bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stellar Cores in the Sh 2-305 H ii Region
Authors: Pandey Rakesh , Sharma Saurabh , Panwar Neelam , Dewangan Lokesh K. , Ojha Devendra K. , Bisen D. P. , Sinha Tirthendu , Ghosh Arpan , Pandey Anil K. 
Published: March 2020

Abstract
Using our deep optical and near-infrared photometry along with multiwavelength archival data, we here present a detailed study of the Galactic H ii region Sh 2-305 to understand the star/star-cluster formation. On the basis of excess infrared emission, we have identified 116 young stellar objects (YSOs) within a field of view of ∼18.′5 × 18.′5 around Sh 2-305. The average age, mass, and extinction (A

V
) for this sample of YSOs are 1.8 Myr, 2.9 M
⊙, and 7.1 mag, respectively. The density distribution of stellar sources along with minimal spanning tree calculations on the location of YSOs reveals at least three stellar subclusterings in Sh 2-305. One cluster is seen toward the center (i.e., Mayer 3), while the other two are distributed toward the north and south directions. Two massive O-type stars (VM2 and VM4; ages ∼5 Myr) are located at the center of the Sh 2-305 H ii region. The analysis of the infrared and radio maps traces the photon-dominant regions (PDRs) in Sh 2-305. The association of the younger generation of stars with the PDRs is also investigated in Sh 2-305. This result suggests that these two massive stars might have influenced the star formation history in Sh 2-305. This argument is also supported by the calculation of various pressures driven by massive stars, the slope of the mass function/K-band luminosity function, star formation efficiency, fraction of Class i sources, and mass of the dense gas toward the subclusterings in Sh 2-305.
Stronger Southward Magnetic Field and Geoeffectiveness of ICMEs Containing Prominence Materials Measured from 1998 to 2011
Authors: Li Dongni , Yao Shuo 
Published: March 2020

Abstract
Interplanetary coronal mass ejections (ICMEs) could be classified into magnetic clouds (MCs) and non-MCs according to their magnetic field signatures, and into prominence-inside ICMEs (PIs) and non-PIs based on whether they contain colder and higher helium abundance plasmas than the solar wind. It is known that the MCs often lead to magnetic storms. However, whether or not the PIs have significant geoeffectiveness is unclear. This statistical work studies the southward interplanetary magnetic field (IMF) magnitude of the PIs, and the related magnetic storms’ level. The data include the IMF and plasma moments measured by ACE and WIND, and the Dst index from 1998 to 2011. The hypothesis test based on the proportions of two groups is used to analyze 95 ICMEs related to single storms (SSs). The results show that the magnetic storms caused by the PIs mostly distribute at a strong level, while that caused by the non-PIs and by all the 95 ICMEs mostly distribute at a moderate level. The PIs have a significantly higher probability of generating SSs than the non-PIs. Moreover, the MCs containing carbon-cold and helium-enhanced materials (MC&PIs) have the highest fraction of minimum B

z
, less than −11 nT. Since the MC&PIs have large-scale magnetic flux rope and prominence material, the stronger southward IMF is probably provided by the prominence. It is in accordance with the observed injection of enhanced twisted flux ropes to prominence. Therefore, the detailed eruption and propagation processes of the three-part coronal mass ejections deserve more concern from a space weather perspective.
Simulations of Young Type Ia Supernova Remnants Undergoing Shock Acceleration in a Turbulent Medium
Authors: Peng Qiyong , Bao Biwen , Yang Chuyuan , Zhang Li 
Published: March 2020

Abstract
Two-dimensional cylindrical magnetohydrodynamic (MHD) simulations are implemented to investigate the dynamical properties of young type Ia supernova remnants (SNRs) undergoing shock acceleration in a turbulent medium. In our simulations, an MHD code is coupled with a semianalytical kinetic treatment of shock acceleration by means of a time-dependent effective adiabatic index. Large-scale density and magnetic field fluctuations are calculated and mapped into the computational domain before simulations. The above configurations allow us to study the time-dependent dynamical properties and magnetic field structure of a benchmark SNR undergoing shock acceleration in a turbulent medium, along with the relative positions of the contact discontinuity. Our simulation results reveal that there is a rippled forward shock, a thinner shocked ejecta layer and a denser, narrower intershock region. The resulting net effect is a higher density difference between the shocked ejecta and the shocked interstellar medium, leading to a growth of the Rayleigh–Taylor instability. The amplified magnetic field occurs not only at the contact discontinuity but also near the immediate downstream of the shock. The spatial location of the maximum magnetic field is in the vicinity of immediate downstream, which is different with Guo et al. Our derived profiles of the relative contact discontinuity positions are compatible with the results of two typical young type Ia SNRs: SN 1006 and Tycho, with the lowest value reaching ∼1.02 for both cases. Moreover, we find no obvious ejecta protrusions beyond the main forward shock.
Prevalence of Complex Organic Molecules in Starless and Prestellar Cores within the Taurus Molecular Cloud
Authors: Scibelli Samantha , Shirley Yancy 
Published: March 2020

