bluuebunny/crossref_metadata_2025_split huggingface dataset:
Orbits of Six Triple Systems
Authors: Tokovinin Andrei 
Published: February 2025

Abstract
Joint analysis of position measurements and radial velocities of six triple stellar systems is conducted to determine their inner and/or outer orbits. Accumulation of such data is needed to study the architecture of stellar hierarchies and its relation to the formation mechanisms. The inner periods in the six systems (HIP 11783, 64836, 72423, 84720, 89234, and 105404) range from 0.5 days to 44 yr. The shortest outer period of 3.34 yr is found in the compact triple HIP 105404 (BS Ind). The resolved triple system HIP 64836 has comparable inner and outer periods (5 and 30 yr), placing it near the limit of dynamical stability, while its quasi-circular and coplanar orbits suggest a 1:6 mean motion resonance. The periods in HIP 89234 (44 and ~450 yr) are also comparable, but the mutual orbit inclination is large, 54°. Masses of the components are estimated and each system is discussed individually.
Determination of the Analytical Solutions of the Radio Emission Geometry and Polar Cap Structure of Pulsars Having Perturbed Dipole
Authors: Roy Tridib , Tamilan Mageshwaran , Das Ramkrishna 
Published: February 2025

Abstract
We model an analytical solution to generate the shape of the polar cap structure and discuss the geometrical distortion due to the presence of both longitudinal plasma current flow across the polar cap regime, i.e., polar cap current perturbation, and pulsar rotation, i.e., rotational perturbation. An analytical solution to the parameter space associated with the radio emission geometrical coordinate is produced by using the first- and second-order power series expansion method for the rotationally perturbed dipole case. In general, polar caps show a quasi-elliptical shape, but in the presence of higher-order plasma current our results show that they can be converted into an elliptical structure with a monotonically reduced dimension. Our results show that the rotational effect also leads to a contraction of the dimensions of the polar cap for a given range of the obliquity parameters. We have found that the last open field line constant, as a fraction of the light cylinder radius, decreases in the presence of nonzero plasma current discharge. We also demonstrate that under certain conditions introducing a higher-order plasma current (e.g., with a scale factor ζ

p
= J/J
GJ close to 1 in the closed field line region) can lead to a structure resembling a cosmic-combed magnetosphere.
Late-time Optical and X-Ray Emission Evolution of the Oxygen-rich SN 1996cr
Authors: Patnaude Daniel , Weil Kathryn E. , Fesen Robert A. , Milisavljevic Dan , Kraft Ralph P. 
Published: February 2025

Abstract
When the ejecta of a supernova (SN) interact with the progenitor star's circumstellar environment, a strong shock is driven back into the ejecta, causing the material to become bright optically and in X-rays. Most notably, as the shock traverses the H-rich envelope, it begins to interact with metal-rich material. Thus, continued monitoring of bright and nearby SNe provides valuable clues about both the progenitor structure and its pre-SN evolution. Here we present late-time, multiepoch optical and Chandra X-ray spectra of the core-collapse SN, SN 1996cr. Magellan IMACS optical spectra taken in 2017 July and 2021 August show a very different spectrum from that seen in 2006 with broad, double-peaked optical emission lines of oxygen, argon, and sulfur with expansion velocities of ±4500 km s−1. Redshifted emission components are considerably fainter compared to the blueshifted components, presumably due to internal extinction from dust in the SN ejecta. Broad ±2400 km s−1 Hα is also seen, which we infer is shocked progenitor pre-SN, mass-loss, H-rich material. Chandra data indicate a slow but steady decline in the overall X-ray luminosity, suggesting that the forward shock has broken through any circumstellar shell or torus, which is inferred from prior deep Chandra ACIS-S/HETG observations. The X-ray properties are consistent with what is expected from a shock breaking out into a lower-density environment. Though originally identified as a Type IIn SN, based upon late-time optical emission-line spectra, we argue that the SN 1996cr progenitor was partially or highly stripped, suggesting a Type IIb/Ib SN.
MAGICS. II. Seed Black Holes Stripped of Their Surrounding Stars Do Not Sink
Authors: Zhou 周 Yihao 亦豪 , Mukherjee Diptajyoti , Chen Nianyi , Di Matteo Tiziana , Johansson Peter H. , Rantala Antti , Partmann Christian , Di Carlo Ugo Niccolò , Bird Simeon , Ni Yueying 
Published: February 2025

