79 citations · 193 across the 16 of their papers we have counts for
16 papers
Robust CMB polarisation mapmaking with a rotating half-wave plate
Wuhyun Sohn, Simon Biquard, Josquin Errard +1
We present a novel mapmaking method for obtaining unbiased estimates of CMB polarisation, tailored to modern CMB experiments with a rotating half-wave plate. These experiments are…
A GPU-Accelerated JAX Framework for Robust Parametric Component Separation and Clustering Optimization for CMB Polarization Satellites
Wassim Kabalan, Arianna Rizzieri, Wuhyun Sohn +6
We present a novel, JAX-powered implementation of a parametric component-separation method for CMB polarization data, explicitly designed to handle spatially varying foreground Spe…
Furax: A Modular JAX Framework for Linear Operators in Astrophysical and Cosmological Data Analysis
Pierre Chanial, Simon Biquard, Wassim Kabalan +10
The Framework for Unified and Robust data Analysis with JAX (Furax) is an open-source Python framework for modeling data acquisition systems and solving inverse problems in astroph…
Half-wave-plate non idealities propagated to component separated CMB -modes
Ema Tsang King Sang, Ema Tsang-King-Sang, Josquin Errard +5
We assess the impact of non-ideal, continuously rotating half-wave plates (HWPs) on cosmic microwave background (CMB) polarization measurements targeting large angular scale signal…
Searching for Cosmological Collider in the Planck CMB Data II: collider templates and Modal analysis
Petar Suman, Dong-Gang Wang, Wuhyun Sohn +2
Signatures of massive particles during inflation are highly informative targets for cosmological experiments. With recent progress on both theoretical and observational frontiers,…
How Significant are Cosmological Collider Signals in the Planck Data?
Petar Suman, Dong-Gang Wang, Wuhyun Sohn +2
The search for primordial non-Gaussianities (PNG) is theoretically well motivated but remains observationally challenging. Tight constraints with low significance for the standard…
The Simons Observatory: Validation of reconstructed power spectra from simulated filtered maps for the Small Aperture Telescope survey
Carlos Hervías-Caimapo, Kevin Wolz, Adrien La Posta +33
We present a transfer function-based method to estimate angular power spectra from filtered maps for cosmic microwave background (CMB) surveys. This is especially relevant for expe…
Searching for Cosmological Collider in the Planck CMB Data
Wuhyun Sohn, Dong-Gang Wang, James R. Fergusson +1
In this paper, we present the first comprehensive CMB data analysis of cosmological collider physics. New heavy particles during inflation can leave imprints in the primordial corr…
CMB bispectrum constraints on DHOST inflation
Wuhyun Sohn, Andrei Lazanu, Philippe Brax +1
We present the first direct constraints on a Degenerate Higher Order Scalar Tensor (DHOST) inflation model using the Planck 2018 Cosmic Microwave Background (CMB) results on non-Ga…
Searching for local features in primordial power spectrum using genetic algorithms
Kushal Lodha, Lucas Pinol, Savvas Nesseris +3
We present a novel methodology for exploring local features directly in the primordial power spectrum using a genetic algorithm (GA) pipeline coupled with a Boltzmann solver and Co…
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…
On the consistency of CDM with CMB measurements in light of the latest Planck, ACT, and SPT data
Rodrigo Calderón, Arman Shafieloo, Dhiraj Kumar Hazra +1
Using Gaussian Processes we perform a thorough, non-parametric consistency test of the CDM model when confronted with state-of-the-art TT, TE, and EE measurements of the anisotr…
Free-form reconstruction of primordial power spectrum using Planck CMB temperature and polarization
Wuhyun Sohn, Arman Shafieloo, Dhiraj Kumar Hazra
While the simplest inflationary models predict the primordial perturbations to be near scale-invariant, the primordial power spectrum (PPS) can exhibit oscillatory features in many…
Harnessing Unresolved Lensed Quasars: The Mathematical Foundation of the Fluctuation Curve
Satadru Bag, Wuhyun Sohn, Arman Shafieloo +1
Strong gravitational lensed quasars (QSOs) have emerged as powerful and novel cosmic probes as they can deliver crucial cosmological information, such as a measurement of the Hubbl…
The Simons Observatory: Astro2020 Decadal Project Whitepaper
The Simons Observatory Collaboration, Maximilian H. Abitbol, Shunsuke Adachi +280
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough…
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…