bluuebunny/crossref_metadata_2025_split huggingface dataset:
Relative evolution of eclipsing binaries: A tool for measuring globular cluster ages and He abundances
Authors: Cristi-Cambiaso N. , Catelan M. , Valcarce A. A. R. , Papageorgiou A. 
Published: September 2024

Context. Globular clusters (GCs) are among the oldest objects in the Universe for which an age can be directly measured; they thus play an important cosmological role. This age depends sensitively on the He abundance, however, which cannot be reliably measured from spectroscopy in GC stars. Detached eclipsing binaries (DEBs) near the turnoff (TO) point may play an important role in this regard.
Aims. The aim of this study is to explore the possibility that, by working with differential measurements of stars that comprise a TO binary system and by assuming the two stars have the same age and He abundance, one can achieve tighter, more robust, and less model-dependent constraints on the ages and He abundances than otherwise possible by working with the absolute parameters of the stars.
Methods. We compared both the absolute and differential parameters of the stars in V69, a TO DEB pair in the GC 47 Tuc, with two different sets of stellar evolutionary tracks, making use of a Monte Carlo technique to estimate the GC’s He abundance and age, along with their uncertainties.
Results. We find that the relative approach can produce age and He abundance estimates that are in good agreement with those from the literature. We show that our estimates are also less model-dependent, less sensitive to [Fe/H], and more robust to inherent model systematics than those obtained with an absolute approach. On the other hand, the relative analysis results in larger statistical uncertainties than its absolute counterpart, at least in the case of V69, where the two stars have very similar properties. For binary pairs in which one of the components is less evolved than the other, the statistical uncertainty can be reduced.
Conclusions. Our results suggest that the method proposed in this work can be used to robustly constrain the He abundance and ages of GCs.
Investigating the asymmetry of young stellar outflows: Combined MUSE-X-shooter study of the Th 28 jet
Authors: Murphy A. , Whelan E. T. , Bacciotti F. , Coffey D. , Comerón F. , Eislöffel J. , Nisini B. , Antoniucci S. , Alcalá J. M. , Ray T. P. 
Published: September 2024

Context. Characterising stellar jet asymmetries is key to setting robust constraints on jet launching models and improving our understanding of the underlying mechanisms behind jet launching.
Aims. We aim to characterise the asymmetric properties of the bipolar jet coming from the Classical T Tauri Star Th 28.
Methods. We combined data from integral field spectroscopy with VLT/MUSE and high-resolution spectra from VLT/X-shooter to map the optical emission line ratios in both jet lobes. We carried out a diagnostic analysis of these ratios to compare the density, electron temperature, and ionisation fraction within both lobes. The mass accretion rate was derived from the emission lines at the source and compared with the mass outflow rate derived for both lobes, using the estimated densities and measured [O I]λ6300 and [S II]λ6731 luminosities.
Results. The blue-shifted jet exhibits a significantly higher electron temperature and moderately higher ionisation fraction than the red-shifted jet. In contrast to previous studies, we also estimated higher densities, denoted as nH , in the blue-shifted jet by a factor of ~2. These asymmetries are traced to within 1″ (160 au) of the source in the line ratio maps. We find Ṁacc = 2.4 × 10−7 M⊙ yr−1, with an estimated obscuration factor of ~54 due to grey scattering around the star. Estimated values of Ṁout range between 0.66 and 13.7 × 10−9 M⊙ yr−1 in the blue-shifted jet and 5–9 × 10−9 M⊙ yr−1 in the red-shifted jet.
Conclusions. The emission line maps and diagnostic results suggest that the jet asymmetries originate close to the source and are likely to be intrinsic to the jet. Furthermore, the combined dataset offers access to a broad array of accretion tracers. In turn, this enables a more accurate estimation of the mass accretion rate, revealing a value of Ṁacc that is higher by a factor >350 than would otherwise be determined.
XUV irradiation of young planetary atmospheres. Results from a joint XMM-Newton and HST observation of HIP67522
Authors: Maggio A. , Pillitteri I. , Argiroffi C. , Locci D. , Benatti S. , Micela G. 
Published: September 2024