Abstract
Massive black hole (MBH) seed mergers are expected to be among the loudest sources of gravitational waves detected by the Laser Interferometer Space Antenna, providing a unique window into the birth and early growth of MBHs. We present the MAGICS-II simulation suite, which consists of six galaxy mergers that result in MBH seed mergers identified in the cosmological simulation ASTRID. With the enhanced resolution (mass resolution: 500 M
⊙; softening length: 5 pc), improved subgrid models for the MBH dynamics and accretion, and the accurate regularized gravity integrator included in KETJU, we trace MBH seed dynamics down to 0.1 pc. After evolving all the systems for ≈1.2 Gyr in three stages (MAGICS-2000, MAGICS-500, and MAGICS-K), we find in four of the six systems that the MBHs stall at separations Δr ≳ 200 pc. Only in two systems, the MBHs manage to sink further, and only in one of them a bound binary forms. In the sinking systems, the MBH retains a population of bound stars. The final separation between the MBH is related to the surrounding unstripped stellar (and/or dark matter) mass: if more than 90% of the surrounding stellar system is stripped away, the MBHs stall. Besides the unstripped stars from the original host galaxy, we find that newly formed stars bound to the MBH significantly contribute to its sinking. Resolving the stellar system around MBH seeds, and its induced tidal interactions and dynamical friction is key for accurately capturing MBH dynamics. For this, high-resolution simulations are required. In a companion paper (MAGICS-III), we resimulate the central regions of these systems with an increased resolution to model directly the effects of actual star clusters around MBHs.
Spatial and Temporal Distribution of Nanoflare Heating during Active Region Evolution
Authors: Mondal Biswajit , Klimchuk James A. , Winebarger Amy R. , Athiray P. S. , Liu Jiayi 
Published: February 2025

Abstract
Nanoflares are believed to be key contributors to heating solar nonflaring active regions, though their individual detection remains challenging. This study uses a data-driven field-aligned hydrodynamic model to examine nanoflare properties throughout the lifecycle of active region (AR) 12758. We simulate coronal loop emissions, where each loop is heated by random nanoflares depending on the loop parameters derived from photospheric magnetograms observed by the Solar Dynamics Observatory/Helioseismic and Magnetic Imager. Simulated X-ray flux and temperature can reproduce the temporal variations observed by the Chandrayaan-2/Solar X-ray Monitor. Our findings show that high-frequency nanoflares contribute to cool emissions across the AR, while low- and intermediate-frequency primarily contribute to hot emissions. During the emerging phase, energy deposition is dominated by low-frequency events. Post-emergence, energy is deposited by both low- and intermediate-frequency nanoflares, while as the AR ages, the contribution from intermediate- and high-frequency nanoflares increases. The spatial distribution of heating frequencies across the AR reveals a clear pattern: the core of the active region spends most of its time in a low-frequency heating state, the periphery is dominated by high-frequency heating, and the region between the core and periphery experiences intermediate-frequency heating.
GD-1 Stellar Stream and Cocoon in the DESI Early Data Release
Authors: Valluri M. , Fagrelius P. , Koposov S. E. , Li T. S. , Gnedin Oleg Y. , Bell E. F. , Carlberg R. G. , Cooper A. P. , Aguilar J. , Ahlen S. , Allende Prieto C. , Belokurov V. , Beraldo e Silva L. , Brooks D. , Byström A. , Claybaugh T. , Dawson K. , Dey A. , Doel P. , Forero-Romero J. E. , Gaztañaga E. , Gontcho A Gontcho S. , Han J. , Honscheid K. , Kisner T. , Kremin A. , Lambert A. , Landriau M. , Le Guillou L. , Levi M. E. , de la Macorra A. , Manera M. , Martini P. , Medina G. E. , Meisner A. , Miquel R. , Moustakas J. , Myers A. D. , Najita J. , Poppett C. , Prada F. , Rezaie M. , Rossi G. , Riley A. H. , Sanchez E. , Schlegel D. , Schubnell M. , Sprayberry D. , Tarlé G. , Thomas G. , Weaver B. A. , Wechsler R. H. , Zhou R. , Zou H. 
Published: February 2025

Abstract
We present ∼115 new spectroscopically identified members of the GD-1 tidal stream observed with the 5000-fiber Dark Energy Spectroscopic Instrument (DESI). We confirm the existence of a “cocoon,” which is a broad (FWHM ∼ 2

.

