Bulletin de la Société Royale des Sciences de Liège Bulletin de la Société Royale des Sciences de Liège -  Volume 80 - Année 2011 

X-shooter, NACO, and AMBER observations of the LBV Pistol Star

C. Martayan, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile, and GEPI, Observatoire de Paris, place Jules Janssen 92195 Meudon Cedex, France

R. Blomme, 

Royal Observatory of Belgium, 3 avenue circulaire, 1180 Brussel, Belgium

J.-B. Le Bouquin, 

Laboratoire d’Astrophysique de Grenoble, 38400 Saint-Martin d’Hères, France

A. Merand, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

G. Montagnier, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

F. Selman, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

J. Girard, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

A. Fox, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

D. Baade, 

ESO, Karl-Schwarschild-Str. 2, Garching bei Muenchen, Germany

Y. Frémat, 

Royal Observatory of Belgium, 3 avenue circulaire, 1180 Brussel, Belgium

A. Lobel, 

Royal Observatory of Belgium, 3 avenue circulaire, 1180 Brussel, Belgium

F. Martins, 

GRAAL - UMR5024 Université de Montpellier II - CC 72 34095 Montpellier Cedex 05 France

F. Patru, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

T. Rivinius, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

H. Sana, 

Universiteit van Amsterdam Sterrenkundig 1090 GE Amsterdam The Netherlands

S. Stefl, 

ESO, Alonso de Cordova 3107 Vitacura, Santiago, Chile

J. Zorec, 

Institut d’Astrophysique de Paris, UMR7095 CNRS, Université P& MC, 98bis boulevard Arago, 75014 Paris, France

T. Semaan, 

GEPI, Observatoire de Paris, place Jules Janssen 92195 Meudon Cedex, France

Abstract

We present multi-instrument and multi-wavelength observations of the famous LBV star Pistol Star.

These observations are part of a larger program on early O stars at different metallicities. The Pistol Star has been claimed to be one of the most massive star known, with 250 solar masses. We present preliminary results based on X-shooter spectra, as well as observations performed with the VLTI-AMBER and the VLTNACO adaptive optics. The X-shooter spectrograph provides simultaneously a spectrum from the UV to the K-band with a resolving power of ±15000. The preliminary results obtained indicate that Pistol Star has similar properties to eta-Car, including shells of matter, but is also a binary.

Pour citer cet article

C. Martayan, R. Blomme, J.-B. Le Bouquin, A. Merand, G. Montagnier, F. Selman, J. Girard, A. Fox, D. Baade, Y. Frémat, A. Lobel, F. Martins, F. Patru, T. Rivinius, H. Sana, S. Stefl, J. Zorec & T. Semaan, «X-shooter, NACO, and AMBER observations of the LBV Pistol Star», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 400 - 404 URL : http://popups.ulg.be/0037-9565/index.php?id=2870.