Search results for "STELLA"
showing 10 items of 1995 documents
Résistance aux inhibiteurs de l'ALS: gare aux dicots ! Après le coquelicot et les matricaires, la stellaire fait de la résistance
2012
SPE GEAPSI
Note preliminari sul rinvenimento di un'area artigianale da Contrada Amone e sulla produzione ceramica nel bacino idrografico del fiume Nocella
2019
Questo articolo esamina le evidenza archeologiche di età romana nella Piana di Partinico, un'area ad Est del Golfo di Castellammare ricca di insediamenti rurali e ville tra cui quella famosa di Sirignano. L'area di contrada Amone, già nota per la presenza di un impianto termale e la scoperta di lacerti di mosaici policromi, si arricchisce adesso di una nuova area artigianale. La scoperta di alcuni scarti di tegole ha fornito l'opportunità per riflettere sulla possibile origine delle tegole bollate ONASOY, di cui si accetta tradizionalmente la provenienza dalla baia di San Cataldo. Viene dunque presentato un esame preliminare degli impasti ceramici provenienti da contrada Amone e baia San Ca…
Le regard dans la Mostellaria de Plaute
2014
Au premier abord, la thématique de la vue et du regard évoque davantage les mythes thébains, ou le Cycle épique et les tragédies qui s’en inspirent, que la comédie : ce sont Œdipe et Tirésias, Penthée et Actéon, qui furent punis d’avoir vu ce qu’ils n’auraient pas dû voir. Je visitai récemment une exposition sur Shakespeare au British Museum : un reliquaire contenant l’œil d’un Jésuite exécuté en 1606, qui y était présenté pour son lien politique avec Macbeth, me fit davantage penser au Roi L...
‘Oft turning others' leaves' : la contrainte de l' imitatio dans les sonnets anglais des XVIe et XVIIe siècles
2009
In the sixteenth and the seventeenth centuries, imitation was not usually considered a constraint by poets. Yet Sir Philip Sidney, in his sonnet cycle Astrophil and Stella, seems to advocate a new form of poetic writing based on personal experience and originality, even if he uses the traditional device of impossible love imitated from Petrarchan sonneteers. Stella appears as a new constraint, and her absence and coldness trigger a reflection on the impossibility to write.
« Interstellar Overdrive » de Pink Floyd et le processus de création à travers le prisme de l’improvisation collective : du chaos à l’ordre ?
2019
International audience
Pre-main-sequence stars older than 8 Myr in the Eagle nebula
2013
The enigmatic young brown dwarf binary FU Tau: accretion and activity
2010
FU Tau belongs to a rare class of young, wide brown dwarf binaries. We have resolved the system in a Chandra X-ray observation and detected only the primary, FU Tau A. Hard X-ray emission, presumably from a corona, is present but, unexpectedly, we detect also a strong and unusually soft component from FU Tau A. Its X-ray properties, so far unique among brown dwarfs, are very similar to those of the T Tauri star TW Hya. The analogy with TW Hya suggests that the dominating soft X-ray component can be explained by emission from accretion shocks. However, the typical free-fall velocities of a brown dwarf are too low for an interpretation of the observed X-ray temperature as post-shock region. O…
The magnetosphere of the close accreting PMS binary V4046 Sgr
2013
V4046 Sagittarii AB is a close short-period classical T Tauri binary. It is a circularised and synchronised system accreting from a circumbinary disk. In 2009 it was observed as part of a coordinated program involving near-simultaneous spectropolarimetric observations with ESPaDOnS at the Canada-France-Hawai'i Telescope and high-resolution X-ray observations with XMM-Newton. Magnetic maps of each star were derived from Zeeman-Doppler imaging. After briefly highlighting the most significant observational findings, we present a preliminary 3D model of the binary magnetosphere constructed from the magnetic maps using a newly developed binary magnetic field extrapolation code. The large-scale f…
Mass accretion to young stars triggered by flaring activity in circumstellar discs
2011
Young low-mass stars are characterized by ejection of collimated outflows and by circumstellar discs which they interact with through accretion of mass. The accretion builds up the star to its final mass and is also believed to power the mass outflows, which may in turn remove the excess angular momentum from the star-disc system. However, although the process of mass accretion is a critical aspect of star formation, some of its mechanisms are still to be fully understood. A point not considered to date and relevant for the accretion process is the evidence of very energetic and frequent flaring events in these stars. Flares may easily perturb the stability of the discs, thus influencing th…
Multitemporal Unmixing of Medium-Spatial-Resolution Satellite Images: A Case Study Using MERIS Images for Land-Cover Mapping
2011
Data from current medium-spatial-resolution imaging spectroradiometers are used for land-cover mapping and land-cover change detection at regional to global scales. However, few landscapes are homogeneous at these scales, and this creates the so-called mixed-pixel problem. In this context, this study explores the use of the linear spectral mixture model to extract subpixel land-cover composition from medium-spatial-resolution data. In particular, a time series of MEdium Resolution Imaging Spectrometer (MERIS) full-resolution (FR; pixel size of 300 m) images acquired over The Netherlands is used to illustrate this study. The Netherlands was selected because of the following: 1) the fragmenta…