Context. The evaporation and the chemistry of the atmospheres of warm and hot planets are strongly determined by the high-energy irradiation they receive from their parent stars. This is more crucial among young extra-solar systems because of the high activity of stars at early ages. In particular, the extreme-ultraviolet (EUV) part of the stellar spectrum drives significant processes of photochemical interaction, but it is not directly measurable because of strong interstellar absorption and a lack of sufficiently sensitive instrumentation. An alternative approach is to derive synthetic spectra from the analysis of far-ultraviolet (FUV) and X-ray emission lines, which allow us to estimate the missed flux in the EUV band.
Aims. We performed joint and simultaneous spectroscopy of HIP 67522 with XMM-Newton and the Hubble Space Telescope in order to reconstruct the full high-energy spectrum of this 17 Myr-old solar-type (G0) star, which is the youngest transiting multiplanet system known to date.
Methods. We performed a time-resolved spectral analysis of the observations, including quiescent emission and flaring variability. We then derived the emission measure distribution (EMD) versus temperature of the chromospheric and coronal plasma from the high-resolution spectra obtained in X-rays with RGS and in FUV with COS.
Results. We derived broad-band X-ray and EUV luminosities from the synthetic spectrum based on the EMD, which allowed us to test alternative EUV versus X-ray scaling laws available in the literature. We also employed the total X–EUV flux received by the inner planet of the system to estimate its instantaneous atmospheric mass-loss rate.
Conclusions. We confirm that HIP 67522 is a very active star with a hot corona, reaching plasma temperatures above 20 MK even in quiescent state. Its EUV/X-ray flux ratio falls in between the predictions of the two scaling laws we tested, indicating an important spread in the stellar properties, which requires further investigation.
An ‘alien’ called the Oosterhoff dichotomy?
Authors: Luongo E. , Ripepi V. , Marconi M. , Prudil Z. , Rejkuba M. , Clementini G. , Longo G. 
Published: September 2024

Aims. In this Letter we investigate the origin of the Oosterhoff dichotomy in light of recent discoveries related to several ancient merging events of external galaxies with the Milky Way (MW). In particular, we aim to clarify if the subdivision in terms of the Oosterhoff type between Galactic globular clusters (GGCs) and field RR Lyrae (RRLs) can be traced back to one or more ancient galaxies that merged with the MW in its past.
Methods. We first explored the association of GGCs with the past merging events according to different literature studies. Subsequently, we compiled the positions, proper motions, and radial velocities of 10 138 field RRL variables from Gaia Data Release 3. To infer the distances, we adopted the MG–[Fe/H] relation, with [Fe/H] values estimated via empirical relationships involving individual periods and Fourier parameters. We then calculated the orbits and the integrals of motion using the Python library Galpy for the whole sample. By comparing the location of the field RRLs in the energy–angular momentum diagram with that of the GGCs, we determined their likely origin. Finally, using GaiaG-band light curves, we determined the Oosterhoff types of our RRL stars based on their location in the Bailey diagram.
Results. The analysis of the Bailey diagrams for Galactic RRL stars and GGCs associated with an ‘in situ’ versus ‘accreted’ halo origin shows remarkable differences. The in situ sample shows a wide range of metallicities with a continuous distribution and no sign of the Oosterhoff dichotomy. Conversely, the accreted RRLs clearly show the Oosterhoff dichotomy and a significantly smaller dispersion in metallicity.
Conclusions. Our results suggest that the Oosterhoff dichotomy was imported into the MW by the merging events that shaped the Galaxy.
Importance de la communication avec le propriétaire d’un animal diabétique
Authors: Morand Mathilde , Canonne-Guibert Morgane 
Published: September 2024

Une communication de qualité entre un praticien et un propriétaire est la clé d’une bonne éducation et, par-là, de la réussite de la prise en charge des maladies chroniques comme le diabète sucré. Les outils écrits de cette communication sont multiples et sont très valorisés par les propriétaires d’animaux. L’utilisation d’un support écrit permet de garantir la pérennité de l’information, mais aussi de rassurer le propriétaire. Faire de ce dernier l’acteur de la santé de son animal est la preuve de la volonté d’établir un réel partenariat entre propriétaire et praticien.La demande précédemment évoquée des propriétaires d’obtenir des sources écrites et fiables concernant la santé animale concerne aujourd’hui davantage les supports éducatifs numériques. Les formats numériques permettent l’accès à un volume important d’information, la possibilité de mises à jour fréquentes et un potentiel pour des formats interactifs. L’information médicale à destination des propriétaires d’animaux atteints de diabète est encore aujourd’hui majoritairement constituée de contenu purement éducatif mis à disposition par les cliniques vétérinaires, les centres hospitaliers ou les assurances santé.L’émergence d’outils numériques mettant à disposition du contenu éducatif et des outils utiles au suivi de la maladie est récente. La mise à disposition de ces outils doit néanmoins être le résultat d’une élaboration réfléchie afin de répondre à la demande des propriétaires tout en assurant la mise à disposition d’une information médicale la plus actualisée possible. Pour cela, des guides de recommandations existent.
Exploring the incidence of dysplasia or adenocarcinoma in early onset Barrett’s esophagus
Authors: Noordzij Irma C. , Huysentruyt Clément J. , Curvers Wouter L. , van Lijnschoten Gesina , Masclee Ad A. M. , Schoon Erik J. 
Published: September 2024

