Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces

By A. Mead, Catherine Heymans, L. Lombriser, J. Peacock, O. Steele, H. Winther. 2016

182 citations recorded by the source corpus.

We present an accurate non-linear matter power spectrum prediction scheme for a variety of extensions to the standard cosmological paradigm, which uses the tuned halo model previously developed in Mead et al.. We consider dark energy models that are both minimally and non-minimally coupled, massive neutrinos and modified gravitational forces with chameleon and Vainshtein screening mechanisms. In all cases we compare halo-model power spectra to measurements from high-resolution simulations. We show that the tuned halo model method can predict the non-linear matter power spectrum measured from simulations of parameterized w(a) dark energy models at the few per cent level for k 0:5hMpc 1 . An updated version of our publicly available HMCODE can be found at https://github.com/alexander-mead/hmcode.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/b3d670908ebea1dd26f1fd558e5d3f2e9d3bbe1b

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Citations in the corpus

KiDS-450: testing extensions to the standard cosmological model (2016, methodology): “An increase in the equation of state, such that w > −1, causes a scale-dependent suppression in the matter power spectrum relative to a cosmological constant (e.g. Joudaki & Kaplinghat 2012; Mead et al. 2016).”
KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering (2017, methodology): “…power spectrum obtained from CAMB can be extended to non-linear scales with either HALOFIT (Smith et al. 2003; Takahashi et al. 2012) or HMCODE 7 (Mead et al. 2015, 2016), where we advocate the latter in particular because of its ability to account for the impact of baryonic physics on the…”
The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth (2023, methodology): “While our baseline analysis incorporates the modeling of non-linear scales using the non-linear matter power spectrum prescription of Mead et al. (2016), we also present constraints that use linear theory only.”
Planck2018 results (2018, methodology): “2003) rather than the default HMcode (Mead et al. 2016), and by comparison to the linear theory result when the nonlinear corrections are entirely neglected.”
Cosmology from the Chinese Space Station Optical Survey (CSS-OS) (2019, methodology): “The HMcode is used to calculate the non-linear matter power spectrum for the wCDM model (Mead et al. 2015, 2016).”
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing (2016, methodology): “Mead et al. (2016) present an extension of the effective halo model to produce accurate non-linear matter power spectra for non-zero neutrino masses.”
hmcode-2020: improved modelling of non-linear cosmological power spectra with baryonic feedback (2020, methodology): “As in Mead et al. (2015, 2016), we take our halo profiles to be a modified form of those from Navarro, Frenk & White (NFW; 1997) ρc(M,r) ∝ 1 r/(νη rs)[1+ r/(νη rs)]2 , (17) with rs related to rv by the concentration parameter: c = rv/rs.”
KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters (2017, methodology): “(Lesgourgues & Tram 2011; Bird, Viel & Haehnelt 2012; see also Mead et al. 2016 for an alternative non-linear model for massive neutrino cosmologies).”
The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters (2023, methodology): “We use the mead2016 non-linear matter power spectrum prescription (Mead et al. 2015, 2016), but note that since our measurement mainly probes linear scales, this choice and baryonic feedback effects do not matter at current sensitivities.”
KiDS+VIKING-450: Cosmic shear tomography with optical and infrared data (2018, background): “The effect of massive neutrinos is included in the HMCodecalculation (Mead et al. 2016).”