°

932 ∼ 460 pc) and kinematically hot (velocity dispersion, σ ∼ 5–8 km s−1) component that surrounds a narrower (FWHM ∼ 0

.

°

353 ∼ 55 pc) and colder [(σ = 3.09 ± 0.76 km s−1)] thin stream component (based on a median per star velocity precision of 2.7 km s−1). The cocoon extends over at least a 30∘ segment of the stream observed by DESI. The thin and cocoon components have similar mean values of [Fe/H]: −2.54 ± 0.04 dex and −2.47 ± 0.06 dex, suggestive of a common origin. The data are consistent with the following scenarios for the origin of the cocoon. The progenitor of the GD-1 stream was an accreted globular cluster (GC) and: (a) the cocoon was produced by pre-accretion tidal stripping of the GC while it was still inside its parent dwarf galaxy; (b) the cocoon comprises debris from the parent dwarf galaxy; (c) an initially thin GC tidal stream was heated by impacts from dark subhalos in the Milky Way; (d) an initially thin GC stream was heated by a massive Sagittarius dwarf galaxy; or a combination of some of these. Future DESI spectroscopy and detailed modeling may enable us to distinguish between these possible origins.
SPOCK 2.0: Updates to the FeatureClassifier in the Stability of Planetary Orbital Configurations Klassifier
Authors: Thadhani Elio , Ba 巴 Yanming 燕鸣 , Rein Hanno , Tamayo Daniel 
Published: February 2025

Abstract
The Stability of Planetary Orbital Configurations Klassifier (SPOCK) package collects machine learning models for predicting the stability and collisional evolution of compact planetary systems. In this paper we explore improvements to SPOCK’s binary stability classifier (FeatureClassifier), which predicts orbital stability by collecting data over a short N-body integration of a system. We find that by using a system-specific timescale (rather than a fixed 104 orbits) for the integration, and by using this timescale as an additional feature, we modestly improve the model’s AUC metric from 0.943 to 0.950 (AUC = 1 for a perfect model). We additionally discovered that ≈10% of N-body integrations in SPOCK’s original training data set were duplicated by accident, and that <1% were misclassified as stable when they in fact led to ejections. We provide a cleaned data set of 100,000+ unique integrations, release a newly trained stability classification model, and make minor updates to the API.
Deux grammaires de l’arabe à contre-courant : A Grammar of the Classical Arabic Language de M. S. Howell et la Grammaire arabe composée d’après les sources primitives de D. Vernier
Authors: Guillaume Jean-Patrick 
Published: February 2025

La grammaire arabe de M. S. Howell (1880-1911) et celle de D. Vernier (1891-1892) se caractérisent par le fait qu’elles se fondent de manière exclusive sur la tradition grammaticale autochtone. Cette orientation va à l’encontre de la tendance alors dominante dans les études arabes et sémitiques, marquées par l’hégémonie du paradigme historico-comparatiste. Après avoir tenté de dégager les motivations d’un tel projet, cet article examine la démarche respective des deux auteurs, et aborde enfin la question de leur réception, à l’époque de leur publication et sur le long terme.
Premières découvertes des langues sibériennes et caucasiennes
Authors: Espagne Michel 
Published: February 2025

L’étude des langues inconnues repose dans un premier temps sur l’accumulation d’une documentation portant sur les mots, les structures grammaticales et aussi, à une époque plus récente, sur la substance phonique. On attribue le mérite de cette première phase exploratoire aux missionnaires. Or les savants allemands parcourant la Sibérie et le Caucase au xviiie siècle mettent en évidence un mode très différent de constitution d’une documentation et surtout des modèles épistémologiques originaux méritant d’autant plus l’attention qu’ils correspondent à une phase préparatoire dans la genèse de la linguistique et de l’anthropologie comme sciences.
Les Preliminari a una storia del cinema de Guido Oldrini. Contribution à une méthode historiographique marxiste
Authors: Mortari Virgilio 
Published: February 2025