Abstract
Background Currently data on the risk of progression to and lifetime risk of cancer are not available for patients with young onset Barrett’s esophagus (BE). Our aim was to obtain epidemiologic data on the incidence of dysplasia or adenocarcinoma in young onset BE in the Netherlands by collecting data on all histologically confirmed cases over a prolonged period of 25 years between January 1, 1991 and December 31, 2015.
Methods Data were obtained from the Dutch National Pathology Registry. Patients were included if there was a suspicion of BE visualized in the esophagus during the endoscopic examination in combination with a concordant histologic diagnosis of intestinal metaplasia.
Results 231 patients with early onset BE were identified (median age 26 years [range 0–29 years]), with 17 progressing to dysplasia (6 prevalent and 11 incident). For the patients with incident dysplasia, the median surveillance time between the diagnosis of early onset BE and diagnosis of dysplasia was 5 years (range 0–16 years). The incidence rate of dysplasia was 7.3 per 1000 person-years. There were three patients who developed adenocarcinoma (1 prevalent and 2 incident), who were diagnosed at ages 28, 35, and 36 years. The incidence rate of adenocarcinoma was 1.3 per 1000 person-years.
Conclusions In this 25-year period, 231 patients were diagnosed with early onset BE in the Netherlands, with 17 patients progressing to dysplasia and three developing adenocarcinoma. This corresponded to incidence rates of 7.3 per 1000 person-years for dysplasia and 1.3 per 1000 person-years for adenocarcinoma.
Pressure-Induced Structural Transition and Enhanced Photoelectric Properties of Tm2S3
Authors: Shen 申 Zhi-Wei 志伟 , Wu 邬 Zhong-Yan 中炎 , Wang 王 Shao-Jie 绍杰 , Wang 王 He-Chong 贺冲 , Li 李 Hong-Kai 宏凯 , Song 宋 Jing 静 , Gao 高 Guo-Ying 国英 , Wang 王 Lin 霖 , Tian 田 Yong-Jun 永君 
Published: September 2024

Abstract
Rare earth sesquisulfides have drawn growing attention in photoelectric applications because of their excellent electronic and photoelectric properties upon compression. We investigate the structural, electrical, and photoelectric properties of Tm2S3 under high pressure through electrical impedance, UV-vis absorption, Raman spectroscopy, x-ray diffraction, and photoelectric measurements. It is found that δ-Tm2S3 transforms into high-pressure α-phase around 5 GPa, accompanied by a substantial reduction in atomic distance, bandgap, and resistivity. Consequently, the photocurrent density and responsivity of Tm2S3 exhibit dramatic increase behavior, achieving five orders of magnitude enhancement in α-phase compared with the initial δ-Tm2S3. Moreover, α-phase maintains a high photocurrent responsivity of three orders of magnitude after unloading. This work demonstrates significant enhancement of the photoelectric properties of Tm2S3 by applying pressure, which paves the way for improving the performance of future photoelectric devices.
A framework for curriculum transformation in quantum information science and technology education
Authors: Goorney Simon , Bley Jonas , Heusler Stefan , Sherson Jacob 
Published: September 2024

