bluuebunny/crossref_metadata_2025_split huggingface dataset:
GCM-motivated Multidimensional Temperature Parametrization Scheme for Phase-curve Retrieval
Authors: Dobbs-Dixon Ian , Blecic Jasmina 
Published: April 2022

Abstract
We present a novel physically motivated, parametrized temperature model for phase-curve retrieval, able to self-consistently assess the variation in thermal structure in multidimensions. To develop this approach, we drew motivation from both full three-dimensional general circulation models and analytic formulations, accounting for the dominant dynamical feature of tidally locked planets, the planetary jet. Our formulation shows notable flexibility. It can generate planetary jets of various characteristics and redistribution efficiencies seen in the literature, including both standard eastward and unusual westward offset hotspots, as well as more exotic configurations for potential future observations. In our modeling scheme we utilize a tractable set of parameters efficient enough to enable future Bayesian analysis and, in addition to the resolved temperature structure, we return physical insights not yet derived from retrievals: the amplitude and the phase offset, and the location and the extent of the equatorial jet.
Multiline Assessment of Narrow-line Regions in z ∼ 3 Radio Galaxies
Authors: Terao Koki , Nagao Tohru , Onishi Kyoko , Matsuoka Kenta , Akiyama Masayuki , Matsuoka Yoshiki , Yamashita Takuji 
Published: April 2022

Abstract
In this paper, we use high-quality rest-UV spectra of three radio galaxies at z ∼ 3 observed with the FORS2 camera on the Very Large Telescope to measure the flux of several emission lines, including relatively faint ones, such as N iv]λ1486, O iii]λ1663, and [Ne iv]λ2424. Additionally, we collect fluxes of faint rest-UV emission lines in 12 z ∼ 3 radio galaxies from the literature. Previously, physical and chemical properties of narrow-line regions (NLRs) in high-z active galactic nuclei (AGNs) have been investigated mostly by using only strong rest-UV emission lines (e.g., N v
λ1240, C iv
λ1549, He ii
λ1640, and C iii]λ1909). Such strong-line diagnostics are based on various assumptions due to the limitation in the number of available emission-line constraints. In this work, both physical and chemical properties of NLR clouds in each object are estimated by fitting detailed photoionization models to the measured emission-line fluxes. We confirm that the metallicity of NLRs in AGNs at z ∼ 3 is solar or supersolar, without assumptions about the gas density and ionization parameter thanks to the constraints from the faint emission lines. This result suggests that high-z radio galaxies are already chemically mature at z ∼ 3.
Diffuse Flux of Ultra-high-energy Photons from Cosmic-Ray Interactions in the Disk of the Galaxy and Implications for the Search for Decaying Super-heavy Dark Matter
Authors: Bérat Corinne , Bleve Carla , Deligny Olivier , Montanet François , Savina Pierpaolo , Torrès Zoé 
Published: April 2022

Abstract
An estimate of the expected photon flux above 1017 eV from the interactions of ultra-high-energy cosmic rays with the matter in the Galactic disk is presented. Uncertainties arising from the distribution of the gas in the disk, the absolute level of the cosmic-ray flux, and the composition of the cosmic rays are taken into account. Within these uncertainties, the integrated photon flux above 1017 eV is averaged out over Galactic latitude less than 5°, between ≃3.2 × 10−2 km−2 yr−1 sr−1 and ≃8.7 × 10−2 km−2 yr−1 sr−1. The all-sky average value amounts to ≃1.1 ×10−2 km−2 yr−1 sr−1 above 1017 eV and decreases roughly as E
−2, making this diffuse flux the dominant one from cosmic-ray interactions for energy thresholds between 1017 and 1018 eV. Compared to the current sensitivities of detection techniques, a gain of between two and three orders of magnitude in exposure is required for a detection below ≃1018 eV. The implications for searches for photon fluxes from the Galactic center that would be indicative of the decay of super-heavy dark matter particles are discussed, as the photon flux presented in this study can be considered as a floor below which other signals would be overwhelmed.
Merger of a Neutron Star with a Black Hole: One-family versus Two-families Scenario
Authors: Di Clemente Francesco , Drago Alessandro , Pagliara Giuseppe 
Published: April 2022

