bluuebunny/crossref_metadata_2025_split huggingface dataset:
Feedback by AGN Jets and Wide-angle Winds on a Galactic Scale
Authors: Dugan Zachary , Gaibler Volker , Silk Joseph 
Published: July 2017

Abstract
To investigate the differences in mechanical feedback from radio-loud and radio-quiet active galactic nuclei on the host galaxy, we perform 3D AMR hydrodynamic simulations of wide-angle, radio-quiet winds with different inclinations on a single, massive, gas-rich disk galaxy at a redshift of 2–3. We compare our results to hydrodynamic simulations of the same galaxy but with a jet. The jet has an inclination of 0° (perpendicular to the galactic plane), and the winds have inclinations of 0°, 45°, and 90°. We analyze the impact on the host’s gas, star formation, and circumgalactic medium. We find that jet feedback is energy-driven and wind feedback is momentum-driven. In all the simulations, the jet or wind creates a cavity mostly devoid of dense gas in the nuclear region where star formation is then quenched, but we find strong positive feedback in all the simulations at radii greater than 3 kpc. All four simulations have similar SFRs and stellar velocities with large radial and vertical components. However, the wind at an inclination of 90° creates the highest density regions through ram pressure and generates the highest rates of star formation due to its ongoing strong interaction with the dense gas of the galactic plane. With increased wind inclination, we find greater asymmetry in gas distribution and resulting star formation. Our model generates an expanding ring of triggered star formation with typical velocities of the order of 1/3 of the circular velocity, superimposed on the older stellar population. This should result in a potentially detectable blue asymmetry in stellar absorption features at kiloparsec scales.
Search for Exoplanets around Northern Circumpolar Stars. II. The Detection of Radial Velocity Variations in M Giant Stars HD 36384, HD 52030, and HD 208742
Authors: Lee Byeong-Cheol , Jeong Gwanghui , Park Myeong-Gu , Han Inwoo , Mkrtichian David E. , Hatzes Artie P. , Gu Shenghong , Bai Jinming , Lee Sang-Min , Oh Hyeong-Il , Kim Kang-Min 
Published: July 2017

Abstract
We present the detection of long-period RV variations in HD 36384, HD 52030, and HD 208742 by using the high-resolution, fiber-fed Bohyunsan Observatory Echelle Spectrograph (BOES) for the precise radial velocity (RV) survey of about 200 northern circumpolar stars. Analyses of RV data, chromospheric activity indicators, and bisector variations spanning about five years suggest that the RV variations are compatible with planet or brown dwarf companions in Keplerian motion. However, HD 36384 shows photometric variations with a period very close to that of RV variations as well as amplitude variations in the weighted wavelet Z-transform (WWZ) analysis, which argues that the RV variations in HD 36384 are from the stellar pulsations. Assuming that the companion hypothesis is correct, HD 52030 hosts a companion with minimum mass 13.3 M
Jup orbiting in 484 days at a distance of 1.2 au. HD 208742 hosts a companion of 14.0 M
Jup at 1.5 au with a period of 602 days. All stars are located at the asymptotic giant branch (AGB) stage on the H–R diagram after undergoing the helium flash and leaving the giant clump.With stellar radii of 53.0 R
⊙ and 57.2 R
⊙ for HD 52030 and HD 208742, respectively, these stars may be the largest yet, in terms of stellar radius, found to host substellar companions. However, given possible RV amplitude variations and the fact that these are highly evolved stars, the planet hypothesis is not yet certain.
Variability in GRMHD Simulations of Sgr
: Implications for EHT Closure Phase Observations
Authors: Medeiros Lia , Chan Chi-kwan , Özel Feryal , Psaltis Dimitrios , Kim Junhan , Marrone Daniel P. , Sa̧dowski Aleksander 
Published: July 2017

Abstract
Closure phases along different baseline triangles carry a large amount of information regarding the structures of the images of black holes in interferometric observations with the Event Horizon Telescope. We use long time span, high cadence, GRMHD+radiative transfer models of Sgr A* to investigate the expected variability of closure phases in such observations. We find that, in general, closure phases along small baseline triangles show little variability, except in the cases when one of the triangle vertices crosses one of the small regions of low visibility amplitude. The closure phase variability increases with the size of the baseline triangle, as larger baselines probe the small-scale structures of the images, which are highly variable. On average, the funnel-dominated MAD models show less closure phase variability than the disk-dominated SANE models, even in the large baseline triangles, because the images from the latter are more sensitive to the turbulence in the accretion flow. Our results suggest that image reconstruction techniques need to explicitly take into account the closure phase variability, especially if the quality and quantity of data allow for a detailed characterization of the nature of variability. This also implies that, if image reconstruction techniques that rely on the assumption of a static image are utilized, regions of the u–v space that show a high level of variability will need to be identified and excised.
Formation of Globular Clusters with Internal Abundance Spreads in r-Process Elements: Strong Evidence for Prolonged Star Formation
Authors: Bekki Kenji , Tsujimoto Takuji 
Published: July 2017