Abstract
The field of Quantum Information Science and Technology (QIST) is booming. Due to this, many new educational courses and university programs are needed in order to prepare a workforce for the developing industry. Owing to its specialist nature, teaching approaches in this field can easily become disconnected from the substantial degree of science education research which aims to support the best approaches to teaching in Science, Technology, Engineering and Mathematics fields. In order to connect these two communities with a pragmatic and repeatable methodology, we have synthesised this educational research into a decision-tree based theoretical model for the transformation of QIST curricula, intended to provide a didactical perspective for practitioners. The Quantum Curriculum Transformation Framework consists of four steps: (1) choose a topic, (2) choose one or more targeted skills, (3) choose a learning goal and (4) choose a teaching approach that achieves this goal. We show how this can be done using an example curriculum and more specifically quantum teleportation as a basic concept of quantum communication within this curriculum. By approaching curriculum creation and transformation in this way, educational goals and outcomes are more clearly defined which is in the interest of the individual and the industry alike. The framework is intended to structure the narrative of QIST teaching, and with future testing and refinement it will form a basis for further research in the didactics of QIST.
Nodes and energy flow in the transverse oscillations of resonantly end-driven stretched strings with viscous damping
Authors: Repetto C E , Roatta A , Welti R 
Published: September 2024

Abstract
Most of the works that analyze the forced oscillations of strings assume that, although they can support a tension T, they are perfectly elastic/flexible entities that do not have losses. In this work we will show that the incorporation of losses, even maintaining the analysis in a linear regime, allows us to clarify some details of the behavior that is observed in the forced oscillations of a real string. By introducing a dissipative force into the analysis, it is possible to predict not only the resonance frequencies but also how the oscillation amplitudes depend on the strength of the driving force. We can also analyze the variation of the amplitude of the antinodes when the excitation frequency approaches the resonance frequency. This amplitude variation has a behavior very similar to that of the resonance amplitude of a spring-mass oscillator. It is generally recognized that the nodes of a string, in forced oscillation, are not points of absolute rest because the energy of vibration must be transmitted through these points. However, it is difficult to find works that analyze the peculiar properties of this small movement. In this work we calculate the amplitudes of the nodes and deduce the peculiar properties of their movement. We also calculate the time averaged energy that flows along the string, from its excitation point to its fixed end.
Time-resolved Auger–Meitner spectroscopy of the photodissociation dynamics of CS2
Authors: Thompson Henry J , Plekan Oksana , Bonanomi Matteo , Pal Nitish , Allum Felix , Brynes Alexander D , Coreno Marcello , Coriani Sonia , Danailov Miltcho B , Decleva Piero , Demidovich Alexander , Devetta Michele , Faccialà Davide , Feifel Raimund , Forbes Ruaridh , Grazioli Cesare , Holland David M P , Piseri Paolo , Prince Kevin C , Rolles Daniel , Schuurman Michael S , Simoncig Alberto , Squibb Richard J , Tenorio Bruno N C , Vozzi Caterina , Zangrando Marco , Callegari Carlo , Minns Russell S , Di Fraia Michele 
Published: September 2024

Abstract
The photodissociation dynamics of UV excited CS2 are investigated using time-resolved Auger–Meitner (AM) spectroscopy. AM decay is initiated by inner-shell ionisation with a femtosecond duration x-ray (179.9 eV) probe generated by the FERMI free electron laser. The time-delayed x-ray probe removes an electron from the S(2p) orbital leading to secondary emission of a high energy electron through AM decay. We monitor the electron kinetic energy of the AM emission as a function of pump-probe delay and observe time-dependent changes in the spectrum that correlate with the formation of bound, excited-state CS2 molecules at early times, and CS + S fragments on the picosecond timescale. The results are analysed based on a simplified kinetic scheme that provides a time constant for dissociation of approximately 1.2 ps, in agreement with previous time-resolved x-ray photoelectron spectroscopy measurements (Gabalski, et al 2023 J. Phys. Chem. Lett. 14 7126–7133).
The influence of resonant light pulses on high harmonic generation in solids
Authors: Shao Tian-Jiao , Hu Fang , Zhang Qiu-Lan , Zou Huan-Qing , Yang Ai-Guo 
Published: September 2024

Abstract
We have theoretically studied high harmonic generation (HHG) in solids driven simultaneously by a mid-infrared (MIR) laser and a high-order harmonic pulse with energy around the band gap between the valence band and conduction band. By adding this resonant harmonic light pulse with the relative intensity ratio of 4%, the high-order harmonic emission from the crystal is enhanced by 1–2 orders of magnitude. The yield of HHG in solid increases monotonically with the relative strength of the resonant harmonic pulses. In addition, we also found that HHG dynamics from the k channel around the boundary of the Brillouin zone can be selectively enhanced by adjusting the frequency of the resonant high-order harmonic pulse. The resonance-enhanced HHG and k channel selection effect in solids is also investigated by using the three-band semi-conductor Bloch equation for HHG in ZnO. We also find that the harmonic in the plateau region driven by adding a resonant light field to the strong MIR driving field has less red-shifted compared with the case driven by the MIR driving field alone.
Relativistic coupled-cluster calculations for the molecular properties of AlX+ (X: F, Cl, Br, I, At and Ts) ions
Authors: Thakur Ankush , Bala Renu , Nataraj H S , Prasannaa V S 
Published: September 2024

