bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exploring Waveform Variations among Neutron Star Ray-tracing Codes for Complex Emission Geometries
Authors: Choudhury Devarshi , Watts Anna L. , Dittmann Alexander J. , Miller M. Coleman , Morsink Sharon M. , Salmi Tuomo , Vinciguerra Serena , Bogdanov Slavko , Guillot Sebastien , Wolff Michael T. , Arzoumanian Zaven 
Published: November 2024

Abstract
Pulse profile modeling (PPM), the technique used to infer mass, radius, and geometric parameters for rotation-powered millisecond pulsars using data from the Neutron Star Interior Composition Explorer (NICER), relies on relativistic ray-tracing of thermal X-ray photons from hot spots on the neutron star surface to the observer. To verify our ray-tracing codes we have in the past conducted cross tests for simple hot spot geometries, focusing primarily on the implementation of the spacetime model. In this paper, we present verification for test problems that explore the more complex hot spot geometries that are now being employed in the NICER PPM analyses. We conclude that the accuracy of our computed waveforms is in general sufficiently high for analyses of current NICER data sets. We have however identified some extreme configurations where extra care may be needed.
An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. II. JWST NIRCam Wide Filters
Authors: Newman Max J. B. , McQuinn Kristen B. W. , Skillman Evan D. , Boyer Martha L. , Cohen Roger E. , Dolphin Andrew E. , Telford O. Grace 
Published: November 2024

Abstract
The tip of the red giant branch (TRGB) is a standardizable candle, identifiable as the discontinuity at the bright extreme of the red giant branch (RGB) stars in color–magnitude diagram space. The TRGB-based distance method has been used to measure distances to galaxies out to D ≤ 20 Mpc with the Hubble Space Telescope F814W filter, and is an important rung in the distance ladder to measure the Hubble constant, H
0. In the infrared (IR), the TRGB apparent magnitude ranges from 1–2 mag brighter than in the optical. Now with the James Webb Space Telescope (JWST), the feasible distance range of the TRGB method can reach ∼50 Mpc. However, the IR TRGB luminosity depends to varying degrees on stellar metallicity/age. Here we standardize the TRGB luminosity using stellar colors as a proxy for metallicity/age to derive color-based corrections for the JWST Near-Infrared Camera short-wavelength filters F090W, F115W, and F150W, and the long-wavelength filters F277W, F356W, and F444W. We provide recommended filters for distance measurements depending on the requisite precision. For science requiring high precision (≤1% in distance), we recommend measuring the TRGB in F090W versus F090W − F150W or F115W versus F115W − F277W with the caveat that even with JWST, long integration times will be necessary at farther distances. If lower precision (>1.5% in distance) can be tolerated, or if shorter integration times are desirable, we recommend measuring the TRGB in either F115W or F150W. We do not recommend F444W for precision TRGB measurements due to its lower angular resolution.
Detection of QPO Soft Lag during the Outburst of Swift J1727.8-1613: Estimation of Intrinsic Parameters from Spectral Study
Authors: Debnath Dipak , Nath Sujoy Kumar , Chatterjee Debjit , Chatterjee Kaushik , Chang Hsiang-Kuang 
Published: November 2024

Abstract
The recently discovered bright transient black hole candidate Swift J1727.8-1613 is studied in a broad energy range (0.5–79 keV) using combined NICER and NuSTAR data taken on 2023 August 29. A prominent type C quasiperiodic oscillation (QPO) at 0.89 ± 0.01 Hz with its harmonic was observed in NICER data of 0.5–10 keV. Interestingly, the harmonic becomes weaker in the lower energy bands (0.5–1 and 1–3 keV). We also report the first detection of a soft time lag of 0.014 ± 0.001 s at the QPO frequency between harder (3–10 keV) and softer (0.5–3 keV) band photons observed with the NICER/X-ray timing instrument. This indicates that the inclination of the accretion disk in the binary system might be high. From the detailed spectral analysis with the relxill reflection model, we found the disk inclination angle of the source to be ∼85°. We discuss how the accretion flow configuration inferred from spectral analysis can help us understand the origin of QPOs and soft lag in this source.
Modeling the Energy-dependent Broadband Variability in the Black Hole Transient GX 339–4 Using AstroSat and NICER
Authors: Tanenia Hitesh , Garg Akash , Misra Ranjeev , Sen Somasri 
Published: November 2024