Abstract
The detection of complex organic molecules (COMs) toward dense, collapsing prestellar cores has sparked interest in the fields of astrochemistry and astrobiology, yet the mechanisms for COM formation are still debated. It was originally believed that COMs first form in ices, only to be irradiated by UV radiation from the surrounding interstellar radiation field as well as forming protostars, and subsequently photodesorbed into the gas phase. However, starless and prestellar cores do not have internal protostars to heat up and sublimate the ices. Alternative models using chemical energy have been developed to explain the desorption of COMs, yet in order to test these models, robust measurements of COM abundances are needed toward representative samples of cores. We have conducted a large sample survey of 31 starless and prestellar cores in the Taurus molecular cloud, detecting methanol (CH3OH) in 100% of the cores targeted and acetaldehyde (CH3CHO) in 70%. At least two transition lines of each molecule were measured, allowing us to place tight constraints on excitation temperature, column density, and abundance. Additional mapping of methanol revealed extended emission detected down to A
V as low as ∼3 mag. We find that COMs are detectable in the gas phase and are being formed early, at least hundreds of thousands of years prior to star and planet formation. The precursor molecule, CH3OH, may be chemically linked to the more complex CH3CHO; however, higher spatial resolution maps are needed to further test chemical models.
The Chandra High-resolution X-Ray Spectrum of Quiescent Emission from Sgr A*
Authors: Corrales Lia , Baganoff F. K. , Wang Q. D. , Nowak M. , Neilsen J. , Markoff S. , Haggard D. , Davis J. , Houck J. , Principe D. 
Published: March 2020

Abstract
In quiescence, Sgr A* is surprisingly dim, shining 100,000 times less than expected for its environment. This problem has motivated a host of theoretical models to explain radiatively inefficient accretion flows. The Chandra Galactic Center X-ray Visionary Program obtained approximately 3 Ms (1 month) of Chandra high-energy transmission grating (HETG) data, offering the only opportunity to examine the quiescent X-ray emission of Sgr A* with high-resolution spectroscopy. Utilizing custom background regions and filters for removing overlapping point sources, this work provides the first-ever look at stacked HETG spectra of Sgr A*. We model the background data sets with a cubic spline and fit the unbinned Sgr A* spectra with a simple parametric model of a power law plus Gaussian lines under the effects of interstellar extinction. We detect a strong 6.7 keV iron emission line in the HEG spectra and a 3.1 keV emission line in the MEG spectra. In all cases, the line centroids and equivalent widths are consistent with those measured from low-resolution CCD spectra. An examination of the unbinned, stacked HEG ± 1 spectrum reveals fine structure in the iron line complex. In addition to resolving the resonant and forbidden lines from He-like iron, there are apparent emission features arising with higher statistical significance at lower energy, potentially associated with Fe xx–xxiv ions in a ∼1 keV plasma arising near the Bondi radius of Sgr A*. With this work, we release the cleaned and stacked Sgr A* and background HETG spectra to the public as a special legacy data set.
Solar System Objects Observed with TESS—First Data Release: Bright Main-belt and Trojan Asteroids from the Southern Survey
Authors: Pál András , Szakáts Róbert , Kiss Csaba , Bódi Attila , Bognár Zsófia , Kalup Csilla , Kiss László L. , Marton Gábor , Molnár László , Plachy Emese , Sárneczky Krisztián , Szabó Gyula M. , Szabó Róbert 
Published: March 2020

