References of "Nazé, Yaël"
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See detail1609, la révolution de l'observation
Nazé, Yaël ULg

Article for general public (2009)

Not Available

Detailed reference viewed: 31 (4 ULg)
See detailHistoire du télescope, la contemplation de l'Univers, des premiers instruments aux actuelles machines célestes
Nazé, Yaël ULg

Book (2009)

Alors que la plupart des scientifiques réalisent leurs expérimentations en laboratoire, les astronomes sont condamnés à ne jamais pouvoir toucher l'objet de leurs travaux: le ciel se laisse contempler ... [more ▼]

Alors que la plupart des scientifiques réalisent leurs expérimentations en laboratoire, les astronomes sont condamnés à ne jamais pouvoir toucher l'objet de leurs travaux: le ciel se laisse contempler mais demeure hors d'atteinte. Pour déchiffrer le message céleste, l'oeil ne suffit pas. Il fallut attendre la naissance de la première lunette astronomique pour ouvrir une nouvelle voie à notre insatiable désir de savoir. Ancêtre de tous les télescopes petits et grands, ce tout premier instrument d'observation allait en effet étendre vers l'infini le pouvoir de nos yeux. Quatre cents ans aprè, ce sont d'immenses machines qui scrutent pour nous l'Univers, en nous permettant même de remonter le temps. C'est leur histoire qui nous est racontée ici mais, par deça les engins les plus complexes, ce livre nous parle de leurs bâtisseurs. Démontant au passage certaines idées reçues, ce livre nous plonge dans les balbutiements de ces instruments avant de nous emmener côtoyer les premiers géants et découvrir les révolutions en cours. Illustré de nombreux documents historiques et techniques, ce récit est également pourvu d'encadrés expliquant en profondeur le fonctionnement des instruments. [less ▲]

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See detailAurores, les lumières atmosphériques
Nazé, Yaël ULg

Article for general public (2009)

Not Available

Detailed reference viewed: 14 (1 ULg)
See detailHot stars survey with the GAIA space mission
Lobel, A.; Liu, C.; Frémat, Y. et al

Poster (2009)

Detailed reference viewed: 28 (11 ULg)
See detailLunettes et télescopes, l'Univers se dévoile
Jaminon, Martine ULg; Nazé, Yaël ULg; Taton, Fabrice

Learning material (2009)

Plaquette de l'exposition "Lunettes et Télescopes : l'Univers se dévoile" + animations flash illustrant la réflexion par des miroirs sphériques et la réfraction par des lentilles divergentes et ... [more ▼]

Plaquette de l'exposition "Lunettes et Télescopes : l'Univers se dévoile" + animations flash illustrant la réflexion par des miroirs sphériques et la réfraction par des lentilles divergentes et convergentes. [less ▲]

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See detailAstronomie et religion
Nazé, Yaël ULg

Article for general public (2009)

Detailed reference viewed: 6 (2 ULg)
See detailLes planètes
Nazé, Yaël ULg

Article for general public (2009)

Detailed reference viewed: 6 (1 ULg)
See detailThe Europlanet national nodes network
Fouchet, T.; Heward, A.; Chatzchristou, E. T. et al

Poster (2009)

Detailed reference viewed: 3 (1 ULg)
See detailThe strange case of the Of?p stars
Nazé, Yaël ULg; Walborn, N. R.; Martins, F. et al

Poster (2009)

Detailed reference viewed: 6 (2 ULg)
See detailEmission line stars in the Milky Way with the GAIA space mission
Martayan, C.; Frémat, Y.; Blomme, R. et al

Poster (2009)

Detailed reference viewed: 6 (0 ULg)
See detailMassive stars and emission-line stars with GAIA
Blomme, Ronny; Frémat, Y.; Lobel, Alex et al

Poster (2009)

Detailed reference viewed: 7 (0 ULg)
See detailReaching the schools
Nazé, Yaël ULg

Poster (2009)

Detailed reference viewed: 4 (0 ULg)
See detailOutreach goals of the Europa Jupiter System Mission
Blanc, M.; Coustenis; Nazé, Yaël ULg et al

Poster (2009)

Detailed reference viewed: 12 (0 ULg)
See detailL'Astronomie des anciens
Nazé, Yaël ULg

Article for general public (2009)

Detailed reference viewed: 5 (0 ULg)
See detailAstrobiologie cours-conférence du Collège Belgique (ARB)
Javaux, Emmanuelle ULg; Wilmotte, Annick ULg; Claeys, Philippe et al

Learning material (2009)

cours enregistrés sur le site de l'ARB (http://www.academieroyale.be/)

