Jacques Boulesteix - Academia.edu (original) (raw)

Papers by Jacques Boulesteix

The American Journal of Tropical Medicine and Hygiene, 1991

Five cases of encephalitis following treatment with diethylcarbamazine (DEC) were observed in Con... more Five cases of encephalitis following treatment with diethylcarbamazine (DEC) were observed in Congolese patients with Loa loa filariasis. Two cases had a fatal outcome and one resulted in severe sequelae. The notable fact was that this complication occurred in three patients hospitalized before treatment began, with whom particularly strict therapeutic precautions were taken, i.e., initial dose less than 10 mg of DEC, very gradual dose increases, and associated anti-allergic treatment. This type of drug-induced complication may not be that uncommon in highly endemic regions. It occurs primarily, but not exclusively, in subjects presenting with a high microfilarial load. The relationship between the occurrence of encephalitis and the decrease in microfilaremia is evident. The pathophysiological mechanisms are discussed in the light of these observations and the few other comments on this subject published in the literature.

Astronomy and Astrophysics Supplement Series, 1999

Observations of six luminous blue compact galaxies (BCGs) and two star forming companion galaxies... more Observations of six luminous blue compact galaxies (BCGs) and two star forming companion galaxies were carried out with the CIGALE scanning Fabry-Perot interferometer attached to the ESO 3.6 m telescope on La Silla. The observations were made in the Hα emission line which is prominent in BCGs. A velocity sampling of 5 km s −1 and a pixel size of 0.9 arcseconds were used. In this paper we present the observations and the data together with the velocity fields and the derived rotation curves. In addition we provide rough estimates of the total dynamical mass and of the ionised gas mass for each galaxy. All galaxies display rotation, but while the companion galaxies have regular velocity fields, those of the BCGs are complex and appear perturbed. This is the most extensive study to date of the optical velocity fields of BCGs. The interpretation of these results will be presented in a forthcoming paper (Paper II).

The NASA Applied Sciences Program Energy Management Program Element establishes partnerships with... more The NASA Applied Sciences Program Energy Management Program Element establishes partnerships with federal and private organizations to improve their decisions and assessments that impact the energy sector. These improvements are enabled by leveraging the knowledge generated from research resulting from spacecraft observations and model predictions conducted by NASA and providing these as inputs to the decision support and scenario assessment tools used by partner organizations. The Energy Management Program element focuses its efforts to provide for improved decisions and assessments for the following primary areas:, (1) Renewable energy & Energy efficiency, (2) Impacts of climate change on the energy sector, (3) Long-term energy modeling and forecasting, and (4) Supply and load forecasting/Distributed energy. The goals of the Program Element seek to maintain alignment and contribute to national and international priorities, specifically the Climate Change Science and Technology Pro...

We study optical and X-ray properties of the ultraluminous IRAS galaxy 10026+4347. This galaxy is... more We study optical and X-ray properties of the ultraluminous IRAS galaxy 10026+4347. This galaxy is a narrow-line QSO with very strong FeII emission. Three optical spectra were taken over two years. The full widths at half maximum (FWHMs) of the emission lines are constant whereas the third spectrum seems to show a continuum change. Intermediate-band photometry also shows a small (0.1 mag) but significant decrease in flux. HST WFPC2 images suggest that this object is a post-merger galaxy. The source is X-ray luminous (LX ≈ 10 erg s) with a very soft X-ray spectrum (photon index ≈ 3.2). The X-ray luminosity exhibits variabilities of a factor of ∼ 8 over four years and a factor of two within two days. During these X-ray flux changes, the X-ray spectral shapes are consistent with no variation. All the optical and X-ray properties resemble those of narrow-line Seyfert 1 galaxies (NLS1), except that the FWHM of Hβ is about 2500 km s, larger than that for most NLS1s. We discuss the implicat...

We present observations of the nearby barred starburst galaxy, M 83 (NGC 5236), with the new Fabr... more We present observations of the nearby barred starburst galaxy, M 83 (NGC 5236), with the new Fabry-Perot interferometer GHαFaS mounted on the 4.2 meter William Herschel Telescope on La Palma. The unprecedented high resolution observations, of 16 pc/FWHM, of the Hα-emitting gas cover the central two kpc of the galaxy. The velocity field displays the dominant disk rotation with signatures of gas inflow from kpc scales down to the nuclear regions. At the inner Inner Lindblad Resonance radius of the main bar and centerd at the dynamical center of the main galaxy disk, a nuclear 5.5(±0.9) × 10 8 M ⊙ rapidly rotating disk with scale length of 60 ± 20 pc has formed. The nuclear starburst is found in the vicinity as well as inside this nuclear disk, and our observations confirm that gas spirals in from the outer parts to feed the nuclear starburst, giving rise to several star formation events at different epochs, within the central 100 pc radius of M 83.

