2.4k citations · 8.7k across the 38 of their papers we have counts for
32 papers · 1 filter
High-resolution CMB bispectrum estimator with flexible modal basis
Wuhyun Sohn, James R. Fergusson, E. P. S. Shellard
We present a new independent pipeline for the CMB bispectrum estimation of primordial non-Gaussianity and release a public code for constraining bispectrum shapes of interest based…
Projected two- and three-point statistics: Forecasts and mitigation of non-linear RSDs
Oliver Leicht, Tobias Baldauf, James Fergusson +1
The combination of two- and three-point clustering statistics of galaxies and the underlying matter distribution has the potential to break degeneracies between cosmological parame…
Planck 2018 results. IX. Constraints on primordial non-Gaussianity
Planck Collaboration, Y. Akrami, F. Arroja +157
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare e…
General modal estimation for cross-bispectra
Maresuke Shiraishi, Michele Liguori, James R. Fergusson +1
We describe a fast, optimal estimator for measuring angular bispectra between two correlated weakly non-Gaussian fields ( and ) from observational datasets, based on a separa…
Advancing the matter bispectrum estimation of large-scale structure: a comparison of dark matter codes
Johnathan Hung, James R. Fergusson, E. P. S. Shellard
Cosmological information from forthcoming galaxy surveys, such as LSST and Euclid, will soon exceed that available from the CMB. Higher order correlation functions, like the bispec…
CMB-S4 forecast on the primordial non-Gaussianity parameter of feature models
Wuhyun Sohn, James Fergusson
We present forecasts on the primordial non-Gaussianity parameter of feature models for the future Cosmic Microwave Background Stage-4 (CMB-S4) experiments. The Fisher…
Planck 2018 results. X. Constraints on inflation
Planck Collaboration, Y. Akrami, F. Arroja +173
We report on the implications for cosmic inflation of the 2018 Release of the Planck CMB anisotropy measurements. The results are fully consistent with the two previous Planck cosm…
Planck 2018 results. I. Overview and the cosmological legacy of Planck
Planck Collaboration, Y. Akrami, F. Arroja +188
The European Space Agency's Planck satellite, which was dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave…
CMB bounds on tensor-scalar-scalar inflationary correlations
Maresuke Shiraishi, Michele Liguori, James R. Fergusson
The nonlinear interaction between one graviton and two scalars is enhanced in specific inflationary models, potentially leading to distinguishable signatures in the bispectrum of t…
Using inpainting to construct accurate cut-sky CMB estimators
H. F. Gruetjen, J. R. Fergusson, M. Liguori +1
The direct evaluation of manifestly optimal, cut-sky CMB power spectrum and bispectrum estimators is numerically very costly, due to the presence of inverse-covariance filtering op…
Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
Planck Collaboration, N. Aghanim, M. Arnaud +221
This paper presents the Planck 2015 likelihoods, statistical descriptions of the 2-point correlations of CMB data, using the hybrid approach employed previously: pixel-based at $\e…
Planck 2015 results. X. Diffuse component separation: Foreground maps
Planck Collaboration, R. Adam, P. A. R. Ade +236
Planck has mapped the microwave sky in nine frequency bands between 30 and 857 GHz in temperature and seven bands between 30 and 353 GHz in polarization. In this paper we consider…
Planck 2015 results. XXII. A map of the thermal Sunyaev-Zeldovich effect
Planck Collaboration, N. Aghanim, M. Arnaud +199
We have constructed all-sky y-maps of the thermal Sunyaev-Zeldovich (tSZ) effect by applying specifically tailored component separation algorithms to the 30 to 857 GHz frequency ch…
Planck 2015 results. XXIV. Cosmology from Sunyaev-Zeldovich cluster counts
Planck Collaboration, P. A. R. Ade, N. Aghanim +233
We present cluster counts and corresponding cosmological constraints from the Planck full mission data set. Our catalogue consists of 439 clusters detected via their Sunyaev-Zeldov…
Planck 2015 results. XIX. Constraints on primordial magnetic fields
Planck Collaboration, P. A. R. Ade, N. Aghanim +230
We compute and investigate four types of imprint of a stochastic background of primordial magnetic fields (PMFs) on the cosmic microwave background (CMB) anisotropies: the impact o…
Planck 2015 results. XVIII. Background geometry & topology
Planck Collaboration, P. A. R. Ade, N. Aghanim +223
Full-sky CMB maps from the 2015 Planck release allow us to detect departures from global isotropy on the largest scales. We present the first searches using CMB polarization for co…
Planck 2015 results. XV. Gravitational lensing
Planck Collaboration, P. A. R. Ade, N. Aghanim +227
We present the most significant measurement of the cosmic microwave background (CMB) lensing potential to date (at a level of 40 sigma), using temperature and polarization data fro…
Polyspectra searches for sharp oscillatory features in cosmic microwave sky data
J. R. Fergusson, H. F. Gruetjen, E. P. S. Shellard +1
We undertake a thorough search for signatures of sharp oscillatory features in the WMAP9 power spectrum and bispectrum as well as in the Planck power spectrum. For the first time,…
Combining power spectrum and bispectrum measurements to detect oscillatory features
J. R. Fergusson, H. F. Gruetjen, E. P. S. Shellard +1
The simplest inflationary models present us with few observable parameters to discriminate between them. A detection of features in the spectra of primordial density perturbations…
Observed parity-odd CMB temperature bispectrum
Maresuke Shiraishi, Michele Liguori, James R. Fergusson
Parity-odd non-Gaussianities create a variety of temperature bispectra in the cosmic microwave background (CMB), defined in the domain: . Thes…
Efficient optimal non-Gaussian CMB estimators with polarisation
J. R. Fergusson
In this paper we demonstrate an efficient method for including both CMB temperature and polarisation data in optimal non-Gaussian estimators. The method relies on orthogonalising t…
General parity-odd CMB bispectrum estimation
Maresuke Shiraishi, Michele Liguori, James R. Fergusson
We develop a methodology for estimating parity-odd bispectra in the cosmic microwave background (CMB). This is achieved through the extension of the original separable modal method…
Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
Planck Collaboration, P. A. R. Ade, N. Aghanim +237
The Planck nominal mission cosmic microwave background (CMB) maps yield unprecedented constraints on primordial non-Gaussianity (NG). Using three optimal bispectrum estimators, sep…
Effects and Detectability of Quasi-Single Field Inflation in the Large-Scale Structure and Cosmic Microwave Background
Emiliano Sefusatti, James R. Fergusson, Xingang Chen +1
Quasi-single field inflation predicts a peculiar momentum dependence in the squeezed limit of the primordial bispectrum which smoothly interpolates between the local and equilatera…