Abstract
In this article, the molecular permanent electric dipole moments and components of static dipole polarizabilities for the electronic ground state of singly charged aluminum monohalides are reported. The coupled-cluster method by considering single and double excitations (CCSD) together with relativistic Dyall basis sets have been used to carry out these molecular property calculations. The contribution from triple excitations are incorporated through perturbative triples (CCSD(T)). The results from a series of progressively larger basis sets are extrapolated to the complete basis set limit. Further, the role of correlation and relativistic effects, and also the effect of augmentation over the considered basis sets on the valence molecular properties are studied. Our results are compared with those available in the literature.
Effect of AFM ordering on thermoelectric responses of Mg3X2 (X: C, Si, Ge) monolayers : a DFT insight
Authors: Basak Krishnanshu , Ghosal Supriya , Nath Subhadip , Jana Susmita , Jana Debnarayan 
Published: September 2024

Abstract
Two-dimensional materials have gained a lot of attention in the last few decades due to their potential applications in thermoelectric and nano-electronic devices. This study systematically presents the mechanical, electronic and thermoelectric characteristics of two-dimensional honeycomb-kagome

Mg

3

X

2

(

X

:

C

,

Si

,

Ge

) structures in the framework of density functional theory computations and by solving semiclassical Boltzmann transport equation. The geometrical stability of these structures is validated by phonon spectrum and molecular dynamics simulations. Following the elastic constants, we have inferred that all the systems are mechanically stable and brittle in nature. Lower values of Debye temperature of all structures suggest that

Mg

3

X

2

monolayers should have lower values of lattice thermal conductivity compared to graphene. Electronic structure calculations indicate that these materials are semimetallic in their nonmagnetic phase. All the structures display remarkably low lattice thermal conductivity (0.9-1.5 W (mK)−1) due to a large scattering factor and higher anharmonicity. The presence of sharp density of states peaks close to the Fermi level, arising from nearly flat and dispersionless band in the antiferromagnetic (AFM) arrangement, is poised to enhance the Seebeck coefficient, thereby potentially boosting the thermoelectric performance. The estimated values of thermoelectric figure of merit (ZT) are around 0.78 and 0.67 for

Mg

3

Si

2

and

Mg

3

Ge

2

structure respectively in AFM phase at T = 700 K. These outcomes of our findings suggest that

Mg

3

X

2

monolayers exhibit substantial promise for thermoelectric device application.
Coincidence detection probability of

(
γ
,
2
e
)

photoemission measurement
Authors: Su Yuehua , Cao Kun , Zhang Chao 
Published: September 2024

Abstract
In the study of strongly correlated electrons, one of the challenging core tasks is to develop the potential techniques for direct detection of the many-body correlations of strongly correlated electrons. The

(
γ
,
2
e
)

photoemission technique has been developed to investigate the two-body correlations of the target correlated electrons. In this article, we will focus on this technique for the correlated electrons near the Fermi energy in condensed matter. The coincidence detection probability of the two emitted electrons in the

(
γ
,
2
e
)

photoemission measurement is shown to be relevant to a two-body Bethe–Salpeter wave function, which describes the dynamical two-body correlations of the target correlated electrons near the Fermi energy. As the coincidence detection probability involves an electron–electron interaction matrix element, the arbitrary momentum and/or energy transfer due to this electron–electron interaction makes the

(
γ
,
2
e
)

photoemission technique fail to reveal the inner-pair structures of the two-body Bethe–Salpeter wave function. However, the center-of-mass momentum and energy of the two-body Bethe–Salpeter wave function can be distinctly resolved. Thus, the

(
γ
,
2
e
)

photoemission technique can provide the center-of-mass physics of the two-body correlations of the target correlated electrons. It will be one potential technique to study the center-of-mass physics of the Cooper pairs in superconductor.