Abstract
A kilonova (KN) signal is generally expected after a black hole–neutron star merger. The strength of the signal is related to the equation of state of neutron star matter, and it increases with the stiffness of the latter. The recent results obtained by NICER from the analyses of PSR J0740+6620 suggest a rather stiff equation of state, and the expected KN signal is therefore strong, at least if the mass of the black hole does not exceed ∼10 M
⊙, the adimensional spin parameter is not too small, and the orbit is prograde. We compare the predictions obtained by considering equations of state of neutron star matter satisfying the most recent observations and assuming that only one family of compact stars exists with the results predicted in the two-families scenario. In the latter a soft hadronic equation of state produces very compact stellar objects, while a rather stiff quark matter equation of state produces massive strange quark stars, satisfying NICER results. The expected KN signal in the two-families scenario is very weak: in particular, the hadronic star–black hole merger produces a much weaker signal than in the one-family scenario because the hadronic equation of state is very soft. Moreover, according to the only existing simulation, the strange quark star–black hole merger does not produce a KN signal because the amount of mass ejected is negligible. These predictions will be easily tested with the new generation of detectors if black holes with an adimensional spin parameter χ
BH ≳ 0.2 or a mass M
BH ≲ 4 M
⊙ can be present in the merger.
Precursors of the RNA World in Space: Detection of (Z)-1,2-ethenediol in the Interstellar Medium, a Key Intermediate in Sugar Formation
Authors: Rivilla Víctor M. , Colzi Laura , Jiménez-Serra Izaskun , Martín-Pintado Jesús , Megías Andrés , Melosso Mattia , Bizzocchi Luca , López-Gallifa Álvaro , Martínez-Henares Antonio , Massalkhi Sarah , Tercero Belén , de Vicente Pablo , Guillemin Jean-Claude , García de la Concepción Juan , Rico-Villas Fernando , Zeng Shaoshan , Martín Sergio , Requena-Torres Miguel A. , Tonolo Francesca , Alessandrini Silvia , Dore Luca , Barone Vincenzo , Puzzarini Cristina 
Published: April 2022

Abstract
We present the first detection of (Z)-1,2-ethenediol, (CHOH)2, the enol form of glycolaldehyde, in the interstellar medium toward the G+0.693−0.027 molecular cloud located in the Galactic Center. We have derived a column density of (1.8 ± 0.1) × 1013 cm−2, which translates into a molecular abundance with respect to molecular hydrogen of 1.3 × 10−10. The abundance ratio between glycolaldehyde and (Z)-1,2-ethenediol is ∼5.2. We discuss several viable formation routes through chemical reactions from precursors such as HCO, H2CO, CHOH, or CH2CHOH. We also propose that this species might be an important precursor in the formation of glyceraldehyde (HOCH2CHOHCHO) in the interstellar medium through combination with the hydroxymethylene (CHOH) radical.
Hubble Space Telescope Detection of the Nucleus of Comet C/2014 UN271 (Bernardinelli–Bernstein)
Authors: Hui 許 Man-To 文韜 , Jewitt David , Yu 余 Liang-Liang 亮亮 , Mutchler Max J. 
Published: April 2022

Abstract
We present a high-resolution observation of the distant comet C/2014 UN271 (Bernardinelli–Bernstein) using the Hubble Space Telescope on 2022 January 8. The signal of the nucleus was successfully isolated by means of a nucleus extraction technique, with an apparent V-band magnitude measured to be 21.65 ± 0.11, corresponding to an absolute magnitude of 8.63 ± 0.11. The product of the visual geometric albedo with the effective radius squared is

p

V

R

n

2

=
157
±
16

km2. If the ALMA observation by Lellouch et al. refers to a bare nucleus, we derived a visual geometric albedo of 0.033 ± 0.009. If dust contamination of the ALMA signal is present at the maximum allowed level (24%), we found an albedo of 0.044 ± 0.012 for the nucleus having an effective diameter of 119 ± 15 km. In either case, we confirm that C/2014 UN271 is the largest long-period comet ever detected. Judging from the measured surface brightness profile of the coma, whose logarithmic gradient varies azimuthally between ∼1.0 and 1.7 as a consequence of solar radiation pressure, the mass production is consistent with steady-state production but not with impulsive ejection, as would be produced by an outburst. Using aperture photometry, we estimated an enormous (albeit uncertain) mass-loss rate of ∼103 kg s−1 at a heliocentric distance of ∼20 au.
First Census of Gas-phase Metallicity Gradients of Star-forming Galaxies in Overdense Environments at Cosmic Noon
Authors: Li Zihao , Wang Xin , Cai Zheng , Shi Dong Dong , Fan Xiaohui , Zheng Xian Zhong , Malkan Matthew A. , Teplitz Harry I. , Henry Alaina L. , Bian Fuyan , Colbert James 
Published: April 2022

