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See detailHu, Luojia , Estimation of a censored dynamic panel data model,Econometrica. Journal of the Econometric Society
Rochus, Pierre ULg

in Mathematical Reviews [=MR] (2002), 70(6), 2499--2517

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See detailHubble observations of Jupiter’s north–south conjugate ultraviolet aurora
Gérard, Jean-Claude ULg; Grodent, Denis ULg; Radioti, Aikaterini ULg et al

in Icarus (2013), 226

Comparisons of the northern and southern far ultraviolet (UV) auroral emissions of Jupiter from the Hubble Space Telescope (HST) or any other ultraviolet imager have mostly been made so far on a ... [more ▼]

Comparisons of the northern and southern far ultraviolet (UV) auroral emissions of Jupiter from the Hubble Space Telescope (HST) or any other ultraviolet imager have mostly been made so far on a statistical basis or were not obtained with high sensitivity and resolution. Such observations are important to discriminate between different mechanisms responsible for the electron acceleration of the different components of the aurora such as the satellite footprints, the «main oval» or the polar emissions. The field of view of the ACS and STIS cameras on board HST is not wide enough to provide images of the full jovian disk. We thus compare the morphology of the north and south aurora observed 55 min apart and we point out similarities and differences. On one occasion HST pointed successively the two polar regions and auroral images were seen separated by only 3 min. This makes it possible to compare the emission structure and the emitted FUV power of corresponding regions. We find that most morphological features identified in one hemisphere have a conjugate counterpart in the other hemisphere. However, the power associated with conjugate regions of the main oval, diffuse or discrete equatoward emission observed quasi-simultaneously may be different in the two hemispheres. It is not directly nor inversely proportional to the strength of the B-field as one might expect for diffuse precipitation or field-aligned acceleration with equal ionospheric electron density in both hemispheres. Finally, the lack of symmetry of some polar emissions suggests that some of them could be located on open magnetic field lines. [less ▲]

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See detailHubble sans COSTAR
Grodent, Denis ULg; Dols, Vincent

Scientific conference (1994, June 23)

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See detailHubble Space Telescope far-ultraviolet imaging of Jupiter during the impacts of Comet Shoemaker-Levy 9
Clarke, J. T.; Prange, R.; Ballester, G. E. et al

in Highlights of Astronomy, Vol. 10 (1995)

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See detailHubble Space Telescope Goddard high-resolution spectrograph H2 rotational spectra of Jupiter's aurora
Clarke, John T; Ben Jaffel, Lotfi; Vidal-Madjar, Alfred et al

in Astrophysical Journal (1994), 430

We have observed the emission spectrum from Jupiter's north auroral atmosphere with 0.57 A spectral resolution over 1204-1241 A. Bright emissions have been detected from 50 deg to 60 deg latitude at ... [more ▼]

We have observed the emission spectrum from Jupiter's north auroral atmosphere with 0.57 A spectral resolution over 1204-1241 A. Bright emissions have been detected from 50 deg to 60 deg latitude at locations consistent with 6 to 30 R [SUB]J[/SUB] auroral ovals, with much fainter emissions away form the auroral ovals. The emission spectrum is well fitted by both laboratory spectra and theoretical models of optically thin electron excited H2, with added Doppler-broadened Lyman Alpha emission. The observed Lyman Alpha emission wings extend more than 1 A from line center and appear correlated in strength with the H2 brightness. Individual rotational lines in the H2 Werner band system are resolved, allowing a determination of the H2 rotational temperature at the altitude of the emission. We derive best-fit temperatures from 400-450 to 700-750 K, with the auroral emission layer temperature changing either across the auroral oval or over several days' time. These observations demonstrate for the first time the ability to measure the observed rapid H2 temperature variations across Jupiter's auroral atmosphere. [less ▲]

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See detailHubble Space Telescope imaging of Jupiter's UV aurora during the Galileo orbiter mission
Clarke, John T; Ben Jaffel, Lotfi; Gérard, Jean-Claude ULg

in Journal of Geophysical Research (1998), 103

Hubble Space Telescope (HST) Wide-Field Planetary Camera 2 (WFPC 2) images of Jupiter's aurora have been obtained close in time with Galileo ultraviolet spectrometer (UVS) spectra and in situ particles ... [more ▼]

