bluuebunny/crossref_metadata_2025_split huggingface dataset:
Entangled: Rapunzel syndrome with postoperative intussusception
Authors: Shahzad Zoha , Ijaz Osama , Akram Umar , Pervez Neha , Rao Asad Gul , Nashwan Abdulqadir J 
Published: October 2024

Abstract
We present a case of a 7-year-old girl with Rapunzel syndrome, a rare complication of trichobezoar, initially presenting with nonspecific symptoms. Diagnostic challenges led to delayed intervention. Surgical removal of the trichobezoar was successful, but postoperative complications included jejunojejunal intussusception, highlighting the necessity for vigilant follow-up and comprehensive psychiatric evaluation. The emergence of intussusception emphasizes the profound impact of underlying psychiatric disorders, such as trichotillomania and trichophagia, which contribute to trichobezoar formation. These conditions necessitate ongoing psychiatric management to address behavioral factors that predispose to recurrent bezoar formation and associated gastrointestinal complications. Effective follow-up strategies should encompass immediate postoperative care and long-term psychiatric support to optimize patient outcomes and minimize the risk of recurrent intussusception.
Thermosensitive multivesicular liposomal hydrogel: a potential platform for loco-regional drug delivery in the treatment of osteomyelitis caused by antibiotic-resistant biofilm-forming bacteria
Authors: Vatankhah Melody , Mahboubi Arash , Varshochian Reyhaneh , Haeri Azadeh , Houri Hamidreza , Abbasian Zahra , Dadashzadeh Simin 
Published: October 2024

Abstract
Biofilm-mediated osteomyelitis presents significant therapeutic challenges. Given the limitations of existing osteomyelitis treatment approaches, there is a distinct need to develop a localized drug delivery system that is biocompatible, biodegradable, and capable of controlled antibiotic release. Multivesicular liposomes (MVLs), characterized by their non-concentric vesicular structure, distinct composition, and enhanced stability, serve as the system for a robust sustained-release drug delivery platform. In this study, various hydrogel formulations composed of poloxamer 407 and other hydrogels, incorporating vancomycin hydrochloride (VAN HL)-loaded MVLs (VAN HL-MVLs), were prepared and evaluated. The optimized VAN HL-MVL sol-gel system, consisting of poloxamer 407 and hyaluronic acid, successfully maintained drug release for up to 3 weeks and exhibited shear-thinning behavior at 37°C. While complete drug release from MVLs alone took place in 312 h, the hydrogel formulation extended this release to 504 h. The released drug effectively inhibited the Staphylococcus aureus biofilms growth within 24 h and methicillin-resistant S. aureus biofilms within 72 h. It also eradicated preformed biofilms of S. aureus and methicillin-resistant S. aureus in 96 and 120 h, respectively. This injectable in situ gel system incorporating VAN HL-MVLs holds potential as an alternative to undergoing multiple surgeries for osteomyelitis treatment and warrants further studies.
The Type I superluminous supernova catalogue I: light-curve properties, models, and catalogue description
Authors: Gomez Sebastian , Nicholl Matt , Berger Edo , Blanchard Peter K , Villar V Ashley , Rest Sofia , Hosseinzadeh Griffin , Aamer Aysha , Ajay Yukta , Athukoralalage Wasundara , Coulter David C , Eftekhari Tarraneh , Fiore Achille , Franz Noah , Fox Ori , Gagliano Alexander , Hiramatsu Daichi , Howell D Andrew , Hsu Brian , Karmen Mitchell , Siebert Matthew R , Könyves-Tóth Réka , Kumar Harsh , McCully Curtis , Pellegrino Craig , Pierel Justin , Rest Armin , Wang Qinan 
Published: October 2024