Abstract
We report the first spatially resolved measurements of gas-phase metallicity radial gradients in star-forming galaxies in overdense environments at z ≳ 2. The spectroscopic data are acquired by the MAMMOTH-Grism survey, a Hubble Space Telescope (HST) cycle 28 medium program. This program is obtaining 45 orbits of WFC3/IR grism spectroscopy in the density peak regions of three massive galaxy protoclusters (BOSS 1244, BOSS 1542, and BOSS 1441) at z = 2–3. Our sample in the BOSS 1244 field consists of 20 galaxies with stellar mass ranging from 109.0 to 1010.3
M
⊙, star formation rate (SFR) from 10 to 240 M
⊙ yr−1, and global gas-phase metallicity (

12
+
log
(
O

/

H
)

) from 8.2 to 8.6. At 1σ confidence level, 2/20 galaxies in our sample show positive (inverted) gradients—the relative abundance of oxygen increasing with galactocentric radius, opposite the usual trend. Furthermore, 1/20 shows negative gradients, and 17/20 are consistent with flat gradients. This high fraction of flat/inverted gradients is uncommon in simulations and previous observations conducted in blank fields at similar redshifts. To understand this, we investigate the correlations among various observed properties of our sample galaxies. We find an anticorrelation between metallicity gradient and global metallicity of our galaxies residing in extreme overdensities, and a marked deficiency of metallicity in our massive galaxies as compared to their coeval field counterparts. We conclude that the cold-mode gas accretion plays an active role in shaping the chemical evolution of galaxies in the protocluster environments, diluting their central chemical abundance, and flattening/inverting their metallicity gradients.
Resolving Massive Black Hole Binary Evolution via Adaptive Particle Splitting
Authors: Franchini Alessia , Lupi Alessandro , Sesana Alberto 
Published: April 2022

Abstract
The study of the interaction of a massive black hole binary with its gaseous environment is crucial in order to be able to predict merger rates and possible electromagnetic counterparts of gravitational-wave signals. The evolution of the binary semimajor axis resulting from this interaction has been recently debated, and a clear consensus is still missing because of several numerical limitations, i.e., fixed orbit binaries or lack of resolution inside the cavity carved by the binary in its circumbinary disk. Using on-the-fly particle splitting in the 3D meshless code gizmo, we achieve hyper-Lagrangian resolution, which allows us to properly resolve the dynamics inside the cavity—in particular, for the first time, the disks that form around the two components of a live binary surrounded by a locally isothermal gaseous circumbinary disk. We show that the binary orbit decays with time for very cold and very warm disks and that the result of the interaction in the intermediate regime is strongly influenced by the disk viscosity, as this essentially regulates the fraction of mass contained in the disks around the binary components, as well as the fraction that is accreted by the binary. We find the balance between these two quantities to determine whether the binary semimajor axis decreases with time.
Discovery of Nine Super Li-rich Unevolved Stars from the LAMOST Survey
Authors: Yan T.-S. , Shi J.-R. , Wang L. , Yan H.-L. , Zhou Z.-M. , Zhou Y.-T. , Fang X.-S. , Li C.-Q. , Chen T.-Y. , Xie X.-J. 
Published: April 2022

Abstract
Based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) medium-resolution spectroscopic survey (MRS), we report the discovery of nine super Li-rich unevolved stars with A(Li) > 3.8 dex. These objects show unusually high levels of lithium abundances, up to three times higher than the meteoritic value of 3.3 dex, which indicates that they must have experienced a history of lithium enrichment. It is found that seven of our program stars are fast rotators with v sin i > 9 km s−1, which suggests that the accretion of circumstellar matter may be the main contributor to the lithium enhancement of these unevolved stars; however, other sources cannot be excluded.
Peripheral Refraction and Contrast Detection Sensitivity in Pseudophakic Patients Implanted With a New Meniscus Intraocular Lens
Authors: Villegas Eloy A. , Marín José M. , Ginis Harilaos , Robles Consuelo , Alcón Encarna , Hervella Lucia , Prieto Pedro M. , Taña-Rivero Pedro , Artal Pablo 
Published: April 2022

PURPOSE:
To evaluate peripheral refraction and contrast detection sensitivity in pseudophakic patients implanted with a new type of inverted meniscus intraocular lens (IOL) (Art25; Voptica SL) that was designed to provide better peripheral optics.

METHODS:
One month after cataract surgery, in 87 eyes implanted with the Art25 IOL, peripheral contrast detection sensitivity was measured psychophysically at 40° visual angle, both horizontally and vertically, and compared with a control group of 51 eyes implanted with standard biconvex IOLs. Thirty-one eyes with the Art25 IOL and 28 eyes from the control group were randomly selected to also measure peripheral refraction using a scanning Hartmann-Shack wavefront sensor along 80° in the horizontal meridian.

