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34 papers · 1 filter
Populations of WC and WN stars in WR galaxies: new constraints on starburst parameters
Thierry Contini, Daniel Schaerer, Daniel Kunth
Detection and analysis of Wolf-Rayet (WR) star populations in young starbursts is a powerful tool to reveal the properties of the star-forming events. We present new high S/N optic…
Models for WR and O Star Populations in Starbursts: New Developments and Applications to Large Samples of WR Galaxies
Daniel Schaerer
We summarise recent developments on synthesis models for massive star populations with a particular emphasis on Wolf-Rayet (WR) stars. Quantitative analysis of the stellar content…
AgapeZ1: a Large Amplification Microlensing Event or an Odd Variable Star Towards the Inner Bulge of M31
R. Ansari, M. Auriere, P. Baillon +14
AgapeZ1 is the brightest and the shortest duration microlensing candidate event found in the Agape data. It occured only 42" from the center of M31. Our photometry shows that the h…
The Lithium Plateau Enigma
C. Charbonnel, S. Vauclair
Why is the lithium abundance constant in the so-called lithium plateau while all predictions suggest that it should vary from star to star? Can we find a "lithium attractor" which…
The impact of new ionizing fluxes on ISO observations of HII regions and starbursts
Daniel Schaerer, Grazyna Stasinska
Extensive grids of photoionization models have been calculated for single star HII regions and evolving starbursts. We illustrate the predictions for IR fine structure lines which…
New catalogue of Wolf-Rayet galaxies and high-excitation extra-galactic HII regions
Daniel Schaerer, Thierry Contini, Maximilien Pindao
We present a new compilation of Wolf-Rayet (WR) galaxies and extra-galactic HII regions showing BROAD HeII emission drawn from the literature. Relevant information on the presence…