Abstract
Compared with previous space-borne surveys, the Transiting Exoplanet Survey Satellite (TESS) provides a unique and new approach to observe solar system objects. While its primary mission avoids the vicinity of the ecliptic plane by approximately six degrees, the scale height of the solar system debris disk is large enough to place various small body populations in the field of view. In this paper we present the first data release of photometric analysis of TESS observations of small solar system bodies, focusing on the bright end of the observed main-belt asteroid and Jovian Trojan populations. This data release, named TSSYS-DR1, contains 9912 light curves obtained and extracted in a homogeneous manner, and triples the number of bodies with unambiguous fundamental rotation characteristics, namely where accurate periods and amplitudes are both reported. Our catalog clearly shows that the number of bodies with long rotation periods are definitely underestimated by all previous ground-based surveys, by at least an order of magnitude.
ALMA High-frequency Long Baseline Campaign in 2017: Band-to-band Phase Referencing in Submillimeter Waves
Authors: Asaki Yoshiharu , Maud Luke T. , Fomalont Edward B. , Phillips Neil M. , Hirota Akihiko , Sawada Tsuyoshi , Barcos-Muñoz Loreto , Richards Anita M. S. , Dent William R. F. , Takahashi Satoko , Corder Stuartt , Carpenter John M. , Villard Eric , Humphreys Elizabeth M. 
Published: March 2020

Abstract
In 2017, an Atacama Large Millimeter/submillimeter Array (ALMA) high-frequency long baseline campaign was organized to test image capabilities with baselines up to 16 km at submillimeter (submm) wavelengths. We investigated image qualities using ALMA receiver Bands 7, 8, 9, and 10 (285–875 GHz) by adopting band-to-band (B2B) phase referencing in which a phase calibrator is tracked at a lower frequency. For B2B phase referencing, it is expected that a closer phase calibrator to a target can be used, comparing to standard in-band phase referencing. In the first step, it is ensured that an instrumental phase offset difference between low- and high-frequency Bands can be removed using a differential gain calibration in which a phase calibrator is certainly detected while frequency switching. In the next step, comparative experiments are arranged to investigate the image quality between B2B and in-band phase referencing with phase calibrators at various separation angles. In the final step, we conducted long baseline imaging tests for a quasar at 289 GHz in Band 7 and 405 GHz in Band 8 and complex structure sources of HL Tau and VY CMa at ∼670 GHz in Band 9. The B2B phase referencing was successfully applied, allowing us to achieve an angular resolution of 14 × 11 and 10 × 8 mas for HL Tau and VY CMa, respectively. There is a high probability of finding a low-frequency calibrator within 5.°4 in B2B phase referencing, bright enough to use an 8 s scan length combined with a 7.5 GHz bandwidth.
Calculations of Dielectronic Recombination and Electron-impact Excitation Rate Coefficients of Highly Charged Sulfur Ions
Authors: Zhang D. H. , Wu Z. W. , Ren C. , Jiang J. , Xie L. Y. , Schuch R. , Zhang J. M. , Dong C. Z. 
Published: March 2020

Abstract
Connected to the experiment performed at the Stockholm electron beam ion trap, a systematic relativistic configuration-interaction calculation is carried out to compare with the experimental spectra. In particular, separate rate coefficients are calculated for dominant recombination and excitation processes in the range of the impact electron energy determined by the experiment. By means of the relevant experimental parameters, the presently calculated dielectronic recombination rate coefficients for

and S14+ ions and electron-impact excitation ones for S15+, S14+, and S13+ ions are employed further to synthesize overall theoretical spectra for comparison with the experimentally measured spectra. Overall, very good agreements with the experimental results are found except for one missing excitation peak around the impact electron energy 2.52 keV, which cannot be explained by the present calculations and thus remains open.
New data on karyotype, spermatogenesis and ovarian trophocyte ploidy in three aquatic bug species of the families Naucoridae, Notonectidae, and Belostomatidae (Nepomorpha, Heteroptera)
Authors: Stoianova Desislava , Simov Nikolay , Quang Vu Manh , Nguyen Duc Minh , Grozeva Snejana 
Published: March 2020

