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Anomalies in the large-scale CMB temperature sky measured by WMAP have been suggested as possible evidence for a violation of statistical isotropy on large scales. In any physical model for broken isotropy, there are testable consequences…

天体物理学 · 物理学 2008-12-18 Cora Dvorkin , Hiranya V. Peiris , Wayne Hu

The breakdown of statistical homogeneity and isotropy of cosmic perturbations is a generic feature of ultra large scale structure of the cosmos, in particular, of non trivial cosmic topology. The statistical isotropy (SI) of the Cosmic…

天体物理学 · 物理学 2007-05-23 Amir Hajian , Tarun Souradeep

We test the statistical isotropy (SI) of the $E$-mode polarization of the cosmic microwave background (CMB) radiation observed by the Planck satellite using two statistics, namely, the contour Minkowski Tensor (CMT) and the Directional…

宇宙学与河外天体物理 · 物理学 2020-06-29 Joby P. Kochappan , Aparajita Sen , Tuhin Ghosh , Pravabati Chingangbam , Soumen Basak

Powerbox is a pure-Python package for creating and measuring structured fields with homogeneous and isotropic power spectra.

天体物理仪器与方法 · 物理学 2018-09-14 Steven G. Murray

The statistical expectation values of the temperature fluctuations of the Cosmic Microwave Background (CMB) are assumed to be preserved under rotations of the sky. We investigate the Statistical Isotropy (SI) of the CMB anisotropy maps…

天体物理学 · 物理学 2009-11-10 Amir Hajian , Tarun Souradeep , Neil Cornish

The small but measurable effect of weak gravitational lensing on the cosmic microwave background radiation provide information about the large-scale distribution of matter in the universe. We use the all sky distribution of matter, as…

宇宙学与河外天体物理 · 物理学 2021-08-11 Priya Goyal , Pravabati Chingangbam

This work describes the instrumental error budget for space-based measurements of the absolute flux of the sky synchrotron spectrum at frequencies below the ionospheric cutoff (<20 MHz). We focus on an architecture using electrically short…

天体物理仪器与方法 · 物理学 2024-09-11 Julie Rolla , Andrew Romero-Wolf , Joseph Lazio

Although many active scientific codes use modern Fortran, most contemporary scientific software "libraries" are implemented in C and C++. Providing their numerical, algorithmic, or data management features to Fortran codes requires writing…

软件工程 · 计算机科学 2019-07-04 Seth R. Johnson , Andrey Prokopenko , Katherine J. Evans

The Computational Crystallography Toolbox (CCTBX) is open-source software that allows for processing of crystallographic data, including from serial femtosecond crystallography (SFX), for macromolecular structure determination. We aim to…

生物物理 · 物理学 2023-07-06 Vidya Ganapati , Daniel Tchon , Aaron S. Brewster , Nicholas K. Sauter

Accurate measurements of the Cosmic Microwave Background (CMB) anisotropy call for high precision and reliability of the in-flight calibration. For extended surveys the CMB dipole provides an excellent calibration source at frequencies…

天体物理学 · 物理学 2009-11-10 B. Cappellini , D. Maino , G. Albetti , P. Platania , R. Paladini , A. Mennella , M. Bersanelli

SAMURAI is a tool for the automated numerical evaluation of one-loop corrections to any scattering amplitudes within the dimensional-regularization scheme. It is based on the decomposition of the integrand according to the OPP-approach,…

高能物理 - 唯象学 · 物理学 2014-11-21 P. Mastrolia , G. Ossola , T. Reiter , F. Tramontano

Isotropy-violation statistics can highlight polarized galactic foregrounds that contaminate primordial $B$-modes in the Cosmic Microwave Background (CMB). We propose a particular isotropy-violation test and apply it to polarized Planck 353…

宇宙学与河外天体物理 · 物理学 2016-09-23 Aditya Rotti , Kevin Huffenberger

Gaussianity of temperature fluctuations in the Cosmic Microwave Background(CMB) implies that the statistical properties of the temperature field can be completely characterized by its two point correlation function. The two point…

宇宙学与河外天体物理 · 物理学 2013-09-25 Nidhi Joshi , Aditya Rotti , Tarun Souradeep

Cosmological Boltzmann codes are often used by researchers for calculating the CMB angular power spectra from different theoretical models, for cosmological parameter estimation, etc. Therefore, the accuracy of a Boltzmann code is of utmost…

宇宙学与河外天体物理 · 物理学 2025-09-09 Santanu Das , Anh Phan

We address in this work the instrumental systematic errors that can potentially affect the forthcoming and future Cosmic Microwave Background experiments aimed at observing its polarized emission. In particular, we focus on the systematics…

宇宙学与河外天体物理 · 物理学 2021-06-14 Giuseppe Puglisi , Reijo Keskitalo , Ted Kisner , Julian D. Borrill

The Combustion Toolbox (CT) is a newly developed open-source thermochemical code designed to solve problems involving chemical equilibrium for both gas- and condensed-phase species. The kernel of the code is based on the theoretical…

化学物理 · 物理学 2026-01-06 Alberto Cuadra , César Huete , Marcos Vera

Even todays most advanced machine learning models are easily fooled by almost imperceptible perturbations of their inputs. Foolbox is a new Python package to generate such adversarial perturbations and to quantify and compare the robustness…

机器学习 · 计算机科学 2018-03-21 Jonas Rauber , Wieland Brendel , Matthias Bethge

The article presents and documents the Mathematica package SymBuild. This package implements the computation and manipulation of integrable symbols appearing in various calculations in high-energy scattering amplitudes. By using Gr\"obner…

高能物理 - 理论 · 物理学 2018-11-01 Vladimir Mitev , Yang Zhang

Any isotropy violating phenomena on cosmic microwave background (CMB) induces off-diagonal correlations in the two-point function. These correlations themselves can be used to estimate the underlying anisotropic signals. Masking due to…

宇宙学与河外天体物理 · 物理学 2015-10-09 Pavan K. Aluri , Nidhi Pant , Aditya Rotti , Tarun Souradeep

Recent developments in the search for inflationary gravitational waves in the cosmic microwave background (CMB) polarization motivate the search for new diagnostics to distinguish the Galactic foreground contribution to B modes from the…

宇宙学与河外天体物理 · 物理学 2014-11-11 Marc Kamionkowski , Ely D. Kovetz