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Manuel de syriaque. Deuxième édition revue et corrigée avec la collaboration de Simon Brelaud et de Jean Pflieger
No full textInternational audienceClassical Syriac (a Semitic language derived from the Aramaic of Edessa) has seen a resurgence of interest in recent years. However a teaching aid suitable for a French-speaking university audience was lacking. The present textbook is the fruit of university teaching between 2015 and 2024 and of consultation with French researchers and teacher-researchers specialising in Classical Syriac (in particular G. Bohas and M. Farina) to promote a renewed grammatical and phonetic approach to this language. Made for beginners, the method aims to introduce readers to the reading and writing of the three main classical Syriac scripts. Numerous exercises, twelve grammar lessons accompanied by audio recordings and, at the end of the handbook, two long extracts of texts (one in serṭo from the Western Syriac tradition, the other in Eastern Syriac) provide sufficient grammatical and lexical knowledge to begin reading a Syriac text independently.L’étude du syriaque classique (langue sémitique dérivée de l’araméen d’Édesse) a connu ces dernières années un regain d’intérêt. Il manquait un outil pédagogique adapté au public universitaire francophone. Le présent manuel est le fruit d’un enseignement universitaire dispensé entre 2015 et 2024 et d’une concertation avec des chercheurs et enseignant-chercheurs français spécialistes du syriaque classique (notamment G. Bohas et M. Farina) pour valoriser une approche grammaticale et phonétique renouvelée de cette langue. Adressée aux débutants, la méthode vise à initier à la lecture et à la graphie des trois grandes écritures syriaques classiques. De nombreux exercices, douze leçons de grammaire accompagnées d’enregistrements audio et, en fi n de manuel, deux longs extraits de textes (l’un en serṭo relevant de la tradition syriaque occidentale, l’autre en syriaque oriental) permettent d’acquérir un bagage grammatical et lexical suffisant pour commencer à lire de manière autonome un texte syriaque
Vins, huiles et parfums. Voyage archéologique autour de la Méditerranée
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The beauty and the splendor of the truth: interviews on autobiographical recollections
No full textTraduction en anglais par les auteurs de : « Le Beau et la splendeur du vrai. Entretiens avec François L’Yvonnet » de Jean-Pierre Changeux, Odile Jacob-Albin Michel, « Itinéraires du savoir », 2023International audienceThis book of interviews traces the intellectual odyssey of an extraordinary scholar, Jean-Pierre Changeux, illuminating both his triumphs and trials. A pioneer in the development of a groundbreaking discipline—neuroscience—his work aims to unravel the complexity of the human brain by integrating its multiple levels of organization, from molecular foundations to mental life and consciousness. As early as 1983, with the publication of his book The Neuronal Man, Changeux captivated a wide audience by shedding light on how the human brain functions. His reflections also extend to the humanities and social sciences, as he explores how our cerebral equipment is crucial to the genesis of ethical rules and the understanding of art and its creatio
« Récapitulation et synthèse des données archéologiques issues de la fouille de Nora »
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AGN feeding along a one-armed spiral in NGC 4593: A study using ALMA CO(2–1) observations
No full textInternational audienceContext. We investigate active galactic nuclei (AGN) feeding through the molecular gas (CO(2‑1) emission) properties of the local Seyfert 1 galaxy NGC 4593, using Atacama Large Millimeter Array (ALMA) observations and other multi-wavelength data. Aims. Our study aims to understand the interplay between the AGN and the interstellar medium (ISM) in this galaxy, examining the role of the AGN in steering gas dynamics within its host galaxy, evaluating the energy injected into the ISM, and determining whether gas is inflowing or outflowing from the galaxy. Methods. After reducing the ALMA CO(2‑1) images, we employed two models, 3D-BAROLO and DISCFIT, to construct a disc model and fit its emission to the ALMA data. Additionally, we used photometric data to build a spectral energy distribution (SED) and apply the CIGALE code to derive key physical properties of the AGN and its host. Results. Our analysis reveals a complex interplay within NGC 4593, including a clear rotational pattern, the influence of a non-axisymmetric bar potential, and a central molecular zone (CMZ)-like ring. We observe an outflow of CO(2‑1) gas along the minor axis, at a distance of ∼220 pc from the nucleus. The total molecular gas mass is estimated to be 1 ‑ 5 × 108 M⊙, with non-circular motions contributing 10%. Our SED analysis indicates an AGN fraction of 0.88 and a star formation rate (SFR) of 0.42 M⊙ yr‑1. Conclusions. These findings highlight the complex dynamics in the centre of NGC 4593, which are significantly influenced by the presence of the AGN. The overall physical properties of this system suggest that the AGN has a substantial impact on the evolution of NGC 4593