Abstract
Several globular clusters (GCs) in the Galaxy are observed to show internal abundance spreads in r-process elements (e.g., Eu). We propose a new scenario that explains the origin of these GCs (e.g., M5 and M15). In this scenario, stars with no/little abundance variations first form from a massive molecular cloud (MC). After all of the remaining gas of the MC is expelled by numerous supernovae, gas ejected from asymptotic giant branch stars can be accumulated in the central region of the GC to form a high-density intracluster medium (ICM). Merging of neutron stars then occurs to eject r-process elements, which can be efficiently trapped in and subsequently mixed with the ICM. New stars formed from the ICM can have r-process abundances that are quite different from those of earlier generations of stars within the GC. This scenario can explain both (i) why r-process elements can be trapped within GCs and (ii) why GCs with internal abundance spreads in r-process elements do not show [Fe/H] spreads. Our model shows (i) that a large fraction of Eu-rich stars can be seen in Na-enhanced stellar populations of GCs, as observed in M15, and (ii) why most of the Galactic GCs do not exhibit such internal abundance spreads. Our model demonstrates that the observed internal spreads of r-process elements in GCs provide strong evidence for prolonged star formation (∼108 yr).
A Space-based Observational Strategy for Characterizing the First Stars and Galaxies Using the Redshifted 21 cm Global Spectrum
Authors: Burns Jack O. , Bradley Richard , Tauscher Keith , Furlanetto Steven , Mirocha Jordan , Monsalve Raul , Rapetti David , Purcell William , Newell David , Draper David , MacDowall Robert , Bowman Judd , Nhan Bang , Wollack Edward J. , Fialkov Anastasia , Jones Dayton , Kasper Justin C. , Loeb Abraham , Datta Abhirup , Pritchard Jonathan , Switzer Eric , Bicay Michael 
Published: July 2017

Abstract
The redshifted 21 cm monopole is expected to be a powerful probe of the epoch of the first stars and galaxies (

). The global 21 cm signal is sensitive to the thermal and ionization state of hydrogen gas and thus provides a tracer of sources of energetic photons—primarily hot stars and accreting black holes—which ionize and heat the high redshift intergalactic medium (IGM). This paper presents a strategy for observations of the global spectrum with a realizable instrument placed in a low-altitude lunar orbit, performing night-time 40–120 MHz spectral observations, while on the farside to avoid terrestrial radio frequency interference, ionospheric corruption, and solar radio emissions. The frequency structure, uniformity over large scales, and unpolarized state of the redshifted 21 cm spectrum are distinct from the spectrally featureless, spatially varying, and polarized emission from the bright foregrounds. This allows a clean separation between the primordial signal and foregrounds. For signal extraction, we model the foreground, instrument, and 21 cm spectrum with eigenmodes calculated via Singular Value Decomposition analyses. Using a Markov Chain Monte Carlo algorithm to explore the parameter space defined by the coefficients associated with these modes, we illustrate how the spectrum can be measured and how astrophysical parameters (e.g., IGM properties, first star characteristics) can be constrained in the presence of foregrounds using the Dark Ages Radio Explorer (DARE).
Physics of Galactic Metals: Evolutionary Effects due to Production, Distribution, Feedback, and Interaction with Black Holes
Authors: Choi Ena , Ostriker Jeremiah P. , Naab Thorsten , Somerville Rachel S. , Hirschmann Michaela , Núñez Alejandro , Hu Chia-Yu , Oser Ludwig 
Published: July 2017

