Bibcode
Shah, P.; Davis, T. M.; Vincenzi, M.; Armstrong, P.; Brout, D.; Camilleri, R.; Galbany, L.; Gill, M. S. S.; 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.; Carnero Rosell, A.; Carretero, J.; Conselice, C.; da Costa, L. N.; Pereira, M. E. S.; Desai, S.; Diehl, H. T.; Doel, P.; Everett, S.; Ferrero, I.; Flaugher, B.; Frieman, J.; García-Bellido, J.; Gaztanaga, E.; Giannini, G.; Gruen, D.; Gruendl, R. A.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Lee, S.; Marshall, J. L.; Mena-Fernández, J.; Miquel, R.; Palmese, A.; Pieres, A.; Malagón, A. A. Plazas; Porredon, A.; Samuroff, S.; Sanchez, E.; Sevilla-Noarbe, I.; Smith, M.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Tucker, D. L.; 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; DES Collaboration
Bibliographical reference
Monthly Notices of the Royal Astronomical Society
Advertised on:
3
2025
Citations
4
Refereed citations
3
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 $A_{\rm mod} = 0.77^{+0.69}_{-0.40}$ (68 per 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.
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