Dans un contexte où l’on s’interroge de plus en plus sur les limites de l’histoire du cinéma, deux ouvrages ouvertement polémiques du philosophe marxiste Guido Oldrini, Preliminari a una storia del cinema (2004) et Il Cinema nella cultura del Novecento (2006), entendaient prolonger la perspective de cette « révision critique » que Guido Aristarco avait promue dans la revue Cinema Nuovo – à laquelle Oldrini a assidûment participé. Cet article s’attache au premier d’entre eux, les Preliminari a una storia del cinema qui se voulaient un essai de méthodologie de l’historiographie devant « suggérer » des « nouveaux critères » et une « voie alternative » tant aux approches « formalistes » et « post-modernistes », qu’aux « histoires-chroniques » et à la New Film History. Le défi d’Oldrini était, d’une part, de rejeter l’arbitraire d’une herméneutique prétendant à une subjectivité métahistorique et, d’autre part, d’intégrer au travail historiographique le moment de l’évaluation esthétique pour écarter tout regard soi-disant « neutre », dépassant la pseudo-objectivité d’une historiographie descriptive. Ainsi, selon lui, seule une critique et une axiologie fondées sur les principes du matérialisme dialectique – dans la perspective de l’Esthétique de Lukács – permettraient de mettre en œuvre une historiographie susceptible de devenir une « cartographie critique », c’est-à-dire proprement « historiciste », tout en évitant tout déterminisme sociologique ou idéologique.
Miracle à Maiori, une enquête sur les lieux de Viaggio in Italia
Authors: Baldassari-Phéline Anouk 
Published: February 2025

Cet article présente les premiers résultats d’une thèse en cours qui porte sur la genèse du film de Roberto Rossellini Viaggio in Italia (Voyage en Italie), tourné à Naples et dans les environs en 1953. Les recherches de l’auteure l’ont conduite à accorder une attention particulière au village de Maiori, sur la côte amalfitaine, où se déroule la dernière scène. Elle a entrepris de documenter le tournage de ce « miracle » final en conjuguant le travail d’archives et une enquête de terrain parmi la population et les descendants des participants à cette séquence finale. Contrairement à ce qui est souvent affirmé, celle-ci ne fut en rien improvisée sur place mais bel et bien mise en scène avec les habitants du village et de villages environnants, soigneusement préparée. Il reste qu’au terme de ce parcours, le film de Rossellini apparaît comme un lieu de mémoire pour la communauté locale.
Créer des espaces de pratiques langagières hétérogènes : enjeux de la comparaison de langues dans les territoires ultramarins
Authors: Daure Mathieu , Alby Sophie 
Published: February 2025

Cette contribution s’intéresse à la comparaison de langues comme levier pour la prise en compte du plurilinguisme des élèves dans les contextes scolaires ultramarins. De nombreuses études sur les situations sociolinguistiques des territoires ultramarins mettent en avant une grande diversité linguistique et culturelle ; cependant le système éducatif s’inscrit dans une continuité territoriale d’une France une et indivisible prônant une idéologie monolingue. Dans un tel contexte, la comparaison de langues, approche s’inscrivant dans le contexte du développement de la didactique du plurilinguisme ou des approches plurielles, apparaît comme une réponse possible à l’enjeu de prise en compte des langues des élèves. Dans le domaine de la didactique du plurilinguisme, deux objectifs se dégagent : comparer les langues pour comprendre ce que les élèves produisent et comparer les langues pour faciliter la compréhension par les élèves - et les enseignant.e.s - de phénomènes grammaticaux. Il s’agit ici de questionner les fondements même d’une telle approche en montrant que la focalisation sur des publics d’élèves spécifiques peut avoir pour conséquence un détournement de son intérêt intrinsèque pour tou.te.s les enseignant.e.s et tou.te.s les élèves et toutes les langues quelles que soient leurs formes de reconnaissances symboliques ou statutaires.
À propos de l’utilisation des savoirs traditionnels en salle de classe, quelques éléments de postface
Authors: Léglise Isabelle , Rossille Adrien , Muni Toke Valelia 
Published: February 2025