Abstract
We present a spectro-timing analysis of the black hole X-ray transient GX 339–4 using simultaneous observations from AstroSat and the Neutron Star Interior Composition Explorer (NICER) during the 2021 outburst period. The combined spectrum obtained from NICER, Large Area X-ray Proportional Counter and SXT data is effectively described by a model comprising a thermal disk component, hard Comptonization component, and reflection component with an edge. Our analysis of the AstroSat and NICER spectra indicates the source to be in a low/hard state, with a photon index of ∼1.64. The power density spectra obtained from both AstroSat and NICER observations exhibit two prominent broad features at 0.22 Hz and 2.94 Hz. We generated energy-dependent time lag and fractional root mean square (frms) at both frequencies in a broad energy range of 0.5–30 keV and found the presence of hard lags along with a decrease in variability at higher energy levels. Additionally, we discovered that the correlated variations in accretion rate, inner disk radius, coronal heating rate, and the scattering fraction, along with a delay between them, can explain the observed frms and lag spectra for both features.
He-accreting Oxygen–Neon White Dwarfs and Accretion-induced Collapse Events
Authors: Zhang Zhengyang , Wu Chengyuan , Aryan Amar , Zha Shuai , Liu Dongdong , Wang Bo 
Published: November 2024

Abstract
It has been widely accepted that mass-accreting white dwarfs (WDs) are the progenitors of Type Ia supernovae (SNe) or electron-capture supernovae. Previous work has shown that the accretion rate could affect the elemental abundance on the outer layers of CO WDs, and therefore affect the observational characteristics after they exploded as SNe Ia. However, it has not been well studied how elemental abundance changes on the outer layers of He-accreting ONe WDs as they approach the Chandrasekhar mass limit. In this paper, we investigated the evolution of He-accreting ONe WDs with MESA. We found that a CO-rich mantle will accumulate beneath the He layers resulting from the He burning, after which the ignition of the CO-rich mantle could transform carbon into silicon (Si). The amount of Si produced by carbon burning is strongly anticorrelated with the accretion rate. As the ONe WD nearly approaches the Chandrasekhar mass limit (M
ch) through accretion, it is likely to undergo accretion-induced collapse, resulting in the formation of a neutron star.
Estimating Stellar Atmospheric Parameters and [α/Fe] for LAMOST O-M-type Stars Using a Spectral Emulator
Authors: Liang Jun-Chao , Luo A-Li , Li Yin-Bi , Ma Xiao-Xiao , Li Shuo , Ma Shu-Guo , Lu Hai-Ling , Zhang Yun-Jin , Du Bing , Kong Xiao 
Published: November 2024

Abstract
In this paper, we developed a spectral emulator based on the Mapping Nearby Galaxies at Apache Point Observatory Stellar Library (MaStar) and a grouping optimization strategy to estimate effective temperature (T
eff), surface gravity (log g), metallicity ([Fe/H]), and the abundance of alpha elements with respect to iron ([α/Fe]) for O-M-type stars within the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) low-resolution spectra. The primary aim is to use a rapid spectral-fitting method, specifically the spectral emulator with the grouping optimization strategy, to create a comprehensive catalog for stars of all types within LAMOST, addressing the shortcomings in parameter estimations for both cold and hot stars present in the official LAMOST AFGKM-type catalog. This effort is part of our series of studies dedicated to establishing an empirical spectral library for LAMOST. Experimental results demonstrate that our method is effectively applicable to parameter prediction for LAMOST, with the single-machine processing time within 70 hr. We observed that the internal error dispersions for T
eff, log g, [Fe/H], and [α/Fe] across different spectral types lie within the ranges of 15–594 K, 0.03–0.27 dex, 0.02–0.10 dex, and 0.01–0.04 dex, respectively, indicating a good consistency. A comparative analysis with external data highlighted deficiencies in the official LAMOST catalog and issues with MaStar parameters, as well as potential limitations of our method in processing spectra with strong emission lines and bad pixels. The derived atmospheric parameters as a part of this work are available via doi:10.12149/101402.
Triggering the Untriggered: The First Einstein Probe-detected Gamma-Ray Burst 240219A and Its Implications
Authors: Yin Yi-Han Iris , Zhang Bin-Bin , Yang Jun , Sun Hui , Zhang Chen , Shao Yi-Xuan , Hu You-Dong , Zhu Zi-Pei , Xu Dong , An Li , Gao He , Wu Xue-Feng , Zhang Bing , Castro-Tirado Alberto Javier , Pandey Shashi B. , Rau Arne , Lei Weihua , Xie Wei , Ghirlanda Giancarlo , Piro Luigi , O’Brien Paul , Troja Eleonora , Jonker Peter , Yu Yun-Wei , An Jie , Chen Run-Chao , Chen Yi-Jing , Dong Xiao-Fei , Eyles-Ferris Rob , Fan Zhou , Fu Shao-Yu , Fynbo Johan P. U. , Gao Xing , Huang Yong-Feng , Jiang Shuai-Qing , Jiang Ya-Hui , Julakanti Yashaswi , Kuulkers Erik , Lao Qing-Hui , Li Dongyue , Ling Zhi-Xing , Liu Xing , Liu Yuan , Mou Jia-Yu , Pan Xin , Wei Daming , Wu Qinyu , Yadav Muskan , Yang Yu-Han , Yuan Weimin , Zhang Shuang-Nan 
Published: November 2024

