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The design and performance of the Gaia photometric system
C. Jordi, E. Hoeg, A. G. A. Brown +32
The European Gaia astrometry mission is due for launch in 2011. Gaia will rely on the proven principles of ESA's Hipparcos mission to create an all-sky survey of about one billion…
Discovery and disentangling of multi-mode delta-Sct pulsations in the eclipsing binary V994 Her
S. Dallaporta, U. Munari
Accurate and extensive photoelectric photometry has been obtained of V994 Her which was discovered as an eclipsing binary by Hipparcos satellite. A marked pulsation activity is evi…
Spectroscopic Survey of the Galaxy with Gaia II. The expected science yield from the Radial Velocity Spectrometer
M. I. Wilkinson, A. Vallenari, C. Turon +21
The Gaia mission is designed as a Galaxy explorer, and will measure simultaneously, in a survey mode, the five or six phase space parameters of all stars brighter than 20th magnitu…
Observational Studies of Early-type Binary Stars: MP Centauri
Dirk Terrell, Ulisse Munari, Tomaz Zwitter +1
We present photometric and spectroscopic data on the early-type binary MP Centauri. The photometric data are analyzed simultaneously with radial velocities to derive preliminary ab…
Bipolar jets growth and decline in Hen 3-1341: a direct link to fast wind and outburst evolution
U. Munari, A. Siviero, A. Henden
The appearance and disappearance of collimated bipolar jets in the symbiotic star Hen 3-1341 is reported and investigated. From modeling of the emission line spectrum it turns out…
The first three years of the outburst and light-echo evolution of V838 Mon and the nature of its progenitor
U. Munari, A. Henden
V838 Mon has undergone one of the most mysterious stellar outbursts on record, with (a) a large amplitude (Delta B ~ 10 mag) and multi-maxima photometric pattern, (b) a cool spectr…