Browse by author
Lookup NU author(s): Dr Dani LeonardORCiD
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
© 2021 American Physical Society. We study a phenomenological class of models where dark matter converts to dark radiation in the low redshift epoch. This class of models, dubbed DMDR, characterizes the evolution of comoving dark-matter density with two extra parameters, and may be able to help alleviate the observed discrepancies between early and late-time probes of the Universe. We investigate how the conversion affects key cosmological observables such as the cosmic microwave background (CMB) temperature and matter power spectra. Combining 3x2pt data from Year 1 of the Dark Energy Survey, Planck-2018 CMB temperature and polarization data, supernovae (SN) Type Ia data from Pantheon, and baryon acoustic oscillation (BAO) data from BOSS DR12, MGS and 6dFGS, we place new constraints on the amount of dark matter that has converted to dark radiation and the rate of this conversion. The fraction of the dark matter that has converted since the beginning of the Universe in units of the current amount of dark matter, ζ, is constrained at 68% confidence level to be <0.32 for DES-Y1 3x2pt data, <0.030 for CMB+SN+BAO data, and <0.037 for the combined dataset. The probability that the DES and CMB+SN+BAO datasets are concordant increases from 4% for the ΛCDM model to 8% (less tension) for DMDR. The tension in S8=σ8ωm/0.3 between DES-Y1 3x2pt and CMB+SN+BAO is slightly reduced from 2.3σ to 1.9σ. We find no reduction in the Hubble tension when the combined data is compared to distance-ladder measurements in the DMDR model. The maximum-posterior goodness-of-fit statistics of DMDR and ΛCDM model are comparable, indicating no preference for the DMDR cosmology over ΛCDM.
Author(s): Chen A, Huterer D, Lee S, Ferte A, Weaverdyck N, Alves O, Leonard CD, Maccrann N, Raveri M, Porredon A, Di Valentino E, Muir J, Lemos P, Liddle AR, Blazek J, Campos A, Cawthon R, Choi A, Dodelson S, Elvin-Poole J, Gruen D, Ross AJ, Secco LF, Sevilla-Noarbe I, Sheldon E, Troxel MA, Zuntz J, Abbott TMC, Aguena M, Allam S, Annis J, Avila S, Bertin E, Bhargava S, Bridle SL, Brooks D, Carnero Rosell A, Carrasco Kind M, Carretero J, Costanzi M, Crocce M, Da Costa LN, Pereira MES, Davis TM, Doel P, Eifler TF, Ferrero I, Fosalba P, Frieman J, Garcia-Bellido J, Gaztanaga E, Gerdes DW, Gruendl RA, Gschwend J, Gutierrez G, Hinton SR, Hollowood DL, Honscheid K, Hoyle B, James DJ, Jarvis M, Kuehn K, Lahav O, Maia MAG, Marshall JL, Menanteau F, Miquel R, Morgan R, Palmese A, Paz-Chinchon F, Plazas AA, Roodman A, Sanchez E, Scarpine V, Schubnell M, Serrano S, Smith M, Suchyta E, Tarle G, Thomas D, To C, Varga TN, Weller J, Wilkinson RD
Publication type: Article
Publication status: Published
Journal: Physical Review D
Year: 2021
Volume: 103
Issue: 12
Print publication date: 15/06/2021
Online publication date: 10/06/2021
Acceptance date: 29/04/2021
ISSN (print): 2470-0010
ISSN (electronic): 2470-0029
Publisher: American Physical Society
URL: https://doi.org/10.1103/PhysRevD.103.123528
DOI: 10.1103/PhysRevD.103.123528
Altmetrics provided by Altmetric