Abstract
The Einstein Probe (EP) achieved its first detection and localization of a bright X-ray flare, EP240219a, on 2024 February 19, during its commissioning phase. Subsequent targeted searches triggered by the EP240219a alert identified a faint, untriggered gamma-ray burst (GRB) in the archived data of Fermi Gamma-ray Burst Monitor (GBM), Swift Burst Alert Telescope (BAT), and Insight-HXMT/HE. The EP Wide-field X-ray Telescope (WXT) light curve reveals a long duration of approximately 160 s with a slow decay, whereas the Fermi/GBM light curve shows a total duration of approximately 70 s. The peak in the Fermi/GBM light curve occurs slightly later with respect to the peak seen in the EP/WXT light curve. Our spectral analysis shows that a single cutoff power-law (PL) model effectively describes the joint EP/WXT–Fermi/GBM spectra in general, indicating coherent broad emission typical of GRBs. The model yielded a photon index of ∼–1.70 ± 0.05 and a peak energy of ∼257 ± 134 keV. After detection of GRB 240219A, long-term observations identified several candidates in optical and radio wavelengths, none of which was confirmed as the afterglow counterpart during subsequent optical and near-infrared follow-ups. The analysis of GRB 240219A classifies it as an X-ray-rich GRB (XRR) with a high peak energy, presenting both challenges and opportunities for studying the physical origins of X-ray flashes, XRRs, and classical GRBs. Furthermore, linking the cutoff PL component to nonthermal synchrotron radiation suggests that the burst is driven by a Poynting flux-dominated outflow.
Effects of Dust Coagulation on Streaming Instability
Authors: Ho Ka Wai , Li Hui , Li Shengtai 
Published: November 2024

Abstract
Streaming instability (SI) in dust has long been thought to be a promising process in triggering planetesimal formation in the protoplanetary disks (PPDs). In this study, we present the first numerical investigation that models the SI in the vertically stratified disk together with the dust coagulation process. Our simulations reveal that, even with the initially small dust sizes, because dust coagulation promotes dust size growth, SI can eventually still be triggered. Specifically, dust coagulation, limited only by dust fragmentation, broadens the parameter boundaries obtained from previous SI studies using single dust species. We describe the various stages of dust dynamics along with their size evolution and explore the impact of different dust fragmentation velocities. Implications of these results for realistic PPDs are also discussed.
ALMA Observations of Proper Motions of the Dust Clumps in the Protoplanetary Disk MWC 758
Authors: Kuo I-Hsuan Genevieve , Yen Hsi-Wei , Gu Pin-Gao 
Published: November 2024

Abstract
To study the dust dynamics in the dust-trapping vortices in the protoplanetary disk around MWC 758, we analyzed the 1.3 mm continuum images of the MWC 758 disk obtained with the Atacama Large Millimeter/submillimeter Array in 2017 and 2021. We detect proper motions of 22 mas and 24 mas in the two dust clumps at radii of 0.″32 and 0.″54 in the disk on the plane of the sky, respectively. On the assumption that the dust clumps are located in the disk midplane, the velocities of the observed proper motions along the azimuthal direction of the inner and outer dust clumps are sub- and super-Keplerian, respectively, and both have angular velocities corresponding to the Keplerian angular velocity at a radius of 0.″46 ± 0.″04. This deviation from the Keplerian motion is not expected in the conventional theory of vortices formed by the Rossby wave instability. The observed non-Keplerian proper motions of the dust clumps are unlikely due to the disk warp and eccentricity, nor are they associated with any predicted planets. The two dust clumps are likely spatially coincident with the infrared spirals. In addition, we detect the changes in the intensity profiles of the dust clumps over the 4 yr span. Therefore, we suggest that the observed proper motions are possibly due to changes in the density distributions in the dust clumps caused by their interaction with the spirals in the disk.
Determination of the Abundance of Mercury from the Hg ii Line at 5677.10 Å in Late B-type Stars. IX. HD 27295 (53 Tau)
Authors: Monier Richard 
Published: November 2024

