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We present atmospheric parameters for 51 nearby FG dwarfs uniformly distributed over the -2.60 < [Fe/H] < +0.20 metallicity range that is suitable for the Galactic chemical evolution research. Lines of iron, Fe I and Fe II, were used to…

Solar and Stellar Astrophysics · Physics 2015-08-06 T. Sitnova , G. Zhao , L. Mashonkina , Y. Q. Chen , F. Liu , Yu. Pakhomov , K. Tan , M. Bolte , S. Alexeeva , F. Grupp , J. -R. Shi , H. -W. Zhang

The Fermi Large Area Telescope has observed an excess of ~GeV energy gamma rays from the center of the Milky Way, which may arise from near-thermal dark matter annihilation. Firmly establishing the dark matter origin for this excess is…

High Energy Astrophysical Phenomena · Physics 2020-07-22 Malte Buschmann , Nicholas L. Rodd , Benjamin R. Safdi , Laura J. Chang , Siddharth Mishra-Sharma , Mariangela Lisanti , Oscar Macias

The Kalman Filter is a widely used approach for the linear estimation of dynamical systems and is frequently employed within nuclear and particle physics experiments for the reconstruction of charged particle trajectories, known as tracks.…

Instrumentation and Detectors · Physics 2025-03-04 Xiaocong Ai , Heather M. Gray , Andreas Salzburger , Nicholas Styles

Emission of light fragments (LF) from nuclear reactions is an open question. Different reaction mechanisms contribute to their production; the relative roles of each, and how they change with incident energy, mass number of the target, and…

Nuclear Theory · Physics 2014-01-20 Leslie M. Kerby , Stepan G. Mashnik , Arnold J. Sierk

Multisine excitations are widely used for identifying multi-input multi-output systems due to their periodicity, data compression properties, and control over the input spectrum. Despite their popularity, the finite sample statistical…

Highly oscillatory differential equations present significant challenges in numerical treatments. The Modulated Fourier Expansion (MFE), used as an ansatz, is a commonly employed tool as a numerical approximation method. In this article,…

Numerical Analysis · Mathematics 2024-07-17 Rafał Perczyński , Antoni Augustynowicz

This study is motivated by the need to develop an efficient numerical model to simulate non-uniform interfacial degradation of reinforcing steel in concrete in an accelerated corrosion setup. In this study, a multi physics finite element…

Applied Physics · Physics 2021-12-23 Shanmukha Shetty , Sauvik Banerjee , Siddharth Tallur , Yogesh M. Desai

Thermally Activated Delayed Fluorescence (TADF) emitters must satisfy two competing requirements: small singlet-triplet energy gaps for thermal upconversion and sufficient spin-orbit coupling for fast reverse intersystem crossing.…

We present a simple physical model for populating dark matter halos with Lyman Alpha Emiiters(LAEs) and predict the physical properties of LAEs at z~3-7. The central tenet of this model is that the Ly-alpha luminosity is proportional to the…

Cosmology and Nongalactic Astrophysics · Physics 2010-08-27 Vithal Tilvi , Sangeeta Malhotra , James E. Rhoads , Evan Scannapieco , Robert J. Thacker , Ilian T. Iliev , Garrelt Mellema

With their advanced capabilities, Large Language Models (LLMs) can generate highly convincing and contextually relevant fake news, which can contribute to disseminating misinformation. Though there is much research on fake news detection…

Computation and Language · Computer Science 2026-02-05 Rupak Kumar Das , Jonathan Dodge

We present FEADME (Fast Elliptical Accretion Disk Modeling Engine), a GPU-accelerated Python framework for modeling broad Balmer-line emission using a relativistic elliptical accretion-disk formalism. Leveraging Jax and NumPyro for…

High Energy Astrophysical Phenomena · Physics 2025-12-12 Nicholas Earl , K. Decker French , Jason T. Hinkle , Yashasvi Moon , Margaret Shepherd , Margaret E. Verrico

Space-based gravitational wave observatories, such as LISA, Taiji, and TianQin, employ long-baseline laser interferometry, necessitating displacement measurement sensitivity at 1 pm/$\sqrt{Hz}$ level. A significant challenge in achieving…

Instrumentation and Methods for Astrophysics · Physics 2024-10-31 Ya-Zheng Tao , Rui-Hong Gao , Hong-Bo Jin , Zhen-Xiang Hao , Gang Jin , Yue-Liang Wu

An exact series expansion is now known for the Principal Field Emission Elliptic Function v, in terms of a complementary elliptic variable l' equal to y*y, where y is the Nordheim parameter. This expansion was originally found by using the…

Mathematical Physics · Physics 2007-08-08 Jonathan H. B. Deane , Richard G. Forbes , R. W. Shail

The break-down of the Born-Oppenheimer approximation is an important topic in chemical dynamics on metal surfaces. In this context, the most frequently used "work-horse" is electronic friction theory, commonly relying on friction…

Chemical Physics · Physics 2020-10-28 Nick Gerrits , J. Iñaki Juaristi , Jörg Meyer

The ability to describe production of light fragments (LF) is important for many applications, such as cosmic-ray-induced single event upsets (SEUs), radiation protection, and cancer therapy with proton and heavy-ion beams. The…

Nuclear Theory · Physics 2013-03-19 Leslie M. Kerby , Stepan G. Mashnik , Arnold J. Sierk

Lyman-Alpha Emitting galaxies (LAEs) are typically young, low-mass, star-forming galaxies with little extinction from interstellar dust. Their low dust attenuation allows their Ly$\alpha$ emission to shine brightly in spectroscopic and…

A recently proposed technique is described that provides improved nearside-farside (NF) decompositions of elastic scattering amplitudes. The technique, involving a new resummation formula for Legendre partial wave series, reduces the…

Chemical Physics · Physics 2007-05-23 R. Anni , J. N. L. Connor , C. Noli

Conventional physics-informed extreme learning machine (PIELM) often faces challenges in solving partial differential equations (PDEs) involving high-frequency and variable-frequency behaviors. To address these challenges, we propose a…

Machine Learning · Computer Science 2025-10-15 Fei Ren , Sifan Wang , Pei-Zhi Zhuang , Hai-Sui Yu , He Yang

A dissipative Lorentz-covariant Ohm's law which uses only the electromagnetic degrees of freedom is proposed. For large conductivity, Maxwell equations equipped with this Ohm's law reduce to the equations of Force-Free Electrodynamics (FFE)…

Astrophysics · Physics 2007-10-11 Andrei Gruzinov

Foundation models, large machine learning models trained on broad, multimodal datasets, have been gaining increasing attention in scientific applications due to their strong performance on diverse downstream tasks. Large Language Models…

High Energy Physics - Phenomenology · Physics 2025-10-07 Manuel Morales-Alvarado