ABSTRACT
We present the most comprehensive catalogue to date of Type I superluminous supernovae (SLSNe), a class of stripped-envelope supernovae (SNe) characterized by exceptionally high luminosities. We have compiled a sample of 262 SLSNe reported through 2022 December 31. We verified the spectroscopic classification of each SLSN and collated an exhaustive data set of ultraviolet, optical, and infrared photometry totalling over 30 000 photometric detections. Using these data, we derive observational parameters such as the peak absolute magnitudes, rise and decline time-scales, as well as bolometric luminosities, temperature, and photospheric radius evolution for all SLSNe. Additionally, we model all light curves using a hybrid model that includes contributions from both a magnetar central engine and the radioactive decay of $^{56}$Ni. We explore correlations among various physical and observational parameters, and recover the previously found relation between ejecta mass and magnetar spin, as well as the overall progenitor pre-explosion mass distribution with a peak at $\approx 6.5$ M$_\odot$. We find no significant redshift dependence for any parameter, and no evidence for distinct subtypes of SLSNe. We find that only a small fraction of SLSNe, $\lt 3$ per cent, are best fit with a significant radioactive decay component $\gtrsim 50$ per cent. We provide several analytical tools designed to simulate typical SLSN light curves across a broad range of wavelengths and phases, enabling accurate K-corrections, bolometric scaling calculations, and inclusion of SLSNe in survey simulations or future comparison works.
Gravitational lens system as a long baseline detector of extremely low frequency primordial gravitational wave
Authors: Liu Wenshuai 
Published: October 2024

ABSTRACT
The effect of extremely low frequency primordial gravitational wave with arbitrary direction of propagation on a gravitational lens system in expanding universe is investigated. From the point of view of real astrophysical lens model, singular isothermal sphere lens model is adopted in the gravitational lens system. The results show that, under the perturbation from extremely low frequency primordial gravitational wave, time delay in the gravitational lens system is very sensitive to extremely low frequency primordial gravitational wave and could strongly deviate from that deduced from theoretical model. This means that the strongly deviated time delay could be the imprint of extremely low frequency primordial gravitational wave on gravitational lens system, indicating that gravitational lens system could be used as a long baseline detector to detect extremely low frequency primordial gravitational wave.
Systematic collapse of the accretion disc across the supermassive black hole population
Authors: Hagen Scott , Done Chris , Silverman John D , Li Junyao , Liu Teng , Ren Wenke , Buchner Johannes , Merloni Andrea , Nagao Tohru , Salvato Mara 
Published: October 2024

ABSTRACT
The structure of the accretion flow on to supermassive black holes is not well understood. Standard disc models match to zeroth-order in predicting substantial energy dissipation within optically thick material producing a characteristic strong blue/ultraviolet continuum. However, they fail at reproducing more detailed comparisons to the observed spectral shapes along with their observed variability. Based on stellar mass black holes within our Galaxy, accretion discs should undergo a transition into an X-ray hot, radiatively inefficient flow, below a (mass scaled) luminosity of $\sim 0.02\, L_{\rm {Edd}}$. While this has been seen in limited samples of nearby low-luminosity active galactic nuclei (AGN) and few rare changing-look AGN, it is not at all clear whether this transition is present in the wider AGN population across cosmic time. A key issue is the difficulty in disentangling a change in spectral state from increased dust obscuration and/or host galaxy contamination, effectively drowning out the AGN emission. Here, we use the new eROSITA eFEDS Survey to identify unobscured AGN from their X-ray emission, matched to excellent optical imaging from Subaru’s Hyper Suprime-Cam; allowing the subtraction of the host galaxy contamination. The resulting, uncontaminated, AGN spectra reveal a smooth transition from a strongly disc-dominated state in bright AGN, to the collapse of the disc into an inefficient X-ray plasma in the low-luminosity AGN, with the transition occurring at $\sim 0.02\, L_{\rm {Edd}}$; revealing fundamental aspects of accretion physics in AGN.
ATOMS: ALMA three-millimetre observations of massive star-forming regions–XVII. High-mass star-formation through a large-scale collapse in IRAS 15394-5358
Authors: Das Swagat R , Merello Manuel , Bronfman Leonardo , Liu Tie , Garay Guido , Stutz Amelia , Mardones Diego , Zhou Jian-Wen , Sanhueza Patricio , Liu Hong-Li , Vázquez-Semadeni Enrique , Gómez Gilberto C , Palau Aina , Tej Anandmayee , Xu Feng-Wei , Baug Tapas , Dewangan Lokesh K , He Jinhua , Zhu Lei , Li Shanghuo , Juvela Mika , Saha Anindya , Issac Namitha , Hwang Jihye , Nazeer Hafiz , Toth L Viktor 
Published: October 2024

