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See detailThe Enigma of B-type Pulsators in the SMC
Salmon, Sébastien ULg; Montalban Iglesias, Josefa ULg; Miglio, Andrea ULg et al

in AIP Conference Proceedings (2009, September 01), 1170

Since the early nineties it is accepted that the excitation mechanism of B-type pulsators on the main sequence is due to the opacity peak in the iron-group elements at T~200,000 K. The Fe content plays ... [more ▼]

Since the early nineties it is accepted that the excitation mechanism of B-type pulsators on the main sequence is due to the opacity peak in the iron-group elements at T~200,000 K. The Fe content plays then a major role in the excitation of β Cep and SPB pulsations. While theoretical non-adiabatic computations predict no β Cep pulsators and only a small number of SPBs for low metallicity environments such as that of the Magellanic Clouds (MCs), recent variability surveys of B stars in the SMC have reported the detection of a significant number of SPB and β Cep candidates. Since the SMC is the metal poorest (Z~0001-0.004) of the MCs, it constitutes an interesting object for investigating the disagreement between theory and observations. We approach the problem by calling into question some of the hypotheses made in previous studies: given the different chemical evolution of the SMC compared with our local galactic environment, is it appropriate to describe the chemical composition of SMC B stars by scaling the solar mixture to lower Z? Is that composition uniform in space and time? In this paper we present the results of a stability analysis of B-type stellar models computed with a revised chemical composition and metallicity specific to the SMC. [less ▲]

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See detailThe enigmatic flarings of HR2517.
Sterken, C.; Manfroid, Jean ULg

in Astronomy and Astrophysics (1996), 305

We report the discovery of strong flaring of the B3 II-III star HR2517. The evidence is based on Stroemgren differential uvby photometry spanning more than a decade. We discuss the behaviour of HR2517 in ... [more ▼]

We report the discovery of strong flaring of the B3 II-III star HR2517. The evidence is based on Stroemgren differential uvby photometry spanning more than a decade. We discuss the behaviour of HR2517 in terms of two models, viz. a rooted bright spot suddenly appearing and developing with modulation in photospheric temperature producing periodic light and profile variations as the star rotates, or that HR2517 is a Be star in an eccentric (P~33-34d) high-mass X-ray binary (HMXB) with neutron star companion--one of the brightest such systems known. [less ▲]

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See detailEnigmatic Givetian palynomorphs
Steemans, Philippe ULg

Report (2006)

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See detailL'énigme de Sirius
Heck, Andre; Manfroid, Jean ULg

Article for general public (1987)

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See detailL'énigme de Sirius
Heck, Andre; Manfroid, Jean ULg

Article for general public (1986)

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See detailL'énigme du Mont Agel (Alfred Machin, Henry Wulschleger, 1924)
Belloi, Livio ULg

in Claes, Gabrielle (Ed.) Les Cahiers du Muet (1995)

Analysis of the film's complex flashback construction.

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See detailLes énigmes de la "Joconde"
Fagnart, Laure ULg

Conference given outside the academic context (2007)

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See detailEnjeu climatique : Quel coût pour l’inaction ?
Ozer, Pierre ULg

in Politique : Revue de Débats (2009), Hors-série 12

Sans cesse, nous sommes assommés par une kyrielle de messages publicitaires qui passent la rampe sans le moindre problème et prônent un certain mode de société. Un supermarché exhorte « Vivez comme vous ... [more ▼]

Sans cesse, nous sommes assommés par une kyrielle de messages publicitaires qui passent la rampe sans le moindre problème et prônent un certain mode de société. Un supermarché exhorte « Vivez comme vous voulez », l’autre clame « Et tout devient possible ». En effet, dans ce dernier, même ce qui pourrait paraître impossible est possible… [less ▲]

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See detailL'enjeu de la maîtrise du foncier
Fontaine, Pierre; Halleux, Jean-Marie ULg

Conference given outside the academic context (2014)

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See detailL'enjeu de la satire chez Alphone Allais
Defays, Jean-Marc ULg

in French Literature Series (1987), XIV

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See detailEnjeux autour de la survie de l'Assemblée de l'Union de l'Europe occidentale : tensions, rivalités et contournements
Dumoulin, André ULg

in Wintgens, Sophie; Grégory, Piet (Eds.) La puissance : débat autour des jeux et des enjeux du pouvoir (2011)

Examen des rivalités et des résistances de l'Assemblée de l'UEO face à la décision de dénoncer le traité de Bruxelles modifié

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See detailEnjeux autour des forêts congolaises
Vermeulen, Cédric ULg

in Cahiers africains (2014), 84

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See detailEnjeux autour des forêts congolaises
Vermeulen, Cédric ULg

Conference (2013, April 19)

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See detailEnjeux autour des forêts congolaises. Conflits d’usage, conflits sans arbitres
Vermeulen, Cédric ULg

Conference given outside the academic context (2014)

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See detailEnjeux cognitifs de l’esquisse dans la littérature européenne du XIXe siècle
Stienon, Valérie ULg

in @nalyses : Revue de Critique et de Théorie Littéraire (2008)

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See detailLes enjeux confessionnels et politiques des cérémonies pour la canonisation d’Ignace de Loyola et de François-Xavier : le cas dunkerquois
Delfosse, Annick ULg

in Actes du Huitième Congrès de l’Association des Cercles francophones d’Histoire et d’Archéologie de Belgique : Namur, 28-31 août 2008 (2011)

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See detailLes enjeux culturels des défis linguistiques
Defays, Jean-Marc ULg

Conference given outside the academic context (2012)

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See detailLes enjeux d’un accueil de qualité en Communauté française de Belgique
Camus, Pascale ULg; Pirard, Florence ULg

in Feutry, J. P. (Ed.) Respect des droits de l’enfant et pratiques éducatives en Europe (2011)

Detailed reference viewed: 32 (7 ULg)