Hubble Space Telescope (HST) Wide-Field Planetary Camera 2 (WFPC 2) images of Jupiter's aurora have been obtained close in time with Galileo ultraviolet spectrometer (UVS) spectra and in situ particles, fields, and plasma wave measurements between June 1996 and July 1997, overlapping Galileo orbits G1, G2, G7, G8, and C9. This paper presents HST images of Jupiter's aurora as a first step toward a comparative analysis of the auroral images with the in situ Galileo data. The WFPC 2 images appear similar to earlier auroral images, with the main ovals at similar locations to those observed over the preceding 2 years, and rapidly variable emissions poleward of the main ovals. Further examples have been observed of the equatorward surge of the auroral oval over 140-180° longitude as this region moves from local morning to afternoon. Comparison of the WFPC 2 reference auroral ovals north and south with the VIP4 planetary magnetic field model suggests that the main ovals map along magnetic field lines exceeding 15R[SUB]J[/SUB], and that the Io footprint locations have lead angles of 0-10° from the instantaneous magnetic projection. There was an apparent dawn auroral storm on June 23, 1996, and projections of the three dawn storms imaged with HST to date demonstrate that these appear consistently along the WFPC 2 reference oval. Auroral emissions have been consistently observed from Io's magnetic footprints on Jupiter. Possible systematic variations in brightness are explored, within factor of 6 variations in brightness with time. Images are also presented marked with expected locations of any auroral footprints associated with the satellites Europa and Ganymede, with localized emissions observed at some times but not at other times. [less ▲]

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See detailHubble Space Telescope Near-IR Transmission Spectroscopy of the Super-Earth HD 97658b
Knutson, Heather A.; Dragomir, Diana; Kreidberg, Laura et al

E-print/Working paper (2014)

Recent results from the Kepler mission indicate that super-Earths (planets with masses between 1-10 times that of the Earth) are the most common kind of planet around nearby Sun-like stars. These planets ... [more ▼]

Recent results from the Kepler mission indicate that super-Earths (planets with masses between 1-10 times that of the Earth) are the most common kind of planet around nearby Sun-like stars. These planets have no direct solar system analogue, and are currently one of the least well-understood classes of extrasolar planets. Many super-Earths have average densities that are consistent with a broad range of bulk compositions, including both water-dominated worlds and rocky planets covered by a thick hydrogen and helium atmosphere. Measurements of the transmission spectra of these planets offer the opportunity to resolve this degeneracy by directly constraining the scale heights and corresponding mean molecular weights of their atmospheres. We present Hubble Space Telescope near-infrared spectroscopy of two transits of the newly discovered transiting super-Earth HD 97658b. We use the Wide Field Camera 3's scanning mode to measure the wavelength-dependent transit depth in thirty individual bandpasses. Our averaged differential transmission spectrum has a median 1 sigma uncertainty of 19 ppm in individual bins, making this the most precise observation of an exoplanetary transmission spectrum obtained with WFC3 to date. Our data are inconsistent with a cloud-free solar metallicity atmosphere at the 17 sigma level. They are a good match for flat models corresponding to either a metal-rich atmosphere or a solar metallicity atmosphere with a cloud or haze layer located at pressures of a mbar or higher. [less ▲]

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See detailHubble Space Telescope/Advanced Camera for Surveys Observations of Europa's Atmospheric Ultraviolet Emission at Eastern Elongation
Saur, Joachim; Feldman, Paul D; Roth, Lorenz et al

in Astrophysical Journal (2011), 738

We report results of a Hubble Space Telescope (HST) campaign with the Advanced Camera for Surveys to observe Europa at eastern elongation, i.e., Europa's leading side, on 2008 June 29. With five ... [more ▼]

We report results of a Hubble Space Telescope (HST) campaign with the Advanced Camera for Surveys to observe Europa at eastern elongation, i.e., Europa's leading side, on 2008 June 29. With five consecutive HST orbits, we constrain Europa's atmospheric O I 1304 Å and O I 1356 Å emissions using the prism PR130L. The total emissions of both oxygen multiplets range between 132 ± 14 and 226 ± 14 Rayleigh. An additional systematic error with values on the same order as the statistical errors may be due to uncertainties in modeling the reflected light from Europa's surface. The total emission also shows a clear dependence of Europa's position with respect to Jupiter's magnetospheric plasma sheet. We derive a lower limit for the O[SUB]2[/SUB] column density of 6 × 10[SUP]18[/SUP] m[SUP]-2[/SUP]. Previous observations of Europa's atmosphere with the Space Telescope Imaging Spectrograph in 1999 of Europa's trailing side show an enigmatic surplus of radiation on the anti-Jovian side within the disk of Europa. With emission from a radially symmetric atmosphere as a reference, we searched for an anti-Jovian versus sub-Jovian asymmetry with respect to the central meridian on the leading side and found none. Likewise, we searched for departures from a radially symmetric atmospheric emission and found an emission surplus centered around 90° west longitude, for which plausible mechanisms exist. Previous work about the possibility of plumes on Europa due to tidally driven shear heating found longitudes with strongest local strain rates which might be consistent with the longitudes of maximum UV emissions. Alternatively, asymmetries in Europa's UV emission can also be caused by inhomogeneous surface properties, an optically thick atmospheric contribution of atomic oxygen, and/or by Europa's complex plasma interaction with Jupiter's magnetosphere. [less ▲]