Abstract
We ask how the inclusion of various physical heating processes due to the metal content of gas affects the evolution of central massive galaxies and compute a suite of cosmological hydrodynamical simulations that follow these systems and their supermassive black holes. We use a smoothed particle hydrodynamics code with a pressure-entropy formulation and a more accurate treatment of the metal production, turbulent diffusion, and cooling rate based on individual element abundances. The feedback models include (1) active galactic nucleus (AGN) feedback via high-velocity broad absorption line winds and Compton/photoionization heating; (2) stellar feedback from multiple processes, including powerful winds from supernovae, stellar winds from young massive stars, and AGB stars, as well as radiative heating within Str

mgren spheres; and (3) additional heating effects due to the presence of metals, including grain photoelectric heating and metallicity-dependent X-ray heating by nearby accreting black holes and from the cosmic X-ray background. With a suite of zoom-in simulations of 30 halos with

, we show that energy and momentum budgeted from all feedback effects generate realistic galaxy properties. We explore the detailed role of each feedback model with three additional sets of simulations with varying input physics. We show that the metal-induced heating reduces the fraction of accreted stellar material but overall has a relatively minor effect on the massive central galaxies. The inclusion of AGN feedback significantly improves the ability of our simulations to yield realistic gas and stellar properties of massive galaxies with a reasonable accreted star fraction from other galaxies.
An Imperfectly Passive Nature: Bright Submillimeter Emission from Dust-obscured Star Formation in the z = 3.717 “Passive” System, ZF 20115
Authors: Simpson J. M. , Smail Ian , Wang Wei-Hao , Riechers D. , Dunlop J. S. , Ao Y. , Bourne N. , Bunker A. , Chapman S. C. , Chen Chian-Chou , Dannerbauer H. , Geach J. E. , Goto T. , Harrison C. M. , Hwang H. S. , Ivison R. J. , Kodama Tadayuki , Lee C.-H. , Lee H.-M. , Lee M. , Lim C.-F. , Michałowski M. J. , Rosario D. J. , Shim H. , Shu X. W. , Swinbank A. M. , Tee W.-L. , Toba Y. , Valiante E. , Wang Junxian , Zheng X. Z. 
Published: July 2017

Abstract
The identification of high-redshift, massive galaxies with old stellar populations may pose challenges to some models of galaxy formation. However, to securely classify a galaxy as quiescent, it is necessary to exclude significant ongoing star formation, something that can be challenging to achieve at high redshifts. In this Letter, we analyze deep ALMA/870 μm and SCUBA-2/450 μm imaging of the claimed “post-starburst” galaxy ZF 20115 at z = 3.717 that exhibits a strong Balmer break and absorption lines. The rest-frame far-infrared imaging identifies a luminous starburst 0.″4 ± 0.″1 (∼3 kpc in projection) from the position of the ultraviolet/optical emission and is consistent with lying at the redshift of ZF 20115. The star-forming component, with an obscured star formation rate of

, is undetected in the rest-frame ultraviolet but contributes significantly to the lower angular resolution photometry at rest-frame wavelengths ≳3500 Å. This contribution from the obscured starburst, especially in the Spitzer/IRAC wavebands, significantly complicates the determination of a reliable stellar mass for the ZF 20015 system, and we conclude that this source does not pose a challenge to current models of galaxy formation. The multi-wavelength observations of ZF 20115 unveil a complex system with an intricate and spatially varying star formation history. ZF 20115 demonstrates that understanding high-redshift obscured starbursts will only be possible with multi-wavelength studies that include high-resolution observations, available with the James Webb Space Telescope, at mid-infrared wavelengths.
Diagnosing the Kinematics of the Tori in Active Galactic Nuclei with the Velocity-resolved Reverberation Mapping of the Narrow Iron Kα Line
Authors: Liu 刘 Yuan 元 , Li 李小 Xiaobo 波 
Published: July 2017

Abstract
The properties of the dusty tori in active galactic nuclei (AGNs) have been investigated in detail, mainly focusing on the geometry and components; however, the kinematics of the torus are still not clear. The narrow iron Kα line at 6.4 keV is thought to be produced by the X-ray reflection from the torus. Thus, the velocity-resolved reverberation mapping of it is able to constrain the kinematics of the torus. Such effort is limited by the spectral resolution of current charged coupled device (CCD) detectors and should be possible with the microcalorimeter on the next generation X-ray satellite. In this paper, we first construct the response functions of the torus under a uniform inflow, a Keplerian rotation, and a uniform outflow. Then the energy-dependent light curve of the narrow iron Kα line is simulated according to the performance of the X-ray Integral Field Unit in Athena. Finally, the energy-dependent cross-correlation function is calculated to reveal the kinematic signal. According to our results, 100 observations with 5 ks exposure of each are sufficient to distinguish the above three velocity fields. Although the real geometry and velocity field of the torus could be more complex than we assumed, the present result proves the feasibility of the velocity-resolved reverberation mapping of the narrow iron Kα line. The combination of the dynamics of the torus with those of the broad-line region and the host galaxy is instructive for the understanding of the feeding and feedback process of AGNs.
Mesure des attitudes à l’égard de l’Unité locale pour l’inclusion scolaire
Authors: Desombre Caroline , Brasselet Célénie , Anegmar Souad , Durand-Delvigne Annick 
Published: July 2017