A&A manuscript no. (will be inserted by hand later) Your thesaurus codes are:

We present new H Fabry-Perot observations of the HH 1/2 system. Line proles, barycenter radial ve... more We present new H Fabry-Perot observations of the HH 1/2 system. Line proles, barycenter radial velocity maps and dispersion maps are derived from the channel maps of HH 1 and HH 2. The radial velocity barycenter maps of both HH 1 and HH 2 show a general trend of \red-shifted upstream/blue-shifted downstream" pattern. A \direct+scattered" component model for three emitting condensations is qualitatively successful at reproducing the general features of the barycenter and the velocity dispersion of HH 2.

Revista Mexicana De Astronomia Y Astrofisica, 2005

Presentamos nuevas observaciones Fabry-Perot del sistema HH1/2 en la linea de Hα. Se han obtenido... more Presentamos nuevas observaciones Fabry-Perot del sistema HH1/2 en la linea de Hα. Se han obtenidos los perfiles de las lineas, y los mapas de velocidad radial y de dispersion de velocidades a partir de los canales de velocidad de los objetos HH 1 y HH 2. La distribucion espacial de la velocidad radial de ambos objetos (HH 1, HH 2) presenta material desplazado al rojo hacia la fuente, y material desplazado al azul alejandose de la fuente. Un modelo que contempla la presencia de emision directa+dispersada con tres condensaciones emisoras reproduce cualitativamente la distribucion espacial de la velocidad radial y de la dispersion de velocidades de HH 2

Galaxies the Third Dimension, 2002

Stars and Galaxies from Observational Points of View / Звезды И Галактики В Наблюдательном Аспекте, 1975

The World of Galaxies, 1989

ABSTRACT

Astrophysics and Space Science, 2002

A long-term program based on Fabry-Perot Hα velocity field data of compact groups has been undert... more A long-term program based on Fabry-Perot Hα velocity field data of compact groups has been undertaken in order to analyse the kinematics of the compact group galaxies and the extent of their dark halos. The data are taken at the ESO and the CFH 3.6 m telescopes. The main goals of our project are: • To determine the evolutionary stages

Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, 2003

We present a third generation instrument using a photon counting camera (IPCS) based on an GaAs p... more We present a third generation instrument using a photon counting camera (IPCS) based on an GaAs photo cathode that can achieve quantum efficiency up to 28%, comparable to a thick CCD, but without readout noise. This system is 10 times more sensitive at the Halpha wavelength than previous Fabry Perot system used at the Observatoire du mont Mégantic. In terms

Scientific Detectors for …, 2004

The Astronomical Journal, 2003

We have obtained an H position-velocity cube from Fabry-Pérot interferometric observations of the... more We have obtained an H position-velocity cube from Fabry-Pérot interferometric observations of the HH 110 flow. We analyze the results in terms of anisotropic wavelet transforms, from which we derive the spatial distribution of the knots, as well as their characteristic sizes (along and across the outflow axis). We then study the spatial behavior of the line width and the central radial velocity. The results are interpreted in terms of a simple '' mean flow plus turbulent eddy '' jet/wake model. We find that most of the observed kinematics appears to be a direct result of the mean flow, on which are superposed low-amplitude ($35 km s À1) turbulent velocities.

Publications of the Astronomical Society of the Pacific, 2002

A third-generation image photon-counting system (IPCS) camera is presented, based on a GaAs photo... more A third-generation image photon-counting system (IPCS) camera is presented, based on a GaAs photocathode that can achieve a quantum efficiency of up to 23%, which is comparable to a thick CCD but without readout noise. This system is 10 times more sensitive at Ha than previous photon-counting cameras. In terms of signal-to-noise ratio, the system outperforms CCDs for extremely faint fluxes, including antireflectioncoated, low-noise, thin CCDs. This system, with up to 1K # 1K pixels, is one of the largest monolithic IPCSs. A unique cooling system, based on a Ranque-Hilsh vortex tube, is used for this camera. Real-time centering is done by a scalable digital signal processor board. Astrophysical projects and preliminary results obtained with this new camera coupled with a scanning Fabry-Pérot interferometer at the Cassegrain focus of the 3.6 m ESO telescope, the 1.93 m Observatoire de Haute Provence telescope, and the 1.6 m Observatoire du Mont Mégantic telescope are presented.

Nature, 1982

The galaxy NGC5128, better known as the powerful radio source Centaurus A, is a puzzling object a... more The galaxy NGC5128, better known as the powerful radio source Centaurus A, is a puzzling object appearing as an elliptical galaxy crossed by a dense lane of dust and gas. Its structure and evolution are not well understood, although this object is quite near (5 Mpc following Burbidge and Burbidge, 1959, is adopted), bright, and has been widely observed in the past few years. The first complete velocity field of the ionized gas in NGC5128, with a 10-km/s precision, is obtained from Perot-Fabry interferometry with the ESO 3.6-m telescope. It shows that the gas is rotating in a thick disk (approximately 1 kpc thickness), without any evidence of the perturbations expected from the encounter of an elliptical and a spiral galaxy. The observations favor the hypothesis of the evolution of a spiral galaxy in which the formation of the disk is very late compared with the bulge.