RESULTS:

Most patients achieved emmetropia and good visual acuity, and no significant adverse events were observed after cataract surgery with Art25 IOLs. Peripheral contrast detection sensitivity was significantly better (
P
< .01) in the group with the Art25 IOL in both directions (7.78 ± 3.24 vs 5.74 ± 2.60 vertical, 10.98 ± 5.09 vs 7.47 ± 3.96 horizontal), which was in agreement with the optical quality improvement in the periphery due to a reduction of defocus (1.97 and 1.21 diopters [D] at 40° temporal and nasal sides) and astigmatism (1.17 and 0.37 D at 40° temporal and nasal sides) that was statistically significant (
P
< .01) from 20° of eccentricity.

CONCLUSIONS:
Patients implanted with a new inverted meniscus IOL present a reduced amount of peripheral defocus and astigmatism compared to patients implanted with standard biconvex IOLs. This improvement in optical quality leads to better contrast detection sensitivity measured at 40° of eccentricity.

[
J Refract Surg
. 2022;38(4):229–234.]
Trifocal IOL Implantation in Eyes With Previous Laser Corneal Refractive Surgery: The Impact of Corneal Spherical Aberration on Postoperative Visual Outcomes
Authors: Cobo-Soriano Rosario , Rodríguez-Gutiérrez Beatriz , Bilbao-Calabuig Rafael , Tejerina Víctor , Fernández-Corrochano Alba , Druchkiv Vasyl , Beltrán Jaime 
Published: April 2022

PURPOSE:
To analyze corneal aberrations and factors affecting visual outcomes after implantation of a trifocal intraocular lens (IOL) in eyes previously treated with laser corneal refractive surgery.

METHODS:

This retrospective case series included 222 consecutive eyes implanted with the trifocal FineVision Micro-F IOL (PhysIOL) after laser corneal refractive surgery. The series was divided into two groups according to safety outcomes after lensectomy: eyes with loss of one or more lines of corrected distance visual acuity (CDVA) [n = 59, 26.5%]) (failed eyes group) and eyes with no loss or gain in CDVA lines (n = 163, 73.4%]) (successful eyes group). Distribution of tomographic corneal aberrations (spherical aberration [Z
4
0
], comatic and root mean square of higher order aberrations [RMS-HOA]), laser corneal refractive surgery error, kappa angle, and CDVA after laser corneal refractive surgery were compared among both groups.

RESULTS:

Mean CDVA after lensectomy was 0.15 ± 0.07 logMAR (range: 0.05 to 0.30 logMAR) versus 0.03 ± 0.04 logMAR (range: 0.00 to 0.15 logMAR) in the failed and successful eyes groups, respectively (
P
< .001). Comparison of both groups showed that failed eyes had a statistically significantly higher grade of hyperopic laser corneal refractive surgery than successful eyes measured as mean sphere (+0.71 ± 3.10 diopters [D] [range: −7.75 to +6.00 D] vs −0.46 ± 3.70 D [range: −10.75 to +6.00 D],
P
< .01), spherical equivalent (+0.27 ± 3.10 D [range: −8.00 to +5.50 D] vs −0.97 ± 3.60 D [range: −12.50 to +4.90 D],
P
< .05), and percentage of hyperopic laser corneal refractive surgery (64% vs 43.5%,
P
< .05). Corneal aberration analysis showed that mean Z
4
0
values were significantly more negative in the failed eyes group than in the successful eyes group (+0.07 ± 0.40 mm [range: −0.82 to +0.65 mm] vs +0.18 ± 0.37 mm [range: −0.79 to +0.87 mm],
P
< .05). Laser corneal refractive surgery cylinder was distributed homogeneously between both groups, as well as coma and RMS-HOA, kappa angle, and CDVA after laser corneal refractive surgery that were not statistically significant.

CONCLUSIONS:
Surgeons should consider tomographic corneal spherical aberration after implantation of a trifocal IOL in eyes after keratorefractive surgery, particularly in eyes previously treated with hyperopic laser corneal refractive surgery, to prevent loss of lines of visual acuity after lensectomy.