Cette étude vise à analyser les attitudes d’élèves de cycles 2 et 3 envers les élèves de l’ULIS-école (Unité locale pour l’inclusion scolaire – école). Pour ce faire, nous avons interrogé 156 élèves âgés de six à neuf ans. Ils devaient livrer leurs attitudes – c’est-à-dire leurs croyances, les sentiments éprouvés et leurs intentions comportementales – envers l’inclusion dans leur classe d’un élève présenté, suivant les conditions, soit comme un élève de l’ULIS de leur école soit comme un élève tout-venant d’une autre école. Nos résultats montrent que, quelle que soit la condition, les attitudes sur les dimensions cognitive, conative et affective envers les élèves de l’ULIS ne sont pas négatives et que les croyances stéréotypées ne semblent pas encore présentes à ces âges. Les résultats sont discutés au regard du dispositif de l’ULIS et de son apport pour les élèves – qu’ils soient handicapés ou non.
Approche didactique de pratiques de débat philosophique en classes d’école primaire : relèvent-elles d’une discipline scolaire ?
Authors: Berton Bettina 
Published: July 2017

La construction sociale des pratiques de débat philosophique, qui se développent en France depuis une quinzaine d’années à l’école primaire, est examinée, ici, dans une perspective didactique : ces pratiques s’enracinent-elles dans une discipline scolaire, existante ou renouvelée ou qui serait à constituer ? Relèvent-elles plutôt d’une construction non disciplinaire ? Un corpus de onze transcriptions de séances de classe, réparties sur les trois cycles, est étudié. Les résultats, obtenus à l’issue de l’examen des variations autour d’une dimension philosophique en jeu, des thèmes et des tâches identifiables en situation d’interactions langagières entre enseignants et élèves, permettent de conclure, à titre provisoire, à des constructions majoritairement non disciplinaires du genre et des contenus.
L’espoir et l’effroi. Les entreprises agricoles face au changement climatique (XVII e -XIX e siècle)
Authors: Locher Fabien , Fressoz Jean-Baptiste 
Published: July 2017

Du XVII e au XIX e siècle, les sociétés européennes ont fait de la perspective d’un changement climatique, possiblement causé par l’action humaine, un grand motif d’espoir (améliorer le climat) ou de crainte (subir sa dégradation). Cette histoire longue des réflexions et des actions motivées par la notion d’un agir climatique humain recoupe en plusieurs sens celle des entreprises, de la production et du travail. C’est notamment vrai en matière agricole. L’idée d’amélioration climatique a servi, à l’époque moderne, à promouvoir un certain modèle (agraire) de colonisation de l’Amérique du Nord, et à y attirer de la main-d’œuvre. Au XIX e siècle, les interrogations sur l’impact d’une dégradation climatique sur les cultures viticoles ont suscité la mise au point d’un outil, le diagnostic par les dates de vendanges, aujourd’hui central en climatologie historique. La création de sociétés capitalistes de « mise en valeur » et d’aménagement de la France a enfin pu, dès les décennies 1820 et 1830, être menée au nom d’objectifs explicites de restauration du climat et de la nature françaises.
Proposition d’un modèle conceptuel du traumatisme vicariant appliqué à la gestion des ressources humaines : le cas des conseillers en accompagnement vers l’emploi
Authors: Cusin Julien , Fabre Catherine 
Published: July 2017