We report the karyotype, some aspects of spermatogenesis, and ovarian trophocytes ploidy in three aquatic bug species:Ilyocoris cimicoides(Linnaeus, 1758),Notonecta glaucaLinnaeus, 1758, andDiplonychus rusticusFabricius, 1871 from previously unexplored regions – South Europe (Bulgaria) and Southeast Asia (Vietnam). Our results add considerable support for the published karyotype data for these species. InI. cimicoides, we observed achiasmate male meiosis – the first report of achiasmy for the family Naucoridae. More comprehensive cytogenetic studies in other species of the Naucoridae are required to elucidate the role of achiasmy as a character in the systematics of the family.Our observations on the association between phases of spermatogenesis and developmental stages inI. cimicoidesandN. glaucadiffer from the previously published data. In these species, we assume that the spermatogenesis phases are not strongly associated with certain developmental stages. For further cytogenetic studies (on the Balkan Peninsula), we recommend July as the most appropriate month for collection ofI. cimicoidesandN. glauca.In the ovaries of both species, we studied the level of ploidy in metaphase and interphase trophocytes. InI. cimicoides, diploid and tetraploid metaphase trophocytes were found. Heteropycnotic elements, observed in interphase trophocytes of this species, represented the X chromosomes. It allowed us to determine the trophocytes ploidy at interphase (2n was repeated up to 16 times). The situation withN. glaucawas different. The metaphase trophocytes were diploid and we were not able to determine the ploidy of interphase trophocytes since such conspicuous heteropycnotic elements were not found. The scarce data available suggest a tendency for a low level of trophocyte ploidy in the basal infraorders (Nepomorpha and Gerromorpha) and for a high level in the more advanced Pentatomomorpha. Data about this character in species from other infraorders are needed to confirm that tendency.
Le Père Garasse et la poétique du libelle diffamatoire : l’utilisation de Lucien, de Rabelais et de Régnier
Authors: Debailly Pascal 
Published: March 2020

Le début du xvii e siècle en France connaît une vogue sans précédent de la littérature satirique sous toutes ses formes. Sous le signe de l’agressivité burlesque, elle touche aussi la prédication et la controverse religieuses. Des polémistes mandatés par leur congrégation utilisent, ad majorem gloriam Dei , les armes de la littérature profane. Parmi eux, le jésuite François Garasse est un pamphlétaire redoutable. Il s’inspire de Lucien, de Rabelais et de Régnier et met leurs techniques d’expression profanes au service de la cause chrétienne. Il s’agit ici de montrer comment ces auteurs lui permettent de façonner sa poétique du libelle.
La Mothe Le Vayer à l’école du « gentil Lucien »
Authors: Roche Bruno 
Published: March 2020

La Mothe Le Vayer a longtemps passé pour un simple arrangeur de citations. Or celui qu’il nomme le « gentil Lucien » apparaît d’abord comme un auteur plaisant, qu’il cite souvent à loisir pour agrémenter son propos. Mais le Samosatois est aussi « gentil » au sens de païen, et il inspire au supposé compilateur qui s’est mis à son école des énoncés qui se révèlent violemment antichrétiens lorsqu’ils sont mis bout à bout. Grâce à cette appellation d’apparence anodine, il reste toujours possible au libertin érudit de chanter la palinodie : celui qui s’inspire d’un si « gentil » écrivain ne saurait produire un « méchant » livre…
Prose satirique / discours satyrique : l’intertexte de Lucien dans les dialogues français d’éducation érotique au XVII e siècle
Authors: Rosellini Michèle 
Published: March 2020

Au tournant des xvi e et xvii e siècles paraissent en France de multiples « dialogues des courtisanes ». Leur source n’est pourtant pas Lucien, mais l’Arétin qui s’est lui-même inspiré de Lucien dans ses Ragionamenti . Or, quand la traduction de Perrot d’Ablancourt rend ses œuvres disponibles aux auteurs français, le genre de l’entretien érotique fait retour vers Lucien. En témoignent les trois dialogues parus dans la seconde moitié du siècle : L’École des filles , L’Académie des dames , La Religieuse en chemise . Il est intéressant de déceler dans leurs diverses composantes (cadre, interlocutrices, sujets) les indices de l’intertexte de Lucien, et d’observer comment le discours qui s’y énonce convertit la satire lucianesque en une critique libertine de l’ordre social contemporain.
Les « États transits maritimes » du détroit de Malacca : vers la création d’un hub énergétique transfrontalier ?
Authors: Fau Nathalie 
Published: March 2020

Situé sur la route maritime reliant les zones de production pétrolière du golfe Arabo-Persique et les zones de consommation d’Asie orientale, le détroit de Malacca est le second goulet d’étranglement des flux mondiaux d’hydrocarbures après le détroit d’Ormuz. De ce fait, les États riverains du détroit de Malacca, situés sur cette route énergétique d’envergure mondiale, peuvent être qualifiés d’« États transits » : un terme désignant un pays situé sur un corridor énergétique transnational et qui exerce une fonction de lien entre des pays producteurs et des pays consommateurs. À partir d’une typologie des États transits maritimes, cette contribution analyse la stratégie de chaque État riverain pour valoriser sa situation sur un corridor énergétique et s’interroge finalement sur les possibilités d’émergence d’un hub énergétique transfrontalier dans la partie méridionale du détroit de Malacca.
Les nouvelles routes sud-est asiatiques de la foi : dynamiques missionnaires
Authors: Jammes Jérémy 
Published: March 2020