Detailed reference viewed: 39 (9 ULg)
Full Text
See detailThe Gaia satellite: a tool for Emission Line Stars and Hot Stars
Martayan, C.; Frémat, Y.; Blomme, R. et al

in SF2A-2008 (2008, November 01)

The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provide parallaxes for each ... [more ▼]

The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provide parallaxes for each star and spectra for stars till V magnitude equal to 17. After a general description of Gaia, we present the codes and methods, which are currently developed by our team. They will provide automatically the astrophysical parameters and spectral classification for the hot and emission line stars in the Milky Way and other close local group galaxies such as the Magellanic Clouds. [less ▲]

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See detailThe first orbital solution for the massive colliding-wind binary HD 93162 (=WR 25)
Gamen, R.; Gosset, Eric ULg; Morrell, N. I. et al

in Revista Mexicana de Astronomia y Astrofisica Conference Series (2008, August 01)

Since the discovery, with EINSTEIN, of strong X-ray emission associated with HD 93162, this object was recurrently predicted by some authors to be a colliding-wind binary system. However, radial-velocity ... [more ▼]

Since the discovery, with EINSTEIN, of strong X-ray emission associated with HD 93162, this object was recurrently predicted by some authors to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have never been found so far. We spectroscopically monitored this object in order to investigate its possible variability and to provide an answer to the above-mentioned discordance. We derived radial velocities from spectroscopic data acquired mainly between 1994 and 2006, and searched for periodicities. For the first time, periodic radial-velocity variations are detected. Our analysis definitively shows that the Wolf-Rayet star WR 25 is actually an eccentric binary system with a probable period of about 208 days. [less ▲]

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See detailTowards an Understanding of the Of?p star HD 191612: Optical Spectroscopy
Howarth, I. D.; Walborn, N. R.; Lennon, D. J. et al

in Revista Mexicana de Astronomia y Astrofisica Conference Series (2008, August 01)

We have acquired extensive optical spectroscopy of the early-type magnetic star HD 191612 (O6.5f?pe-O8fp). The Balmer and HeI lines show strongly variable emission which is extremely reproducible on a ... [more ▼]

We have acquired extensive optical spectroscopy of the early-type magnetic star HD 191612 (O6.5f?pe-O8fp). The Balmer and HeI lines show strongly variable emission which is extremely reproducible on a well-determined 538-d period. Metal lines and HeII absorptions (including many selective emission lines, but excluding HeII lambda 4686 Å emission) are nearly constant in line strength, but are variable in velocity. The radial-velocity variations establish a double-lined binary orbit with P_{orb} = 1542d, e = 0.44; by elimination, rotational modulation of a magnetically constrained plasma is left as by far the most likely `clock' underlying the 538-d changes. The implied rotation period shows that slow rotators can easily be hidden in the O-star population, with gaussian-like `turbulence' dominating the line widths. [less ▲]

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See detailEuroPlaNet: Improving the Communication on Planetary Sciences
Nazé, Yaël ULg; Heward, A.

in EPO and a Changing World: Creating Linkages and Expanding Partnerships (2008, June 01)

EuroPlaNet is an EC-funded consortium. It coordinates the activities of European researchers working in planetary sciences but it is not only aimed at pure scientific activities. Its outreach action ... [more ▼]

EuroPlaNet is an EC-funded consortium. It coordinates the activities of European researchers working in planetary sciences but it is not only aimed at pure scientific activities. Its outreach action involves a networking of the members, in order to promote the planetary sciences in Europe, improve the public awareness of the major European achievements & projects, and stimulate the use of planetary sciences for the promotion of scientific education and culture at large. For more information: \url{http://www.europlanet-eu.org/} or \url{http://www.europlanet.cesr.fr/}. [less ▲]

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See detailMagnetic Massive Stars
Townsend, Rich; Cohen, David H; Dessart, Luc et al

in IAU Symposium (2008, June 01)

Magnetic fields are unexpected in massive stars, due to the absence of a sub-surface convective dynamo. However, advances in instrumentation over the past three decades have led to their detection in a ... [more ▼]

Magnetic fields are unexpected in massive stars, due to the absence of a sub-surface convective dynamo. However, advances in instrumentation over the past three decades have led to their detection in a small but growing subset of these stars. Moreover, complementary theoretical developments have highlighted their potentially significant influence over the structure, evolution and circumstellar environments of massive stars. Here, we summarize a special session convened prior to the main conference, focused on presenting recent developments in the study of massive-star magnetic fields. [less ▲]

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