Abstract
The line of Hg ii located at 5677.10 Å and the commonly used line at 3983.93 Å are not detected in UVES and ELODIE spectra of 53 Tau. The synthesis of selected lines of twenty chemical elements yields new abundance determinations for this sharp-lined star. Helium, carbon, oxygen, magnesium, aluminum, silicon, sulfur, scandium and iron are underabundant. Sodium has a solar abundance while phosphorus, calcium, titanium, chromium, manganese, strontium, ytrium, zirconium, xenon and barium are overabundant. The abundance excesses/deficiencies agree with previous determinations for aluminum, chromium, manganese, iron and strontium.
No Missing Flare in OJ 287
Authors: Valtonen Mauri J. 
Published: November 2024

Abstract
The quasar OJ 287 has shown large flares since 1888, following a pattern that arises in a supermassive black hole binary when the secondary hits the accretion disk of the primary, and releases a hot bubble of gas at every disk crossing. A complete mathematical solution of the flare sequence produced a list of future flares, the latest happening in the summer of 2022. Here I look into the origin of the idea that the lack of seeing the 2022 flare is a theoretical problem. During the summer OJ 287 cannot be observed by ground-based optical telescopes. In a paper published in 2021, ahead of the 2022 observing campaign, this was clearly stated. The often repeated claim that there is a “missing flare problem,” is a misunderstanding, as no detection was possible with the current instrumentation.
The Relationship Between Surgeon Volume and Major Surgical Complications After Total Shoulder Arthroplasty: An Evaluation of 3177 US Orthopedic Surgeons
Authors: Liu Kevin C. , Mayfield Cory K. , Richardson Mary K. , Bolia Ioanna K. , Kotlier Jacob L. , Heckmann Nathanael D. , Gamradt Seth C. , Weber Alexander E. , Liu Joseph N. , Petrigliano Frank A. 
Published: November 2024

Background
Total shoulder arthroplasty (TSA), which includes anatomic total shoulder arthroplasty (aTSA) and reverse total shoulder arthroplasty (rTSA), is a technically demanding procedure and limited data exist on the relationship between case volume and complications. We sought to identify volume thresholds for TSA, aTSA, and rTSA at which risk of a major surgical complication decreased and to compare complications of patients treated by high-volume surgeons with those of patients treated by low-volume surgeons.

Materials and Methods
Primary, elective TSAs (aTSA and rTSA) from January 1, 2016, to December 31, 2019, were identified in the Premier Healthcare Database. Multivariable logistic regression with restricted cubic splines modeled the relationship between annual TSA, aTSA, and rTSA surgeon volume and 90-day risk of major surgical complications. The 90-day complications of patients treated by high- and low-volume surgeons were compared.

Results
From 2016 to 2019, 3177 surgeons performed 78,639 TSAs. Increasing annual volume was associated with decreasing major surgical complication risk (thresholds: 50 TSAs, 25 aTSAs, and 36 rTSAs). High- and low-volume surgeons performed 24,595 and 54,044 TSAs, respectively. Patients of high-volume surgeons had lower risk of major surgical complications (adjusted odds ratio [aOR], 0.69; 95% CI, 0.56–0.84), myocardial infarction (aOR, 0.59; 95% CI, 0.36–0.97), and readmission (aOR, 0.71; 95% CI, 0.62–0.81). Importantly, 74.9% of high-volume and 93.0% of low-volume surgeon-year units had major surgical complication rates below the mean of all recorded surgeons.

Conclusion

While most high- and low-volume surgeons had major surgical complication rates below the cohort average, increasing TSA volume was associated with a decreased risk of complications. [
Orthopedics
. 2025;48(1):e15–e21.]
« War on Woke » : analyse narrative critique du storytelling des chefs conservateurs britanniques
Authors: Bonnet Alma-Pierre 
Published: November 2024

Acteur majeur lors de la crise du Brexit, le Parti conservateur britannique a renforcé la polarisation politique au sein du pays, jusqu’à alimenter ce que certains chercheurs ont décrit comme une guerre culturelle. À la veille d’élections législatives cruciales pour le parti, cet article propose d’étudier la construction discursive d’une des stratégies de communication utilisées par les Tories, appelée « War on Woke », à travers l’analyse narrative critique des discours des chefs conservateurs au congrès annuel de leur parti depuis 2016.
Na Génese do Tombo da Vila de Sesimbra
Authors: Oliveira José Augusto Cunha Freitas 
Published: November 2024

