| Title: |
It is not σ8: constraining the non-linear matter power spectrum with the Dark Energy Survey Year-5 supernova sample |
| Authors: |
Shah, P; Davis, TM; Vincenzi, M; Armstrong, P; Brout, D; Camilleri, R; Galbany, L; Gill, MSS; Huterer, D; Jeffrey, N; Lahav, O; Lee, J; Lidman, C; Möller, A; Sullivan, M; Whiteway, L; Wiseman, P; Allam, S; Aguena, M; Annis, J; Blazek, J; Brooks, D; Rosell, A Carnero; Carretero, J; Conselice, C; da Costa, LN; Pereira, MES; Desai, S; Diehl, HT; Doel, P; Everett, S; Ferrero, I; Flaugher, B; Frieman, J; García-Bellido, J; Gaztanaga, E; Giannini, G; Gruen, D; Gruendl, RA; Gutierrez, G; Hinton, SR; Hollowood, DL; Honscheid, K; James, DJ; Lee, S; Marshall, JL; Mena-Fernández, J; Miquel, R; Palmese, A; Pieres, A; Malagón, AA Plazas; Porredon, A; Samuroff, S; Sanchez, E; Sevilla-Noarbe, I; Smith, M; Suchyta, E; Swanson, MEC; Tarle, G; Tucker, DL; Weaverdyck, N; Casas, Ricard; Challis, Pete; Childress, Michael; Covarrubias, Ricardo; D'Andrea, Chris; Filippenko, Alex; Finley, David; Fisher, John; Förster, Francisco; Goldstein, Daniel; González-Gaitán, Santiago; Gupta, Ravi; Hamuy, Mario; Kuhlmann, Steve; Lasker, James; March, Marisa; Marriner, John; Morganson, Eric; Mosher, Jennifer; Swann, Elizabeth; Thomas, Rollin; Wolf, Rachel |
| Source: |
Monthly Notices of the Royal Astronomical Society, vol 537, iss 4 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2025 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
5106 Nuclear and Plasma Physics (for-2020); 5107 Particle and High Energy Physics (for-2020); 51 Physical Sciences (for-2020); 7 Affordable and Clean Energy (sdg); gravitational lensing: weak; galaxies: haloes; cosmology: cosmological parameters; cosmology: dark matter; transients: supernovae; 0201 Astronomical and Space Sciences (for); Astronomy & Astrophysics (science-metrix); 5101 Astronomical sciences (for-2020); 5109 Space sciences (for-2020) |
| Time: |
3814 - 3825 |
| Description: |
The weak gravitational lensing magnification of Type Ia supernovae (SNe Ia) is sensitive to the matter power spectrum on scales $k\gt 1 h$ Mpc$^{-1}$, making it unwise to interpret SNe Ia lensing in terms of power on linear scales. We compute the probability density function of SNe Ia magnification as a function of standard cosmological parameters, plus an empirical parameter $A_{\rm mod}$ which describes the suppression or enhancement of matter power on non-linear scales compared to a cold dark matter only model. While baryons are expected to enhance power on the scales relevant to SN Ia lensing, other physics such as neutrino masses or non-standard dark matter may suppress power. Using the Dark Energy Survey Year-5 sample, we find $A_{\rm mod} = 0.77^{+0.69}_{-0.40}$ (68per cent credible interval around the median). Although the median is consistent with unity there are hints of power suppression, with $A_{\rm mod} \lt 1.09$ at 68 per cent credibility. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt0jm9207j; https://escholarship.org/uc/item/0jm9207j; https://escholarship.org/content/qt0jm9207j/qt0jm9207j.pdf |
| DOI: |
10.1093/mnras/staf286 |
| Availability: |
https://escholarship.org/uc/item/0jm9207j; https://escholarship.org/content/qt0jm9207j/qt0jm9207j.pdf; https://doi.org/10.1093/mnras/staf286 |
| Rights: |
CC-BY |
| Accession Number: |
edsbas.D38F1D8E |
| Database: |
BASE |