Ce texte propose de premiers éléments de réflexion sur les enjeux de l’inclusion des langues et des savoirs autochtones à l’école : au-delà des difficultés liées à la contextualisation et à la transposition didactique, se posent des questions éthiques et politiques relatives au caractère patrimonial de ces savoirs, usuellement transmis de manière intergénérationnelle et socialement réglementée.
Décloisonner les pratiques langagières par la comparaison de langues en formation des enseignant.e.s et en salle de classe
Authors: Daure Mathieu , Alby Sophie 
Published: February 2025

Comme dans tous les territoires ultramarins, la Guyane se caractérise par sa grande diversité sociolinguistique et socioculturelle. Celle-ci commence à être prise en compte dans le cadre de la mise en place de dispositifs bilingues souvent expérimentaux. Cependant la formation des enseignant.e.s et l’enseignement continuent de s’inscrire dans l’idéologie monolingue qui caractérise le système éducatif français, cloisonnant l’enseignement des langues, les pratiques langagières et excluant généralement les répertoires plurilingues des enseignant.e.s et des élèves. Cette contribution s’intéresse à la comparaison de langues comme levier pour la prise en compte de leurs langues dans l’enseignement en classe dite « ordinaire » en Guyane française. Il s’agit ici de présenter les apports d’une telle approche, d’une part dans le cadre d’expérimentations de modules de formation initiale des enseignant.e.s et d’autre part à partir de données interactionnelles recueillies en salle de classe ordinaire lors de séances de comparaison de langues.
Miroslav Volf’s public theology in national healing and reconciliation in Zimbabwe
Authors: Useni Joseph C. , Dreyer Wim A. 
Published: February 2025

Several individuals use Miroslav Volf’s theology to understand the unity of systematic theology and biblical interpretation, as well as the relationship between church theology and political theology. As a result, his work is associated with politically engaged and well-known theologians such as David Tracy, Reinhold Niebuhr and Jurgen Moltmann. It would be more beneficial to interpret Miroslav Volf’s critical work as an attempt to clarify terms such as ‘common good’, ‘embracing’ and ‘justice’. In addition to examining the political and socioeconomic environment and social exclusion in Zimbabwe, this study encourages a ‘historical-theological’ critique of social justice and social injustice.Intradisciplinary and/or interdisciplinary implications: This article will provide Miroslav Volf’s public theology framework as a point of comparison and critique.
Posttraining Dry Cupping Treatment Elevates Heart Rate Variability in Taekwondo Athletes
Authors: Lu Chi-Cheng , Hung Bao-Lien , Zheng Ai-Chi , Chen Yi-Ying , Fang Shih-Hua 
Published: February 2025

Abstract
Elite taekwondo (TKD) athletes require physical strength and mastery of complex techniques to excel in a highly competitive environment. This study aimed to investigate the effects of dry cupping posttraining on heart rate variability (HRV) and recovery in TKD athletes. Fourteen male TKD athletes participated in a crossover study and were randomly assigned to either a dry cupping (Group CUP) or a placebo group without cupping (Group PLA) after completing a standardized TKD-specific training program. A 28-day washout period was implemented between the two treatments to minimize potential carryover effects. HRV and rated perceived exertion (RPE) were evaluated at three-time points: before training (Pre), immediately after training (Post), and 30 min after rest or dry cupping (Post30) in both groups. The results indicated that heart rate (HR) at Post and Post30 was significantly higher than at Pre in both groups. Low frequency (LF) and the LF/high frequency (HF) ratio at Post were significantly elevated compared to Pre in both groups. However, at Post30, these values remained significantly higher in Group PLA but not in Group CUP. HF at Post was significantly reduced compared to Pre in both groups, but at Post30, this reduction persisted only in Group PLA and not in Group CUP. Significant differences in the levels of LF, HF, and the LF/HF ratio were observed between Group PLA and Group CUP at Post30. The CUP group also showed significantly lower RPE compared to the PLA group at Post30. In conclusion, dry cupping treatment after TKD training significantly improved HRV parameters and reduced perceived fatigue, suggesting its potential as an effective method for enhancing recovery in TKD athletes.