099264
author	Qin, F. Blake, C. Howlett, C. Turner, R. J. Lodha, K. Bautista, J. Lai, Y. Amsellem, A. J. Aguilar, J. Ahlen, S. Bianchi, D. Brooks, D. BenZvi, S. Carr, A. Chaussidon, E. Claybaugh, T. Cuceu, A. de la Macorra, A. Douglass, K. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Guy, J. Herrera-Alcantar, H. K. Honscheid, K. Huterer, D. Ishak, M. Joyce, R. Kim, A. G. Kirkby, D. Kisner, T. Kremin, A. Lahav, O. Lamman, C. Landriau, M. Guillou, L. Le Levi, M. E. Manera, M. Meisner, A. Miquel, R. Moustakas, J. Muñoz-Gutiérrez, A. Nadathur, S. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Perez-Rafols, I. Ross, C. Rossi, G. Sanchez, E. Schlegel, D. Said, K. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarle, G. Weaver, B. A. Zarrouk, P. Zhou, R. Zou, H.
author_facet	Qin, F. Blake, C. Howlett, C. Turner, R. J. Lodha, K. Bautista, J. Lai, Y. Amsellem, A. J. Aguilar, J. Ahlen, S. Bianchi, D. Brooks, D. BenZvi, S. Carr, A. Chaussidon, E. Claybaugh, T. Cuceu, A. de la Macorra, A. Douglass, K. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Guy, J. Herrera-Alcantar, H. K. Honscheid, K. Huterer, D. Ishak, M. Joyce, R. Kim, A. G. Kirkby, D. Kisner, T. Kremin, A. Lahav, O. Lamman, C. Landriau, M. Guillou, L. Le Levi, M. E. Manera, M. Meisner, A. Miquel, R. Moustakas, J. Muñoz-Gutiérrez, A. Nadathur, S. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Perez-Rafols, I. Ross, C. Rossi, G. Sanchez, E. Schlegel, D. Said, K. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarle, G. Weaver, B. A. Zarrouk, P. Zhou, R. Zou, H.
contents	The large-scale structure of the Universe and its evolution encapsulate a wealth of cosmological information. A powerful means of unlocking this knowledge lies in measuring the auto-power spectrum and/or the cross-power spectrum of the galaxy density and momentum fields, followed by the estimation of cosmological parameters based on these spectrum measurements. In this study, we generalize the cross-power spectrum model to accommodate scenarios where the density and momentum fields are derived from distinct galaxy surveys. The growth rate of the large-scale structures of the Universe, commonly represented as $fσ_8$, is extracted by jointly fitting the monopole and quadrupole moments of the auto-density power spectrum, the monopole of the auto-momentum power spectrum, and the dipole of the cross-power spectrum. Our estimators, theoretical models and parameter-fitting framework have been tested using mocks, confirming their robustness and accuracy in retrieving the fiducial growth rate from simulation. These techniques are then applied to analyze the power spectrum of the DESI Bright Galaxy Survey and Peculiar Velocity Survey, and the fit result of the growth rate is $fσ_8=0.440^{+0.080}_{-0.096}$ at effective redshift $z_{\rm eff}=0.07$. By synthesizing the fitting outcomes from correlation functions, maximum likelihood estimation and power spectrum, yields a consensus value of $fσ_8(z_{\rm eff}=0.07) = 0.450 ^{+0.055}_{-0.055}$, and correspondingly we obtain $γ=0.580^{+0.110}_{-0.110}$, $Ω_\mathrm{m}=0.301^{+0.011}_{-0.011}$ and $σ_8=0.834^{+0.032}_{-0.032}$. The measured $fσ_8$ and $γ$ are consistent with the prediction of the $Λ$ Cold Dark Matter Model and General Relativity.
format	Preprint
id	arxiv_https___arxiv_org_abs_2512_03231
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	The DESI DR1 peculiar velocity survey: growth rate measurements from the galaxy power spectrum Qin, F. Blake, C. Howlett, C. Turner, R. J. Lodha, K. Bautista, J. Lai, Y. Amsellem, A. J. Aguilar, J. Ahlen, S. Bianchi, D. Brooks, D. BenZvi, S. Carr, A. Chaussidon, E. Claybaugh, T. Cuceu, A. de la Macorra, A. Douglass, K. Doel, P. Ferraro, S. Font-Ribera, A. Forero-Romero, J. E. Gaztañaga, E. Gontcho, S. Gontcho A Gutierrez, G. Guy, J. Herrera-Alcantar, H. K. Honscheid, K. Huterer, D. Ishak, M. Joyce, R. Kim, A. G. Kirkby, D. Kisner, T. Kremin, A. Lahav, O. Lamman, C. Landriau, M. Guillou, L. Le Levi, M. E. Manera, M. Meisner, A. Miquel, R. Moustakas, J. Muñoz-Gutiérrez, A. Nadathur, S. Palanque-Delabrouille, N. Percival, W. J. Poppett, C. Prada, F. Perez-Rafols, I. Ross, C. Rossi, G. Sanchez, E. Schlegel, D. Said, K. Schubnell, M. Seo, H. Silber, J. Sprayberry, D. Tarle, G. Weaver, B. A. Zarrouk, P. Zhou, R. Zou, H. Cosmology and Nongalactic Astrophysics The large-scale structure of the Universe and its evolution encapsulate a wealth of cosmological information. A powerful means of unlocking this knowledge lies in measuring the auto-power spectrum and/or the cross-power spectrum of the galaxy density and momentum fields, followed by the estimation of cosmological parameters based on these spectrum measurements. In this study, we generalize the cross-power spectrum model to accommodate scenarios where the density and momentum fields are derived from distinct galaxy surveys. The growth rate of the large-scale structures of the Universe, commonly represented as $fσ_8$, is extracted by jointly fitting the monopole and quadrupole moments of the auto-density power spectrum, the monopole of the auto-momentum power spectrum, and the dipole of the cross-power spectrum. Our estimators, theoretical models and parameter-fitting framework have been tested using mocks, confirming their robustness and accuracy in retrieving the fiducial growth rate from simulation. These techniques are then applied to analyze the power spectrum of the DESI Bright Galaxy Survey and Peculiar Velocity Survey, and the fit result of the growth rate is $fσ_8=0.440^{+0.080}_{-0.096}$ at effective redshift $z_{\rm eff}=0.07$. By synthesizing the fitting outcomes from correlation functions, maximum likelihood estimation and power spectrum, yields a consensus value of $fσ_8(z_{\rm eff}=0.07) = 0.450 ^{+0.055}_{-0.055}$, and correspondingly we obtain $γ=0.580^{+0.110}_{-0.110}$, $Ω_\mathrm{m}=0.301^{+0.011}_{-0.011}$ and $σ_8=0.834^{+0.032}_{-0.032}$. The measured $fσ_8$ and $γ$ are consistent with the prediction of the $Λ$ Cold Dark Matter Model and General Relativity.
title	The DESI DR1 peculiar velocity survey: growth rate measurements from the galaxy power spectrum
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2512.03231