ABSTRACT
Hub-filament systems are considered as natural sites for high-mass star formation. Kinematic analysis of the surroundings of hub-filaments is essential to better understand high-mass star formation within such systems. In this work, we present a detailed study of the massive Galactic protocluster IRAS 15394$-$5358, using continuum and molecular line data from the ALMA three-millimetre observations of massive star-forming regions (ATOMS) survey. The 3 mm dust continuum map reveals the fragmentation of the massive ($\rm M=843~{\rm M}_{\odot }$) clump into six cores. The core C-1A is the largest (radius = 0.04 pc), the most massive ($\rm M=157~{\rm M}_{\odot }$), and lies within the dense central region, along with two smaller cores ($\rm M=7~and~3~{\rm M}_{\odot }$). The fragmentation process is consistent with the thermal Jeans fragmentation mechanism and virial analysis shows that all the cores have small virial parameter values ($\rm \alpha _{vir}\lt \lt 2$), suggesting that the cores are gravitationally bound. The mass versus radius relation indicates that three cores can potentially form at least a single massive star. The integrated intensity map of $\rm H^{13}CO^{+}$ shows that the massive clump is associated with a hub-filament system, where the central hub is linked with four filaments. A sharp velocity gradient is observed towards the hub, suggesting a global collapse where the filaments are actively feeding the hub. We discuss the role of global collapse and the possible driving mechanisms for the massive star formation activity in the protocluster.
Particle acceleration and non-thermal emission at the intrabinary shock of spider pulsars – I. Non-radiative simulations
Authors: Cortés Jorge , Sironi Lorenzo 
Published: October 2024

ABSTRACT
Spider pulsars are compact binary systems composed of a millisecond pulsar and a low-mass companion. Their X-ray emission – modulated on the orbital period – is interpreted as synchrotron radiation from high-energy electrons accelerated at the intrabinary shock. We perform global two-dimensional particle-in-cell simulations of the intrabinary shock, assuming that the shock wraps around the companion star. When the pulsar spin axis is nearly aligned with the orbital angular momentum, we find that the magnetic energy of the relativistic pulsar wind – composed of magnetic stripes of alternating field polarity – efficiently converts to particle energy at the intrabinary shock, via shock-driven reconnection. The highest energy particles accelerated by reconnection can stream ahead of the shock and be further accelerated by the upstream motional electric field. In the downstream, further energization is governed by stochastic interactions with the plasmoids/magnetic islands generated by reconnection. We also extend our earlier work by performing simulations that have a larger (and more realistic) companion size and a more strongly magnetized pulsar wind. We confirm that our first-principles synchrotron spectra and light curves are in good agreement with X-ray observations.
Chemical abundances of 20 barium stars from the OHP spectra
Authors: Yang Guochao , Zhao Jingkun , Liang Yanchun , Spite Monique , Spite Francois , Shi Jianrong , Liu Shuai , Liu Nian , Cui Wenyuan , Zhao Gang 
Published: October 2024

ABSTRACT
Based on the high resolution and high signal-to-noise spectra, we derived the chemical abundances of 20 elements for 20 barium (Ba-) stars. For the first time, the detailed abundances of four sample stars, namely HD 92482, HD 150430, HD 151101, and HD 177304 have been analysed. Additionally, Ba element abundance has been measured using high-resolution spectra for the first time in six of the other 16 sample stars. Based on the [s/Fe] ratios, the Ba-unknown star HD 115927 can be classified as a strong Ba-star, while the Ba-likely star HD 160538 can be categorized into a mild Ba-star. Consequently, our sample comprises three strong and 17 mild Ba-stars. The light odd-Z metal elements and Fe-peak elements exhibit near-solar abundances. The [$\alpha$/Fe] ratios demonstrate decreasing trends with increasing metallicity. Moreover, the abundances of neutron-capture (n-capture) elements show significant enhancements in different degrees. Using a threshold of the signed distances to the solar rapid-process (r-process) abundance pattern $d_{\rm s}$ = 0.6, we find that all of our sample stars are normal Ba-stars, indicating that the enhancements of slow-process (s-process) elements should be attributed to material transfer from their companions. We compare the observed n-capture patterns of sample stars with the FRUITY models, and estimate the mass of the Thermally-Pulsing Asymptotic Giant Branch stars that previously contaminated the Ba-stars. The models with low masses can successfully explain the observations. From a kinematic point of view, we note that most of our sample stars are linked with the thin disc, while HD 130255 may be associated with the thick disc.
Novel constraints on companions to the Helix nebula central star
Authors: Iskandarli Leyla , Farihi Jay , Lothringer Joshua D , Parsons Steven G , De Marco Orsola , Rauch Thomas 
Published: October 2024