Cet article sur les prosélytismes vers/depuis l’Asie du Sud-Est se veut au cœur d’une réflexion sur un bouleversement majeur des équilibres religieux mondiaux, aux implications à la fois géopolitiques, sociologiques et économiques. Une approche comparative réfléchira sur des études de cas évangélico-pentecôtistes, islamiques et bouddhistes porteurs de programmes missionnaires en direction de l’Asie du Sud-Est depuis les années 1950. Produire une cartographie des mutations et enjeux religieux en cours en Asie du Sud-Est nécessite de conserver une définition ouverte et dynamique dudit espace, lequel est la cible de réseaux prosélytes extra- mais également intra-asiatiques, justifiant très souvent leur action par des idéaux humanitaires. Loin des stéréotypes orientalistes ou ethnocentriques, force est aussi de constater que l’Asie du Sud-Est produit depuis peu des groupes ou stratégies missionnaires porteurs d’expressions réformatrices des mêmes « grandes religions » qu’elle avait accueillies, donnant lieu à des phénomènes de missions dites « inversées » vers l’Occident. Les dynamiques religieuses s’opérant aujourd’hui seront ainsi observées de manière kaléidoscopique, c’est-à-dire comme un processus circulatoire et interactif d’acteurs et de réseaux, d’idées et de valeurs, de revendications identitaires, le tout inscrit au croisement d’influences locales, régionales et mondiales.
Transports publics sous tension à Jakarta
Authors: Desmoulière Rémi 
Published: March 2020

Cet article vise à comprendre les formes, les enjeux et les effets des conflits opposant les acteurs du transport public à Jakarta, à partir d’un travail de recherche portant sur le milieu des opérateurs de minibus, de petits véhicules de transport en commun (de 6 à 25 places) exploités par des particuliers. D’abord, un panorama historique des formes de conflits impliquant des opérateurs de minibus au cours des dernières décennies est dressé. Aux conflits internes, qui opposent principalement les chauffeurs de minibus entre eux, se sont ajoutés à partir des années 2010 des conflits externes entre les opérateurs de minibus et des modes concurrents, notamment le bus à haut niveau de service et les motos-taxis à la demande. La compréhension de ces conflits passe ensuite par une analyse de la territorialité des opérateurs de minibus qui, privés d’infrastructures qui leur soient exclusivement dédiées, s’approprient et se partagent l’espace urbain selon des logiques de lignes, d’aires de desserte et de points d’arrêt.
« Les détours sont les voies »
Authors: Coblence Françoise 
Published: March 2020

Le détour paraît caractériser aussi bien la méthode psychanalytique que le fonctionnement psychique dans son ensemble, même s’il ne se révèle qu’après coup, ou justement pour cette raison. Ce texte interroge la dialectique entre détour et retour, voie directe et indirecte, passage par l’acte et refoulement, relation entre détour dans l’espace et attente dans le temps. Le mot d’esprit, par sa concision, offre un exemple des paradoxes du détour, à la fois voie indirecte et fulgurance. Mais la clinique nous conduit aussi à réfléchir sur la nature de l’agir : voie rapide, ou avant coup pour la constitution du fantasme ou de représentation d’attente ?
La vie est un détour, l’analyse aussi
Authors: André Jacques 
Published: March 2020

La psychanalyse naît d’un double détournement : l’hypnose d’abord, la catharsis ensuite. Freud renonce à l’énergie de l’une et de l’autre. Fini d’hypnotiser, de décoincer l’affect, de masser, pincer la cuisse ou presser le front, « j’ai abandonné cette technique, écrit-il, parce qu’elle était totalement inadéquate à la structure si fine de la névrose. » En psychanalyse, le raccourci n’est pas le plus court chemin.
Casa tomada – « Maison occupée »
Authors: Votadoro Felipe 
Published: March 2020

L’auteur propose un parallèle entre la nouvelle fantastique de Julio Cortázar et un récit d’une expérience d’emprisonnement et de torture dans un état totalitaire. À partir de ces deux histoires d’occupation ou d’exil qui renvoient à la psychose en tant que trouble majeur entre le sujet et son environnement humain, il explore les rapports entre appareil psychique et « réalité », au-delà du refoulement.