The DESI DR1 Peculiar Velocity Survey: growth rate measurements from galaxy and momentum correlation functions
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866908690350604288 |
|---|---|
| author | Turner, R. J. Blake, C. Qin, F. Aguilar, J. Ahlen, S. Amsellem, A. J. Bautista, J. BenZvi, S. Bianchi, D. Brooks, D. Carr, A. Chaussidon, E. Claybaugh, T. Cuceu, A. de la Macorra, A. Doel, P. Douglass, K. 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. Howlett, C. Huterer, D. Ishak, M. Joyce, R. Kehoe, R. Kim, A. G. Kirkby, D. Kremin, A. Lahav, O. Lai, Y. Lamman, C. Landriau, M. Guillou, L. Le Leauthaud, A. 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. Pérez-Ràfols, I. Ross, C. Rossi, G. Said, K. Sanchez, E. Schlegel, D. Schubnell, M. Silber, J. Sprayberry, D. Tarlé, G. Weaver, B. A. Zarrouk, P. Zou, H. |
| author_facet | Turner, R. J. Blake, C. Qin, F. Aguilar, J. Ahlen, S. Amsellem, A. J. Bautista, J. BenZvi, S. Bianchi, D. Brooks, D. Carr, A. Chaussidon, E. Claybaugh, T. Cuceu, A. de la Macorra, A. Doel, P. Douglass, K. 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. Howlett, C. Huterer, D. Ishak, M. Joyce, R. Kehoe, R. Kim, A. G. Kirkby, D. Kremin, A. Lahav, O. Lai, Y. Lamman, C. Landriau, M. Guillou, L. Le Leauthaud, A. 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. Pérez-Ràfols, I. Ross, C. Rossi, G. Said, K. Sanchez, E. Schlegel, D. Schubnell, M. Silber, J. Sprayberry, D. Tarlé, G. Weaver, B. A. Zarrouk, P. Zou, H. |
| contents | Joint analysis of the local peculiar velocity and galaxy density fields offers a promising route to testing cosmological models of gravity. We present a measurement of the normalised growth rate of structure, $fσ_8$, from the two-point correlations of velocity and density tracers from the DESI DR1 Peculiar Velocity and Bright Galaxy Surveys, the largest catalogues of their kind assembled to date. We fit the two-point correlation measurements with non-linear correlation function models, constructed from density and momentum power spectra generated using 1-loop Eulerian perturbation theory, and validate our methodology using representative mock catalogues. We find $fσ_8 = 0.391^{+0.080}_{-0.081}$, consistent to within $1σ$ with accompanying analyses of the same datasets using power spectrum and maximum-likelihood fields methods. Combining these growth rate results from different methods including appropriate correlations, we find a consensus determination $fσ_8(z = 0.07) = 0.4497 \pm 0.0548$, consistent with predictions from \textit{Planck}$+Λ$CDM cosmology. Jointly fitting to this consensus low-redshift growth rate and the DESI DR1 full-shape clustering dataset, we measure gravitational growth index $γ_{\rm L} = 0.580^{+0.110}_{-0.110}$, consistent with the prediction of general relativity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_03230 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The DESI DR1 Peculiar Velocity Survey: growth rate measurements from galaxy and momentum correlation functions Turner, R. J. Blake, C. Qin, F. Aguilar, J. Ahlen, S. Amsellem, A. J. Bautista, J. BenZvi, S. Bianchi, D. Brooks, D. Carr, A. Chaussidon, E. Claybaugh, T. Cuceu, A. de la Macorra, A. Doel, P. Douglass, K. 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. Howlett, C. Huterer, D. Ishak, M. Joyce, R. Kehoe, R. Kim, A. G. Kirkby, D. Kremin, A. Lahav, O. Lai, Y. Lamman, C. Landriau, M. Guillou, L. Le Leauthaud, A. 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. Pérez-Ràfols, I. Ross, C. Rossi, G. Said, K. Sanchez, E. Schlegel, D. Schubnell, M. Silber, J. Sprayberry, D. Tarlé, G. Weaver, B. A. Zarrouk, P. Zou, H. Cosmology and Nongalactic Astrophysics Joint analysis of the local peculiar velocity and galaxy density fields offers a promising route to testing cosmological models of gravity. We present a measurement of the normalised growth rate of structure, $fσ_8$, from the two-point correlations of velocity and density tracers from the DESI DR1 Peculiar Velocity and Bright Galaxy Surveys, the largest catalogues of their kind assembled to date. We fit the two-point correlation measurements with non-linear correlation function models, constructed from density and momentum power spectra generated using 1-loop Eulerian perturbation theory, and validate our methodology using representative mock catalogues. We find $fσ_8 = 0.391^{+0.080}_{-0.081}$, consistent to within $1σ$ with accompanying analyses of the same datasets using power spectrum and maximum-likelihood fields methods. Combining these growth rate results from different methods including appropriate correlations, we find a consensus determination $fσ_8(z = 0.07) = 0.4497 \pm 0.0548$, consistent with predictions from \textit{Planck}$+Λ$CDM cosmology. Jointly fitting to this consensus low-redshift growth rate and the DESI DR1 full-shape clustering dataset, we measure gravitational growth index $γ_{\rm L} = 0.580^{+0.110}_{-0.110}$, consistent with the prediction of general relativity. |
| title | The DESI DR1 Peculiar Velocity Survey: growth rate measurements from galaxy and momentum correlation functions |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2512.03230 |