[
J Refract Surg
. 2022:38(4):222–228.]
The evolution of phases in FeNiCoCrCuBx high entropy alloys produced through microwave sintering and vacuum arc melting
Authors: Algan Şimşek İrem B. , Talaş Sükrü , Kurt Adem 
Published: April 2022

Microwave heating and sintering techniques are applied to various production lines and material systems to improved their microstructure and mechanical properties in comparison to conventional means of production. These techniques also consume less power and energy compared to conventional heating methods. In this study, the production of high entropy alloys (HEA) by arc melting was carried out with specimens made from compacted and sintered elemental powders; the sintering process of alloy powders prior to remelting prevents certain problems such as porosity and uneven mixing that may occur during casting. We investigated the effects of conventional and microwave sintering processes prior to remelting and casting on structure and properties of FeNiCoCrCuBx HEA. Our results show that microwave sintering changes the size and shape of phases and microstructure of the alloy by affecting the liquid-phase separation mechanism. Three-point bending strength and ductility of alloys produced by microwave sintering were superior to conventional sintering.
Quête muséographique de l’Autre. Les enjeux symboliques de pratiques touristiques à vocation « culturelle » au Sénégal
Authors: Quashie Hélène 
Published: April 2022

La promotion du « tourisme culturel » à destination du continent africain s’appuie sur de nombreuses images issues et adaptées de récits de voyages et de l’ethnologie classique. Teintées de références évolutionnistes et primitivistes, celles-ci alimentent une quête des origines et d’un « monde perdu », aujourd’hui largement répandue, accentuée, détournée, ou renforcée par ce même phénomène touristique. La destination Sénégal propose très peu de spécificités culturelles exploitables par les voyagistes ; elle s’ouvre pourtant de manière accrue aux marchés de la « découverte authentique » et de la « rencontre de l’Autre ». L’analyse de discours promotionnels, des modalités d’activités « culturelles » proposées aux voyageurs, des présupposés que ceux-ci entretiennent et des perceptions locales de l’Autre-touriste auxquelles ils se trouvent confrontés révèle les ressorts symboliques et sociaux qui garantissent et encouragent le succès de ces expériences touristiques. Elle met ainsi en exergue des représentations et pratiques sociales qui soutiennent une éthique paradoxale de la connaissance de l’Autre.
Logiques habitantes et offre résidentielle dans le processus de renouvellement urbain à Marseille
Authors: Messaoudène Maha 
Published: April 2022

A partir d’une démarche d’enquête ethno-méthodologique, cet article analyse comment le relogement et le post-relogement ont été perçus et vécus par les habitants de deux quartiers de la banlieue nord de Marseille (Bellevue et Bassens). Ces quartiers présentent des contrastes majeurs du point de vue de l’offre résidentielle. Bellevue, grand ensemble des années 1960 construit afin d’accueillir les populations pieds-noirs de retour d’Algérie, fait l’objet d’une dé-densification par démolition. De son côté, la Cité Bassens, construite afin de reloger les populations en provenance des bidonvilles, s’est vue remplacée par des habitations de type semi-individuel.
Tourisme culturel et patrimoine : quelques analyses pour un Monde habitable
Authors: Lazzarotti Olivier 
Published: April 2022

Ce texte met en perspective les mots qui définissent le tourisme culturel, à partir des textes internationaux officiels, et les pratiques touristiques qui le qualifient. Ces deux approches révèlent deux processus de production mémorielle et de sa mise en lieux. La première est celle de la nomination par les érudits et les savants qui désignent les monuments. La seconde est celle de l’élection. Les touristes, par leur présence physique dans les lieux, activent une mémoire au moment de sa transmission : le patrimoine. Dans le premier cas, les touristes dérangent ce qui existe déjà. Dans le second cas, au contraire, les touristes font le lieu et la mémoire…
La mécanique du piston. Perspectives théoriques en physique de l’ascension socio-professionnelle
Authors: Matthey Laurent , Walther Olivier 
Published: April 2022

Cet article souhaite interroger la physique de l’ascension sociale. En prenant pour analogie la course d’un piston dans un moteur à explosion, il se donne pour ambition, en premier lieu, de questionner les modalités de production et de reproduction des classes sociales dans le domaine professionnel. Littéralement, le « piston » est bien une pièce métallique dont le parcours à l’intérieur d’un cylindre permet de produire du travail mécanique à partir d’énergie thermique. Mais il est aussi, au sens figuré attesté depuis 1857, l’instrument social qui autorise la course victorieuse des individus favorisés. Aussi, de l’admission à l’échappement, les quatre temps du mouvement du piston devraient permettre de vérifier l’hypothèse selon laquelle les candidats demeurent profondément inégaux du point de vue des chances de réussite. La seconde partie de l’article est consacrée à la discussion du modèle qui sert aujourd’hui à théoriser le monde professionnel, à savoir celui du réseau. Quels sont en effet les enjeux d’un tel glissement terminologique ? N’est-il pas en lien avec une propension à opacifier les régimes de reproduction sociale en recourant à un lexique démocratique qui postule que tout le monde bénéficie de chances égales ?