Tootfinder

Dynamo Confinement of a Radiatively Spreading Solar Tachocline Revealed by Self-consistent Global Simulations
Loren I. Matilsky, Lydia Korre, Nicholas H. Brummell
https://arxiv.org/abs/2507.08256

Dynamo Confinement of a Radiatively Spreading Solar Tachocline Revealed by Self-consistent Global Simulations
The helioseismically observed solar tachocline is a thin internal boundary layer of shear that separates the rigidly-rotating solar radiative zone from the differentially-rotating convective zone and is believed to play a central role in the 22-year solar dynamo cycle. The observed thinness of the tachocline has long been a mystery, given the expected tendency of such shear to undergo radiative spreading. Radiative spreading is the process by which the meridional circulation and angular velocit…

Passive radiative cooling using temperature-dependent emissivity can sometimes outperform static emitters
Yeonghoon Jin, Jin-Woo Cho, Mikhail A. Kats
https://arxiv.org/abs/2506.11259

Passive radiative cooling using temperature-dependent emissivity can sometimes outperform static emitters
In passive sky-facing radiative cooling, wavelength-selective thermal emitters in the atmospheric transparency window of 8-13 $μ$m can reach lower temperatures compared to broadband emitters, but broadband emitters always have higher cooling power when the emitter is warmer than the ambient. Here, we propose a temperature-tunable thermal emitter that switches between a wavelength-selective state -- with high emissivity only in the atmospheric transparency window of 8-13 $μ$m -- and a broadban…

Systematic study of charm meson M1 radiative transitions
Binesh Mohan, Christas Mony A., Rohit Dhir
https://arxiv.org/abs/2506.10560 https://

Systematic study of charm meson M1 radiative transitions
Motivated by recent experimental advancements in the study of radiative decays of charmed mesons, we investigate the magnetic (transition) moments of vector mesons by applying the effective mass scheme, obtained from the one-gluon exchange interaction between quark-antiquark pairs. By incorporating high-precision experimental data from both heavy and light flavor sectors, we accurately account for the strong hyperfine interaction contributions to the quark and antiquark masses within mesons. We…

Unveiling Zn incorporation in CuInS$_2$ quantum dots: X-ray and optical analysis of doping effects, structural modifications and surface passivation
Andr\'es Burgos-Caminal, Brener R. C. Vale, Andr\'e F. V. Fonseca, Juan F. Hidalgo, Elisa P. P. Collet, L\'azaro Garc\'ia, V\'ictor Vega-Mayoral, Sa\"ul Garcia-Orrit, Iciar Arnay, Juan Cabanillas-Gonz\'alez, Laura Simonelli, Ana Fl\'avia Nogueira, Marco Ant\^onio Schiavon, Thomas J. Penfold, Lazaro A. Padil…

Unveiling Zn incorporation in CuInS$_2$ quantum dots: X-ray and optical analysis of doping effects, structural modifications and surface passivation
Quantum dots (QDs) exhibit unique properties arising from their reduced size and quantum confinement effects, including exceptionally bright and tunable photoluminescence. Among these, CuInS$_{2}$ QDs have gained significant attention owing to their remarkable broadband emission, making them highly desirable for various optoelectronic applications requiring efficient luminescent nanomaterials. However, maximizing radiative recombination in CuInS$_{2}$ QDs often necessitates minimizing intragap …

Tout Š l'heure Š la plage, on s'extasiait devant le spectacle des puces de mer sur la laisse de mer, les oiseaux limicoles s'en repaître (quand des gamins ne s'amusaient pas Š courir après eux pour les faire s'envoler)
Au retour, on a fait une recherche sur internet pour connaître son véritable nom : les talitres. Et on a découvert effarés des articles putaclics sur ce "redoutable animal capable de vous gâcher vos vacances"
À se demander si ça n'a …

Accurate Reduced Floating-Point Precision Implicit Monte Carlo
Simon Butson, Mathew Cleveland, Alex Long, Todd Palmer
https://arxiv.org/abs/2506.11962 http…