Chinese Coins from Kota Cina
No full textInternational audienceA total of 999 coins (or fragments), all identified as Chinese cash coins, were uncovered during the 2011–2016 excavations at Kota Cina. They are of various denominations (1, 2 and 10 wen). Fifty-nine percent of them have been identified - the rest are illegible. Those identified were issued between the sixth and thirteenth centuries CE, the majority (87%) cast during the Northern Song Dynasty (960–1127). The dynastic distribution of Chinese coins in this corpus is similar to results obtained from a surface finds collection undertaken at this site in the 1970s, and to the corpus of the Nanhai I wreck. However, there is a peculiarity in the composition of coin-types found at Kota Cina, precisely a notably higher proportion of Yuan You tongbao coins than is normally found in mainland China, which may suggest a strong influx of Chinese coins in the region during the reign of the Emperor Zhezong (1086–1100)
The disc origin of the Milky Way bulge: The high velocity dispersion of metal-rich stars at low latitudes
No full textInternational audiencePrevious studies of the chemo-kinematic properties of stars in the Galactic bulge have revealed a puzzling trend. Along the bulge minor axis, and close to the Galactic plane, metal-rich stars display a higher line-of-sight velocity dispersion compared to metal-poor stars, while at higher latitudes metal-rich stars have lower velocity dispersions than metal-poor stars, similar to what is found in the Galactic disc. In this work, we re-examine this issue, by studying the dependence of line-of-sight velocity dispersions on metallicity and latitude in APOGEE Data Release 17, confirming the results of previous works. We then analyse an N-body simulation of a Milky Way-like galaxy, also taking into account observational biases introduced by the APOGEE selection function. We show that the inversion in the line-of-sight velocity dispersion-latitude relation observed in the Galactic bulge - where the velocity dispersion of metal-rich stars becomes greater than that of metal-poor stars as latitude decreases – can be reproduced by our model. We show that this inversion is a natural consequence of a scenario in which the bulge is a boxy or peanut-shaped structure, whose metal-rich and metal-poor stars mainly originate from the thin and thick disc of the Milky Way, respectively. Due to their cold kinematics, metal-rich, thin disc stars are efficiently trapped in the boxy, peanut-shaped bulge, and at low latitudes show a strong barred morphology, which – given the bar orientation with respect to the Sun-Galactic centre direction – results in high velocity dispersions that are larger than those attained by the metal-poor populations. Extremely metal-rich stars in the Galactic bulge, which have received renewed attention in the literature, do follow the same trends as those of the metal-rich populations. The line-of-sight velocity-latitude relation observed in the Galactic bulge for metal-poor and metal-rich stars are thus both an effect of the intrinsic nature of the Galactic bulge (i.e. mostly secular) and of the angle at which we observe it from the Sun
SN 1885A and Supernova Remnants in the Centre of M31 with LOFAR
No full textInternational audienceWe present the first LOFAR image of the center of M31 at a frequency of 150 MHz. We clearly detect three supernova remnants, which, along with archival VLA data at 3 GHz and other published radio and X-ray data, allows us to characterize them in detail. Our observations also allow us to obtain upper limits of the historical SN 1885A, which is undetected even at a low frequency of 150 MHz. From analytical modeling, we find that SN 1885A will stay in its free-expansion phase for at least another couple of centuries. We find an upper limit of n H 0.04 cm -3 for the interstellar medium of SN 1885A, and that the SN ejecta density is not shallower than ∝r -9 (on average). From the 2.6σ tentative detection in X-ray, our analysis shows that nonthermal emission is expected to dominate the SN 1885A emission. Comparing our results with those on G1.9+0.3, we find that it is likely that the asymmetries in G1.9+0.3 make it a more efficient radio and X-ray emitter than SN 1885A. For Braun 80, 95, and 101, the other remnants in this region, we estimate ages of 5200, 8100, and 13,100 yr, and shock speeds of 1150, 880, and 660 km s -1 , respectively. Based on this, the supernova rate in the central 0.5 kpc × 0.6 kpc of M31 is at least one per ∼3000 yr. We estimate radio spectral indices of -0.66 ± 0.05, -0.37 ± 0.03, and -0.50 ± 0.03 for the remnants, respectively, which match fairly well with previous studies.</div