ABSTRACT
The Helix is a visually striking and the nearest planetary nebula, yet any companions responsible for its asymmetric morphology have yet to be identified. In 2020, low-amplitude photometric variations with a periodicity of 2.8 d were reported based on Cycle 1 TESS observations. In this work, with the inclusion of two additional sectors, these periodic light curves are compared with lcurve simulations of irradiated companions in such an orbit. Based on the light-curve modelling, there are two representative solutions: (i) a Jupiter-sized body with 0.102 R$_\odot$ and an arbitrarily small orbital inclination $i=1^{\circ }$, and (ii) a 0.021 R$_\odot$ exoplanet with $i\approx 25^{\circ }$, essentially aligned with the Helix nebular inclination. Irradiated substellar companion models with equilibrium temperature 4970 K are constructed and compared with existing optical spectra and infrared photometry, where Jupiter-sized bodies can be ruled out, but companions modestly larger than Neptune are still allowed. Additionally, any spatially unresolved companions are constrained based on the multiwavelength, photometric spectral energy distribution of the central star. No ultracool dwarf companion earlier than around L5 is permitted within roughly 1200 au, leaving only faint white dwarfs and cold brown dwarfs as possible surviving architects of the nebular asymmetries. While a planetary survivor is a tantalizing possibility, it cannot be ruled out that the light-curve modulation is stellar in nature, where any substellar companion requires confirmation and may be possible with JWST observations.
Multifocal osteonecrosis due to the synergistic impact of inherited thrombophilia, autoimmunity, and pregnancy: A case report
Authors: Menon Jayakrishnan C , Parmar Nachiketa , Mandal Kausik , Yadav Prabhaker , Yadav Rajanikant , Yadav Subhash 
Published: October 2024

ABSTRACT
Multifocal osteonecrosis is a rare entity which can lead to bone fragility, fractures, and considerable morbidity. The objective of this report is to describe the presentation, evaluation, and management of a case of multifocal osteonecrosis. A 34-year-old lady presented with multiple fractures and bone pain which was exacerbated during pregnancy. She was found to have osteonecrosis involving multiple sites. Investigation revealed that she had an undefined autoimmune condition with antinuclear antibody and anti-Ro (SS-A) positivity, not fulfilling criteria for diagnosis of Sjogren syndrome. She had low Protein S (PS) levels for age and gender (confirmed on two occasions 12 weeks apart outside pregnancy). She had a novel variant in the PROS1 gene (NM_000313.4:c.1513 G &gt; A; p.Gly505Ser) which is associated with heterozygous PS deficiency. She had a good response to treatment with anticoagulation. The combination of inherited thrombophilia, autoimmunity, and the thrombophilic state induced by pregnancy probably contributed to the severe phenotype in this patient. The variant was identified in the Lamin G1 domain, which is instrumental in PS binding to tissue factor pathway inhibitor and C4-binding protein, thus playing a role in both the coagulation and complement pathway, and could explain the coexistence of autoimmunity with thrombophilia. This variant is present in 0.034% of South Asians in the gnomAD population database, and may represent an important cause of inherited thrombophilia in this group.
Insights into the North Patagonian Massif Lower Crust: Petrology and Microstructure of Granulite Xenoliths
Authors: Muckensturm Noé , Kaczmarek Mary-Alix , Grégoire Michel , Ntaflos Theodoros , Bjerg Ernesto A , Mouthereau Fréderic 
Published: October 2024

