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We present the open source Python code BinaryStarSolver that solves for the orbital elements of a spectroscopic binary system. Given a time-series of radial velocity measurements, six orbital parameters are determined: the long-term mean,…

Solar and Stellar Astrophysics · Physics 2020-11-30 Nicholas Milson , Caroline Barton , Philip D. Bennett

We learn a latent space for easy capture, consistent interpolation, and efficient reproduction of visual material appearance. When users provide a photo of a stationary natural material captured under flashlight illumination, first it is…

Graphics · Computer Science 2021-09-13 Philipp Henzler , Valentin Deschaintre , Niloy J. Mitra , Tobias Ritschel

We present a multi-domain spectral method to compute initial data of binary systems in General Relativity. By utilizing adapted conformal coordinates, the vacuum region exterior to the gravitational sources is divided up into two subdomains…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Marcus Ansorg

We present a semi-analytical model to simulate bidirectional reflectance distribution function (BRDF) spectra of a rough slab layer containing impurities. This model has been optimized for fast computation in order to analyze hyperspectral…

We present a method to train self-binarizing neural networks, that is, networks that evolve their weights and activations during training to become binary. To obtain similar binary networks, existing methods rely on the sign activation…

Computer Vision and Pattern Recognition · Computer Science 2019-02-05 Fayez Lahoud , Radhakrishna Achanta , Pablo Márquez-Neila , Sabine Süsstrunk

Binary stars play a vital role in astrophysical research, as a good fraction of stars are in binaries. Binary fraction (BF) is known to change with stellar mass in the Galactic field, but such studies in clusters require binary…

Solar and Stellar Astrophysics · Physics 2021-11-29 Vikrant V. Jadhav , Kaustubh Roy , Naman Joshi , Annapurni Subramaniam

Binary stars are thought to be a controlling factor in globular cluster evolution, since they can heat the environmental stars by converting their binding energy to kinetic energy during dynamical interactions. Through such interaction, the…

Astrophysics of Galaxies · Physics 2013-04-29 Jun Ji , Joel N. Bregman

The radial profile of binary fraction may vary with environment and is of significant importance for studying the formation mechanisms of binary stars and their dynamical evolution within globular clusters (GCs) and galaxies. However,…

Astrophysics of Galaxies · Physics 2026-04-30 Xiejin Li , Fenghui Zhang , Yinghe Zhao , Cheng Li , Zhanwen Han , Yunkun Han , Xiaoyu Kang

The Generalized Bessel Function (GBF) extends the single variable Bessel function to several dimensions and indices in a nontrivial manner. Two-dimensional GBFs have been studied extensively in the literature and have found application in…

General Mathematics · Mathematics 2021-04-29 Parker Kuklinski , David A. Hague

For an interferometric array, an image of the sky can be synthesized from interferometric visibilities, which are the cross-correlations of the received electric voltages of pairs of array elements. However, to search for transient targets…

Instrumentation and Methods for Astrophysics · Physics 2025-10-14 Yingfeng Liu , Shijie Sun , Kaifeng Yu , Furen Deng , Shifan Zuo , Jixia Li , Yougang Wang , Fengquan Wu , Xuelei Chen

A simple phenomenological model of a binary granular mixture is developed and investigated numerically. We attempt to model the experimental system of [1,2] where a horizontally vibrated binary monolayer was found to exhibit a transition…

Statistical Mechanics · Physics 2009-11-10 George C. M. A. Ehrhardt , Andrew Stephenson , Pedro M. Reis

In this thesis, branching Brownian motion (BBM) is a random particle system where the particles diffuse on the real line according to Brownian motions and branch at constant rate into a random number of particles with expectation greater…

Probability · Mathematics 2013-04-02 Pascal Maillard

The Funk-Radon transform assigns to a function defined on the unit sphere its integrals along all great circles of the sphere. In this paper, we consider a frame decomposition of the Funk-Radon transform, which is a flexible alternative to…

Numerical Analysis · Mathematics 2023-05-16 Michael Quellmalz , Lukas Weissinger , Simon Hubmer , Paul D. Erchinger

Our aim is to calculate the evolution of Algol binaries within the framework of the osculating orbital theory, which considers the perturbing forces acting on the orbit of each star arising from mass exchange via Roche lobe overflow (RLOF).…

Solar and Stellar Astrophysics · Physics 2014-10-15 P. J. Davis , L. Siess , R. Deschamps

We present a generalization of the RBF-FD method that computes RBF-FD weights in finite-sized neighborhoods around the centers of RBF-FD stencils by introducing an overlap parameter $\delta \in [0,1]$ such that $\delta=1$ recovers the…

Numerical Analysis · Mathematics 2017-05-24 Varun Shankar

We here present a method of performing integrals of products of spherical Bessel functions (SBFs) weighted by a power-law. Our method, which begins with double-SBF integrals, exploits a differential operator $\hat{D}$ defined via Bessel's…

Classical Analysis and ODEs · Mathematics 2021-12-16 Kiersten Meigs , Zachary Slepian

In this paper we factorize matrix polynomials into a complete set of spectral factors using a new design algorithm and we provide a complete set of block roots (solvents). The procedure is an extension of the (scalar) Horner method for the…

Signal Processing · Electrical Eng. & Systems 2018-03-29 Belkacem Bekhiti , Abdelhakim Dahimene , Kamel Hariche , George F. Fragulis

In this paper we explore unsupervised spectral decomposition methods for distinguishing the effect of different spectral components for a set of consecutive spectra from an X-ray binary. We use well-established linear methods for the…

High Energy Astrophysical Phenomena · Physics 2015-01-22 Karri I. I. Koljonen

In this article, we define a doubling procedure for the bialgebra of specified Feynman graphs introduced in a previous paper \cite {DMB}. This is the vector space generated by the pairs $(\bar \Gamma, \bar \gamma)$ where $\bar \Gamma$ is a…

Mathematical Physics · Physics 2016-05-17 Mohamed Belhaj Mohamed

Fourier series multiscale method, a concise and efficient analytical approach for multiscale computation, will be developed out of this series of papers. In the sixth paper, exact analysis of the wave propagation in a beam with rectangular…

Numerical Analysis · Mathematics 2022-08-30 Weiming Sun , Zimao Zhang