Dans cet article, nous étudions la question de la souffrance au travail par contagion, dans le contexte particulier de l’accompagnement professionnel auprès de personnes en situation de traumatisme, qui se caractérise par un fort engagement empathique des conseillers. À cette fin, nous avons transposé, dans le champ des RH, le concept de traumatisme vicariant, issu de la littérature médicale. En définitive, nous avons construit un modèle conceptuel permettant de comprendre dans quelle mesure le conseiller souffre de sa relation avec des personnes traumatisées par un choc professionnel et peut y faire face. Ce modèle se fonde sur l’étude qualitative du cas de 23 conseillers, issus de 13 structures d’accompagnement distinctes. Plus précisément, pour l’élaborer, nous nous sommes appuyés sur la méthodologie dite ‘à la Gioia’ (Corley et Gioia, 2004 ; Gioia et al. , 2013). Une telle approche constitue en soi un apport de cette recherche, au plan méthodologique. En outre, d’un point de vue théorique, nous montrons que l’existence (ou non) d’un traumatisme vicariant dépend de trois variables (le matériel traumatique, la posture du conseiller et les barrières de protection), qui permettent d’interpréter le vécu spécifique de chaque conseiller.
Une innovation sociale dans les plis du droit
Authors: Trépos Jean-Yves 
Published: July 2017

L’article est consacré à l’effort que trois associations belges de lutte contre les violences conjugales déploient pour disséminer de nouvelles pratiques auprès d’acteurs dits « de première ligne » (magistrats, policiers, travailleurs sociaux, criminologues). On analyse ce travail social comme une innovation rendue possible par des évolutions du système judiciaire et on suit les principales étapes au travers desquelles leurs problématisations gagnent l’intérêt et la coopération de ces intervenants de première ligne. On vérifie jusqu’à quel point ils réussissent dans cette entreprise en analysant les interprétations que ces partenaires donnent de ce dispositif innovant.
Managerialism na gestão universitária: implicações do planejamento estratégico segundo a percepção de gestores de uma universidade pública
Authors: Pascuci Lucilaine , Meyer Jr. Victor , Magioni Bianca , Senna Rennan 
Published: July 2017

A transição do modelo de administração pública burocrático para um modelo gerencial mais efetivo tem exigido uma nova postura das universidades públicas. Em resposta à cobrança por resultados e ao novo cenário, mais exigente e competitivo, tem sido crescente a utilização, na gestão universitária, de abordagens gerenciais oriundas do mercado denominadas de managerialism. Todavia, tais práticas têm se mostrado inadequadas, perdendo muito de sua eficácia por desconsiderarem a complexidade organizacional de universidades, em especial, públicas. O objetivo deste estudo é analisar as contribuições e limitações do Planejamento Estratégico, na percepção dos gestores de uma universidade pública. Dados foram coletados por meio de entrevistas, observação não participante e documentos. Os resultados evidenciam um consenso por parte da gestão e das unidades acadêmicas quanto à necessidade e às contribuições da profissionalização da gestão pública. Indicam, porém, que a ambiguidade das políticas públicas e a excessiva regulamentação do governo federal aliadas à complexidade da organização acadêmica se constituem em sérios limitadores para o sucesso de práticas managerialistas como o planejamento estratégico. As conclusões revelam que a efetividade dessa abordagem gerencial requer adequação da racionalidade implícita no modelo às especificidades das organizações acadêmicas, como condição para que os esforços possam produzir os benefícios esperados.
A presença de docentes mulheres em cargos gerenciais nas universidades federais do estado de Minas Gerais
Authors: Siqueira Rafaela Fernanda Barbosa de , Miranda Adílio Renê Almeida , Ribeiro Fernanda Teixeira Franco , Cappelle Mônica Carvalho Alves 
Published: July 2017

A presença da mulher no meio produtivo é um movimento que se acentuou nas últimas décadas. Contudo, alguns estudos sobre as relações de gênero têm evidenciado que esse movimento não ocorre em todas as áreas e posições nas organizações. Assim, este estudo teve como objetivo analisar a presença de docentes mulheres em cargos gerenciais nas universidades federais do estado de Minas Gerais. Para tanto, realizou-se uma pesquisa de natureza quantitativa de caráter descritivo, na qual os dados foram coletados a partir de fontes secundárias e analisados por meio da distribuição de frequência. Foi possível identificar que, nas universidades federais pesquisadas, a maioria dos cargos gerenciais é ocupada por docentes homens, principalmente, em cargos de alto nível hierárquico. Verificou-se, também, que a ascensão na carreira das docentes ainda pode ser limitada ou direcionada, ou seja, voltada para as áreas em que elas já estão em maior número. Finalmente, pode-se dizer que a inserção de docentes mulheres em cargos gerenciais nas universidades federais de Minas Gerais ainda não ocorreu nas mesmas proporções que a inserção delas nas universidades, em cursos de pós-graduação e como docentes.