Search Publications
The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample
Berger, E.; Kirshner, R. P.; Rest, A. +37 more
We present optical light curves, redshifts, and classifications for 365 spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey. We detail improvements to the PS1 SN photometry, astrometry, and calibration that reduce the systematic uncertainties in the PS1 SN Ia distances. We combine the subs…
Elucidating ΛCDM: Impact of Baryon Acoustic Oscillation Measurements on the Hubble Constant Discrepancy
Halpern, M.; Weiland, J. L.; Hinshaw, G. +3 more
We examine the impact of baryon acoustic oscillation (BAO) scale measurements on the discrepancy between the value of the Hubble constant (H 0) inferred from the local distance ladder and that from Planck cosmic microwave background (CMB) data. While the BAO data alone cannot constrain H 0, we show that combining the latest B…
Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data
Ade, P. A. R.; Chiang, H. C.; Bleem, L. E. +64 more
We present measurements of the E-mode polarization angular auto-power spectrum (EE) and temperature-E-mode cross-power spectrum (TE) of the cosmic microwave background (CMB) using 150 GHz data from three seasons of SPTpol observations. We report the power spectra over the spherical harmonic multipole range 50< {\ell }≤slant 8000 and detect nine…
Evolution of the f σ8 tension with the Planck15 /Λ CDM determination and implications for modified gravity theories
Kazantzidis, Lavrentios; Perivolaropoulos, Leandros
We construct an updated extended compilation of distinct (but possibly correlated) f σ8(z ) redshift space distortion (RSD) data published between 2006 and 2018. It consists of 63 datapoints and is significantly larger than previously used similar data sets. After fiducial model correction we obtain the best fit Ω0 m-σ8<…
Reducing the H0 and σ8 tensions with dark matter-neutrino interactions
Di Valentino, Eleonora; Bœhm, Céline; Bouchet, François R. +1 more
The introduction of dark matter-neutrino interactions modifies the cosmic microwave background (CMB) angular power spectrum at all scales, thus affecting the reconstruction of the cosmological parameters. Such interactions can lead to a slight increase of the value of H0 and a slight decrease of S8≡σ8√{Ωm
Implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions
Kamionkowski, Marc; Boddy, Kimberly K.; Poulin, Vivian +1 more
We perform a comprehensive analysis of the most common early- and late-universe solutions to the H0 , Ly -α , and S8 discrepancies. When considered on their own, massive neutrinos provide a natural solution to the S8 discrepancy at the expense of increasing the H0 tension. If all extensions are considere…
Vacuum phase transition solves the H0 tension
Di Valentino, Eleonora; Melchiorri, Alessandro; Linder, Eric V.
Taking the Planck cosmic microwave background data and the more direct Hubble constant measurement data as unaffected by systematic offsets, the values of the Hubble constant H0 interpreted within the Λ CDM cosmological constant and cold dark matter cosmological model are in ∼3.3 σ tension. We show that the Parker vacuum metamorphosis (…
Using the full power of the cosmic microwave background to probe axion dark matter
Hložek, Renée; Grin, Daniel; Marsh, David J. E.
The cosmic microwave background (CMB) places stringent constraints on models of dark matter (DM), and on the initial conditions of the Universe. The full Planck data set is used to test the possibility that some fraction of the DM is composed of ultralight axions (ULAs). This represents the first use of CMB lensing to test the ULA model. We find n…
The Atacama Cosmology Telescope: The Two-season ACTPol Sunyaev-Zel’dovich Effect Selected Cluster Catalog
Hilton, Matt; Hasselfield, Matthew; Sifón, Cristóbal +41 more
We present a catalog of 182 galaxy clusters detected through the Sunyaev-Zel’dovich (SZ) effect by the Atacama Cosmology Telescope in a contiguous 987.5 deg2 field. The clusters were detected as SZ decrements by applying a matched filter to 148 GHz maps that combine the original ACT equatorial survey with data from the first two observi…
Structure formation in f(T) gravity and a solution for H0 tension
Nunes, Rafael C.
We investigate the evolution of scalar perturbations in f(T) teleparallel gravity and its effects on the cosmic microwave background (CMB) anisotropy. The f(T) gravity generalizes the teleparallel gravity which is formulated on the Weitzenböck spacetime, characterized by the vanishing curvature tensor (absolute parallelism) and the non-vanishing t…