A 16 de Novembro de 1434, em Sesimbra, uma assembleia alargada da vereação autorizou a trasladação das cartas de privilégios e liberdades do concelho. O tabelião para tal escolhido comprometia‑se a verter para um livro de tombo as escrituras existentes na arca da câmara, não de todas, apenas das que fossem mais pertinentes à defesa dos interesses locais. Os critérios de escolha, que condicionaram a preservação da memória concelhia, reflectiram, necessariamente, o equilíbrio entre os diversos poderes que se cruzavam no espaço sesimbrense e que se projectavam sobre a sua administração: municipal, eclesiástico, senhorial e régio.
Hors camp, hors temps, hors champ : le refuge prolongé des Syriens au Liban
Authors: Drif Leila 
Published: November 2024

Cet article analyse le confinement humanitaire sous l’angle du refuge prolongé des réfugié·es syrien·nes, au Liban depuis 2011. Il s’agit d’examiner les mécanismes de l’immobilisation spatiale et temporelle des réfugié·es dans ce pays dit de transit, à partir de deux échelles : la première, nationale et transnationale, envisage le Liban comme une zone de mise à l’écart des réfugié·es au sein la géopolitique de l’asile. La seconde, locale et urbaine, porte sur la spatialisation du refuge hors des camps, selon le double mouvement d’absorption et d’« encampement » des réfugié·es dans les marges de la ville.
Évacuer, trier et mettre à l’abri les migrants de Paris
Authors: Christophe Maxime 
Published: November 2024

Cet article explore le dispositif qui prend en charge des hommes regroupés sous le qualificatif de « migrants », ayant vécu dans les campements urbains de la région parisienne une fois leur évacuation opérée par l’État. L’étude d’un centre d’hébergement d’urgence et de transit CAES (Centre d’accueil et d’examen des situations) met au jour le tri opéré en fonction des statuts migratoires et leur rôle déterminant dans la suite des parcours d’hébergement – ou du retour à la rue. Il permet de spécifier la façon dont une population administrativement construite est happée dans l’étau de mobilités non-choisies du fait de la menace de la suppression de l’assistance d’État. Par-là, il appréhende le statut administratif comme outil du contrôle sur une population reléguée dans l’assistance humanitaire et contrainte d’accepter ses clauses. L’article expose ainsi les modalités d’une forme de confinement migratoire : une zone grise entre l’autonomie de mouvement et l’enfermement. Emblématique de la « crise des migrants », le cas de ces hommes, pris entre la rue et les centres de transit, a infléchi les politiques d’asile en général et permet de comprendre leur trajectoire récente en France.
Similarities in B Cell Defects between Aging and Obesity
Authors: Frasca Daniela , Romero Maria , Blomberg Bonnie B 
Published: November 2024

Abstract
The aging population is increasing worldwide, and there is also an increase in the aging population living with overweight and obesity, due to changes in lifestyle and in dietary patterns that elderly individuals experience later in life. Both aging and obesity are conditions of accelerated metabolic dysfunction and dysregulated immune responses. In this review, we summarize published findings showing that obesity induces changes in humoral immunity similar to those induced by aging and that the age-associated B cell defects are mainly due to metabolic changes. We discuss the role of the obese adipose tissue in inducing dysfunctional humoral responses and autoimmune Ab secretion.
Plan–Do–Check–Act Method to Reduce Cesarean Section Deliveries at a Tertiary Hospital: A Teaching Case Study
Authors: Manjunath Usha , Deepashree M. R. 
Published: November 2024

Abstract
According to the World Health Organization (WHO), cesarean section (C-Section) rates >10–15 is not justifiable in any setting. However, the number of C-sections performed has steadily increased in both affluent and low- and middle-income nations in the past three decades. About 21% increase in the number of C-sections was observed from the National Family Health Surveys 4 to 5 in India. Studies have clearly shown a disparity in C-section rates between rural–urban, private–public health institutions, and high–low educated women. The present teaching case study details of quality improvement project using plan–do–check–act (PDCA) for reducing C-section in a tertiary care hospital. The case study highlights the implementation of PDCA cycle using team approach, capacity building, standardizing of clinical protocols, audit, and addressing nonclinical factors associated with C-section. Proven methods for path to change for improvement from the literature are used for designing of PDCA cycle. Hospitals planning to reduce elective C-section deliveries can adopt and adapt the plans and methods described in this teaching case study.