Abstract
The continental lower crust constitutes a key zone for understanding the mantle–crust magmatic and mechanical transfers, but its study is hampered by the paucity of lower crust samples. Here, we characterise the petrological, geochemical and petrophysical processes structuring the lower crust of the North Patagonian Massif (NPM; Argentina) using a suite of representative mafic granulite and websterite xenoliths. These xenoliths were entrained by alkaline lavas from five volcanic centres that erupted between the Oligocene and Pleistocene. Electron microprobe and Laser Ablation Inductively Coupled Plasma Mass Spectrometer (LA-ICPMS) were used to obtain in situ geochemical data on the minerals, while microstructural data were obtained by Electron BackScatter Diffraction (EBSD). Both granulites and websterites display a granoblastic texture and sometimes a weak inherited magmatic layering. Mafic granulite xenoliths show a plagioclase + clinopyroxene ± orthopyroxene assemblage commonly associated with spinel or titanomagnetite. Websterite xenoliths show an association of clinopyroxene + orthopyroxene + spinel, along with accessory plagioclase. Mafic granulites and websterites have SiO2 contents ranging from 44 to 53 wt %, while their Mg# varies from 53 to 79. Clinopyroxenes are characterised by weak convex upward chondrite-normalised Rare Earth Elements - REE patterns (Light-REE &lt;/&lt;&lt; Mid-REE &gt; Heavy-REE) which are similar to clinopyroxene phenocrysts and megacrysts from intra-plate basalts. Calculated liquid in equilibrium with clinopyroxene have similar REE patterns to those found in Cenozoic basalts from the NPM, suggesting that the xenolith suite represents evidence for underplating processes, possibly related to one of the magmatic events that have occurred in the NPM since the Permo-Trias. Mafic granulites and websterites show a weak mineral shape preferred orientation and an associated weak Crystal Preferred Orientation (CPO) related to the magmatic layering. Recorded plastic deformation is associated with the activation of both (100)[001] and (001)[100] slip systems in clinopyroxene, (100)[001] in orthopyroxene and (010)[001] in plagioclase. However, the activation of slip systems is generally not correlated with CPO in granulites, suggesting that the lower crust underwent subsolidus equilibration and weak plastic deformation in an inactive tectonic context, thereby preserving an inherited magmatic layering. Two-pyroxene (Fe–Mg) thermometer and pseudosection calculations define P–T conditions of the main paragenesis at 760°C to 1120°C and 7.2 to 10.3 kbar, which allows to define the Cenozoic geotherm of the NPM crust at 30°C/km and to reconsider the petrologic Moho depth at ca. 40 km.
Halogen Cycling at the Slab-Mantle Interface: Constraints from Metabasites from SW Tianshan, China
Authors: Pan Zheng-Hua , Chen Ren-Xu , Chen Tie-Nan , Yin Zhuang-Zhuang , Gong Bing , Zha Xiang-Ping , He Tao 
Published: October 2024

Abstract
Halogens play important roles in fluid activity and mass transfer in subduction zones. A systematic study of whole-rock and mineral F and Cl concentrations was carried out for a series of blueschists, high-pressure (HP) eclogites and ultrahigh-pressure (UHP) eclogites from the Chinese southwestern Tianshan. The whole-rock and mineral element compositions, phase equilibrium modeling and apatite U–Pb dating and element data were combined. The results are used to constrain halogen storage and transport in the subducting oceanic crust. The fluorine contents decrease from the blueschists to the UHP eclogites, whereas the Cl contents increase from the blueschists and HP eclogites to the UHP eclogites. Combined with the halogen compositions of their possible protoliths, it is inferred that most of the Cl was lost, whereas F was retained during subduction of the oceanic crust to the blueschist facies. Minerals in the UHP eclogites exhibit elevated Cr and Co contents and Ba/Th ratios, indicating that the infiltration of serpentinite-derived fluids resulted in Cl enrichment in the UHP eclogites. Reconstruction of whole-rock F and Cl contents from mineral models and halogen concentrations indicates continuous F and Cl loss from the subducting oceanic crust during prograde metamorphism from the blueschist to the UHP eclogite facies. The F loss from the subducting oceanic crust is consistent with the decreases in F contents in glaucophane, phengite and apatite. Apatite hosts 70% to 77% of the F in the rock and thus is the main F-host mineral in the subducting oceanic crust. Due to the different behaviors of F and Cl, the fluids released from the subducting oceanic crust had low F/Cl ratios before the blueschist facies but high F/Cl ratios during prograde metamorphism from the blueschist- to the UHP eclogite-facies. The UHP eclogites metasomatized by serpentinite-derived fluids exhibit significantly higher Cl contents and comparable F contents relative to the UHP serpentinites. This difference suggests that halogen-enriched UHP eclogites are important carriers of volatiles at subarc depths and beyond. Changes in the halogen composition of the subducting oceanic crust and the halogen flux between different lithologies in the subduction channel significantly affect element solubility in metamorphic fluids and thus mass transfer from the subducting slab to the overlying mantle wedge.