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We describe Rabacus, a Python package for calculating the transfer of hydrogen ionizing radiation in simplified geometries relevant to astronomy and cosmology. We present example solutions for three specific cases: 1) a semi-infinite slab…

Cosmology and Nongalactic Astrophysics · Physics 2015-02-26 Gabriel Altay , John Wise

The characterization of exoplanet requires reliable determination of the fundamental parameters of their host stars. Spectral fitting plays an important role in this process. For the majority of stellar parameters matching synthetic spectra…

Solar and Stellar Astrophysics · Physics 2023-03-29 Ansgar Wehrhahn , Nikolai Piskunov , Tanja Ryabchikova

We present PetIGA, a code framework to approximate the solution of partial differential equations using isogeometric analysis. PetIGA can be used to assemble matrices and vectors which come from a Galerkin weak form, discretized with…

Mathematical Software · Computer Science 2015-07-29 Lisandro Dalcin , Nathan Collier , Philippe Vignal , Adriano M. A. Cortes , V. M. Calo

This work introduces the software tool Comprehensive Particle Identification (CPID). It is a modular approach to combined PID for future Higgs factories and implemented in the Key4hep framework. Its structure is explained, the current…

High Energy Physics - Experiment · Physics 2023-11-16 Ulrich Einhaus , Matthew Basso , Mikael Berggren , Valentina Cairo , Bohdan Dudar , Jenny List

The pole structure of the current GW/SAID partial-wave analysis of elastic $\pi N$ scattering and $\eta N$ production data is studied. Pole positions and residues are extracted from both the energy-dependent and single-energy fits, using…

Creating and maintaining computer readable geometries for use in Monte Carlo Radiation Transport (MCRT) simulations is an error-prone and time-consuming task. Simulating a system often requires geometry from different sources and modelling…

Computational Physics · Physics 2022-01-27 Stewart Boogert , Andrey Abramov , Laurence Nevay , William Shields , Stuart Walker

We present model spectral energy distribution (SED) fits to ultraviolet/optical/infrared observations for the 258 nearby galaxies in the Local Volume Legacy survey, a sample dominated by lower-luminosity dwarf irregular systems. The data…

Astrophysics of Galaxies · Physics 2023-06-07 Daniel A. Dale , Mederic Boquien , Jordan A. Turner , Daniela Calzetti , Robert C. Kennicutt , Janice C. Lee

Most particle induced X-ray emission (PIXE) data analysis codes are not focused on handling multilayered samples. We have developed an open-source library called "LibCPIXE", for PIXE data analysis. It is written in standard C and implements…

Materials Science · Physics 2007-07-18 C. Pascual-Izarra , N. P. Barradas , M. A. Reis

The cosmic spectral energy distribution (CSED) is the total emissivity as a function of wavelength of galaxies in a given cosmic volume. We compare the observed CSED from the UV to the submm to that computed from the EAGLE cosmological…

Astrophysics of Galaxies · Physics 2019-02-13 Maarten Baes , Ana Trčka , Peter Camps , Angelos Nersesian , James Trayford , Tom Theuns , Wouter Dobbels

In this paper, we present a new gas-grain chemical code for interstellar clouds written in pure Python (GGCHEMPY). By combining with the high-performance Python compiler Numba, GGCHEMPY is as efficient as the Fortran-based version. With the…

Astrophysics of Galaxies · Physics 2022-02-02 Jixing Ge

We present an efficient implementation of the Generalized Green's function Cluster Expansion (GGCE), which is a new method for computing the ground-state properties and dynamics of polarons (single electrons coupled to lattice vibrations)…

Computational Physics · Physics 2023-10-16 Matthew R. Carbone , Stepan Fomichev , Andrew J. Millis , Mona Berciu , David R. Reichman , John Sous

Goupil is a software library designed for the Monte Carlo transport of low-energy gamma-rays, such as those emitted from radioactive isotopes. The library is distributed as a Python module. It implements a dedicated backward sampling…

Computational Physics · Physics 2025-05-20 Valentin Niess , Kinson Vernet , Luca Terray

The observed atmospheric spectrum of exoplanets and brown dwarfs depends critically on the presence and distribution of atmospheric condensates. The Ackerman & Marley (2001) methodology for predicting the vertical distribution of condensate…

Earth and Planetary Astrophysics · Physics 2022-02-02 Caoimhe M. Rooney , Natasha E. Batalha , Peter Gao , Mark S. Marley

A multichannel analysis of cosmic ray electron and positron spectra and of the diffuse synchrotron emission of the Galaxy is performed by using the DRAGON code. This study is aimed at probing the interstellar electron source spectrum down…

High Energy Astrophysical Phenomena · Physics 2013-04-16 Giuseppe Di Bernardo , Carmelo Evoli , Daniele Gaggero , Dario Grasso , Luca Maccione

We developed a portable code for dissipative particle dynamics (DPD) simulations. This Fortran program named CAMUS has a couple of notable features. One is the omission of constructing the so-called neighboring particles list, providing a…

Chemical Physics · Physics 2018-07-03 Hideo Doi , Koji Okuwaki , Takamitsu Naito , Sona Saitou , Yuji Mochizuki

In this paper we present the publicly available open-source spectral energy distribution (SED) fitting code SMART (Spectral energy distributions Markov chain Analysis with Radiative Transfer models). Implementing a Bayesian Markov chain…

Astrophysics of Galaxies · Physics 2024-05-29 Charalambia Varnava , Andreas Efstathiou

The Galactic electron density model NE2001 describes the multicomponent ionized structure of the Milky Way interstellar medium. NE2001 forward models the dispersion and scattering of compact radio sources, including pulsars, fast radio…

Astrophysics of Galaxies · Physics 2024-01-12 S. K. Ocker , J. M. Cordes

This paper describes PyOED, a highly extensible scientific package that enables developing and testing model-constrained optimal experimental design (OED) for inverse problems. Specifically, PyOED aims to be a comprehensive Python toolkit…

Mathematical Software · Computer Science 2023-12-20 Abhijit Chowdhary , Shady E. Ahmed , Ahmed Attia

Synchrotron processes, the radiative processes associated with the interaction of energetic charged particles with magnetic field, are of interest in many areas in astronomy, from the interstellar medium to extreme environments near compact…

All major weather and climate applications are currently developed using languages such as Fortran or C++. This is typical in the domain of high performance computing (HPC), where efficient execution is an important concern. Unfortunately,…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-11-15 Enrique G. Paredes , Linus Groner , Stefano Ubbiali , Hannes Vogt , Alberto Madonna , Kean Mariotti , Felipe Cruz , Lucas Benedicic , Mauro Bianco , Joost VandeVondele , Thomas C. Schulthess
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