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See detailHUBERT SUMLIN Portrait/Interview
Sacré, Robert ULg

Article for general public (1976)

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See detailHubert Juin
Stienon, Valérie ULg

in Blanchaud, Corinne (Ed.) Dictionnaire des écrivains francophones classiques. Belgique, Canada, Québec, Luxembourg, Suisse romande (2013)

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See detailHubert Juin
Stienon, Valérie ULg

in Mathis-Moser, Ursula; MERTZ-BAUMGARTNER, Birgit (Eds.) Passages et ancrages en France. Dictionnaire des écrivains migrants de langue française (1981-2011) (2012)

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See detailHubert Nyssen
Durand, Pascal ULg

in Mathis-Moser, Ursula; Mertz-Baumgartner, Birgit (Eds.) Passages et ancrages. Dictionnaire des écrivains migrants en France (1981-2011) (2012)

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See detailHubert Nyssen : d’un arbre à l’autre
Durand, Pascal ULg

in Carnet et les Instants (2005), 137

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See detailHubert Nyssen, Du Texte au Livre, les avatars du sens : entre accastillage et orchestration
Durand, Pascal ULg

Conference (2012, June)

Examen du point de vue pris par Hubert Nyssen, à la fois écrivain et éditeur, sur la question du paratexte éditorial, comparativement au point de vue de Gérard Genette sur cette même question. Description ... [more ▼]

Examen du point de vue pris par Hubert Nyssen, à la fois écrivain et éditeur, sur la question du paratexte éditorial, comparativement au point de vue de Gérard Genette sur cette même question. Description des forces formatrices de ce point de vue singulier pris sur l'« accastillage » du texte, de l'avant-texte à la promotion médiatique. [less ▲]

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See detailHubert Nyssen, écrivain et fondateur des éditions Actes Sud
Durand, Pascal ULg; Chambon, Jacqueline; Manguel, Alberto

Speech (2012)

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See detailHubert Nyssen, écrivain et fondateur des éditions Actes Sud
Durand, Pascal ULg; Nuttens, Bruno

Book published by Centre Wallonie-Bruxelles (2012)

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See detailHubert Nyssen, les passions de l’éditeur, la fougue de l’écrivain
Durand, Pascal ULg

Speech (2007)

Entretien avec Hubert Nyssen à la Foire du Livre de Bruxelles

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See detailHubert Nyssen, une journée d'études à l'ULg pour saluer l'écrivain
Durand, Pascal ULg; Paquot, Michel

Article for general public (2013)

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See detailHubert-Guillaume Blonden, ingénieur-directeur des Travaux Publics à Liège
Raschevitch, Sonia ULg

in Catalogue de l'exposition Visages Urbains de Liège depuis 1830 (1985)

Hubert-Guillaume BLONDEN (Gronsveld 14 septembre 1816- Liège 15 décembre 1881) Ingénieur-Directeur des Travaux Publics de la Ville de Liège (1857-1880) Au milieu du XIXe siècle Liège connut les plus ... [more ▼]

Hubert-Guillaume BLONDEN (Gronsveld 14 septembre 1816- Liège 15 décembre 1881) Ingénieur-Directeur des Travaux Publics de la Ville de Liège (1857-1880) Au milieu du XIXe siècle Liège connut les plus importants travaux publics depuis ses origines. Blonden a attaché son nom à l’agrandissement, à l’embellissement et à l’assainissement de la cité. « Son œuvre est sous nos yeux, nous la parcourons tous les jours » déclara l’Echevin Louis Verdin dans son éloge funèbre. La Ville donna son nom à une avenue dès 1882. [less ▲]

Detailed reference viewed: 26 (1 ULg)