7 papers · 1 filter
The Gaia satellite: a tool for Emission Line Stars and Hot Stars
Christophe Martayan, Yves Fremat, Ronny Blomme +19
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 provid…
Variability of B and Be stars in the LMC/SMC: binaries and pulsations
Christophe Martayan, Pascual Diago, Juan Gutiérrez-Soto +5
To study the variability of the 523 B and Be stars observed in the Magellanic clouds with the VLT-FLAMES, we cross-matched the stars of our sample with the photometric database MAC…
On the nature of early-type emission line objects in NGC6611
Christophe Martayan, Michele Floquet, Anne-Marie Hubert +4
The number and the nature of emission line stars in the young open cluster NGC6611 is still the object of debates. Due to the presence of a strong and variable nebulosity in the cl…
On the behaviour of B and Be stars at low metallicity
Christophe Martayan, Yves Fremat, Anne-Marie Hubert +7
We present new results obtained with the VLT GIRAFFE for a large sample of B and Be stars belonging to the Magellanic Clouds, i.e. at low metallicity. First, we show the effects of…
Multiperiodic pulsations in the Be stars NW Ser and V1446 Aql
J. Gutiérrez-Soto, J. Fabregat, J. Suso +7
Aims: We present accurate photometric time series of two Be stars: NW Ser and V1446 Aql. Both stars were observed at the Observatorio de Sierra Nevada (Granada) in July 2003 with a…
Zams Rotational Velocities of be Stars
Juan Zorec, Christophe Martayan, Yves Fremat +2
We show that Be stars belong to a high velocity tail of a single B-type star rotational velocity distribution in the main sequence (MS). We studied 127 galactic field Be stars and…