Accurate Reduced Floating-Point Precision Implicit Monte Carlo
This work describes methodologies to successfully implement the Implicit Monte Carlo (IMC) scheme for thermal radiative transfer in reduced-precision floating-point arithmetic. The methods used can be broadly categorized into scaling approaches and floating-point arithmetic manipulations. Scaling approaches entail re-scaling values to ensure computations stay within a representable range. Floating-point arithmetic manipulations involve changes to order of operations and alternative summation al…

Calibrated Lanthanide Atomic Data for Kilonova Radiative Transfer. I. Atomic Structure and Opacities
Andreas Fl\"ors, Ricardo Ferreira da Silva, Jos\'e P. Marques, Jorge M. Sampaio, Gabriel Mart\'inez-Pinedo
https://arxiv.org/abs/2507.07785

Calibrated Lanthanide Atomic Data for Kilonova Radiative Transfer. I. Atomic Structure and Opacities
The early spectra of the kilonova (KN) AT2017gfo following the binary neutron star merger GW170817 exhibit numerous features shaped by r-process nucleosynthesis products. Although a few species were tentatively detected, no third-peak elements were unambiguously identified, as the amount of atomic data required for radiative transfer modeling is immense. Although comprehensive atomic data, including atomic opacities, is now available for many elements, wavelength-calibrated data remains limited…

The Rosetta Stone Project. I. A suite of radiative magnetohydrodynamics simulations of high-mass star-forming clumps
Ugo Lebreuilly, Alessio Traficante, Alice Nucara, Ngo-Duy Tung, Patrick Hennebelle, Sergio Molinari, Ralf S. Klessen, Leonardo Testi, Veli-Matti Pelkonen, Milena Benedettini, Alessandro Coletta, Davide Elia, Chiara Mininni, Stefania Pezzuto, Juan D. Soler, Paolo Suin, Claudia Toci

The Rosetta Stone Project. I. A suite of radiative magnetohydrodynamics simulations of high-mass star-forming clumps
Context. Star formation and, in particular, high-mass star formation are key astrophysical processes that are far from being fully understood. Unfortunately, progress in these fields is slow because observations are hard to interpret as they cannot be directly compared to numerical simulations. Synthetic observations are therefore necessary to better constrain the models. Aims. With the Rosetta Stone project, we aim to develop an end-to-end pipeline to compare star formation simulations with ob…

Towards NNLO QCD predictions for off-shell top-quark pair production and decays
Luca Buonocore, Massimiliano Grazzini, Stefan Kallweit, Jonas M. Lindert, Chiara Savoini
https://arxiv.org/abs/2507.11410

Towards NNLO QCD predictions for off-shell top-quark pair production and decays
We consider QCD radiative corrections to $W^+W^-b {\bar b}$ production with leptonic decays and massive bottom quarks at the LHC. We perform an exact next-to-leading order (NLO) calculation within the $q_T$-subtraction formalism and validate it against an independent computation in the dipole subtraction scheme. Non-resonant and off-shell effects related to the top quarks and the leptonic decays of the $W^\pm$ bosons are consistently included. We also consider the approximation in which the rea…

Radiative decays of $P$-wave charmed baryons in the $SU(3)$ flavor $\bf6_F$ representation
Xuan Luo, Hua-Xing Chen, Er-Liang Cui, Hui-Min Yang, Dan Zhou, Zhi-Yong Zhou
https://arxiv.org/abs/2506.08335

Radiative decays of $P$-wave charmed baryons in the $SU(3)$ flavor $\bf6_F$ representation
We perform a comprehensive investigation of the radiative decays of $P$-wave charmed baryons in the $SU(3)$ flavor $\mathbf{6}_F$ representation, employing the light-cone QCD sum rule approach within the framework of heavy quark effective theory. We analyze their electromagnetic transitions into ground-state charmed baryons via photon emission. When combined with the mass spectra and strong decay properties previously studied in Ref.~\cite{Yang:2021lce}, our results constitute a systematic and …