Biomédecine, une science majeure parmi les autres

Marcello Malpighi (1628-1694) Marcelli Malpighii [...] Opera omnia, seu Thesaurus locupletissimus botanico-medico-anatomicus, viginti quatuor tractatus complectens et in duos tomos distributus [...] Lugduni Batavorum : apud Petrum vander Aa, 1687 R17A0016 Apanage d’une époque révolue, Marcello Malpighi, né en Italie au début du xviie siècle, fut tout à la fois médecin, biologiste, anatomiste et botaniste. Le « comment » l’intéresse plus que le « pourquoi » et, en véritable précurseur, Malpigh..

Balade patrimoniale en médecine, pharmacie et sciences biomédicales

Le lecteur est invité à une balade patrimoniale à la découverte d'ouvrages anciens et précieux couvrant les domaines de la médecine, de la pharmacie et des sciences biomédicales. Parmi ces trésors, on peut pointer une édition grecque de 1538 d'Hippocrate, un ouvrage d’exception en couleurs de 1549 de Dioscoride, deux atlas d’anatomie à feuillets mobiles, de très beaux ouvrages de botanique médicale, etc. Grâce à une iconographie variée et grâce aux commentaires rédigés pour la plupart par des membres de la Faculté de Médecine, le lecteur pourra notamment se rendre compte des progrès considérables qui ont été réalisés dans divers secteurs de la santé. Un beau livre richement illustré, pour toute personne désireuse de s’informer sur la médecine d’autrefois. Ce catalogue, complément à l’exposition Quand la médecine rencontre son patrimoine (18 novembre 2017 - 31 janvier 2018) est le fruit d’une collaboration entre la Bibliothèque Universitaire Moretus Plantin (BUMP) et la Faculté de Médecine de l’Université de Namur

Sphere: Complete laboratory performance and prediction for on-sky first light

Item does not contain fulltextTechniques and Instrumentation for Detection of Exoplanets VI, San Diego, California, United States | August 25, 201

Discovery of a brown dwarf companion to the star HIP 64892

International audienceWe report the discovery of a bright, brown dwarf companion to the star HIP 64892, imaged with VLT/SPHERE during the SHINE exoplanet survey. The host is a B9.5V member of the Lower-Centaurus-Crux subgroup of the Scorpius Centaurus OB association. The measured angular separation of the companion (1.2705 ± 0.0023”) corresponds to a projected distance of 159 ± 12 AU. We observed the target with the dual-band imaging and long-slit spectroscopy modes of the IRDIS imager to obtain its spectral energy distribution (SED) and astrometry. In addition, we reprocessed archival NACO L-band data, from which we also recover the companion. Its SED is consistent with a young (<30 Myr), low surface gravity object with a spectral type of M9γ ± 1. From comparison with the BT-Settl atmospheric models we estimate an effective temperature of Teff = 2600 ± 100 K, and comparison of the companion photometry to the COND evolutionary models yields a mass of ~29−37 MJ at the estimated age of 16−7+15 Myr for the system. The star HIP 64892 is a rare example of an extreme-mass ratio system (q ~ 0.01) and will be useful for testing models relating to the formation and evolution of such low-mass objects

Post-conjunction detection of β Pictoris b with VLT/SPHERE

accepted by A&AInternational audienceContext. With an orbital distance comparable to that of Saturn in the solar system, β Pictoris b is the closest (semi-major axis ≃9 au) exoplanet that has been imaged to orbit a star. Thus it offers unique opportunities for detailed studies of its orbital, physical, and atmospheric properties, and of disk-planet interactions. With the exception of the discovery observations in 2003 with NaCo at the Very Large Telescope (VLT), all following astrometric measurements relative to β Pictoris have been obtained in the southwestern part of the orbit, which severely limits the determination of the planet’s orbital parameters.Aims. We aimed at further constraining β Pictoris b orbital properties using more data, and, in particular, data taken in the northeastern part of the orbit.Methods. We used SPHERE at the VLT to precisely monitor the orbital motion of beta β Pictoris b since first light of the instrument in 2014.Results. We were able to monitor the planet until November 2016, when its angular separation became too small (125 mas, i.e., 1.6 au) and prevented further detection. We redetected β Pictoris b on the northeast side of the disk at a separation of 139 mas and a PA of 30° in September 2018. The planetary orbit is now well constrained. With a semi-major axis (sma) of a = 9.0 ± 0.5 au (1σ), it definitely excludes previously reported possible long orbital periods, and excludes β Pictoris b as the origin of photometric variations that took place in 1981. We also refine the eccentricity and inclination of the planet. From an instrumental point of view, these data demonstrate that it is possible to detect, if they exist, young massive Jupiters that orbit at less than 2 au from a star that is 20 pc away