Proceedings of the International Astronomical Union

Contributed Papers

High-angular resolution observations of the Pistol star

Christophe Martayana1a2, Ronny Blommea3, Jean-Baptiste Le Bouquina4, Anthony Meranda1, Guillaume Montagniera1, Fernando Selmana1, Julien Girarda1, Andrew Foxa1, Dietrich Baadea5, Yves Frémata3, Alex Lobela3, Fabrice Martinsa6, Fabien Patrua1, Thomas Riviniusa1, Hugues Sanaa7, Stanislas Štefla1, Juan Zoreca8 and Thierry Semaana2

a1 ESO Chile

a2 GEPI-Observatoire de Meudon, France

a3 Royal Observatory of Belgium, Brussels, Belgium

a4 Laboratoire d'Astrophysique de Grenoble, France

a5 ESO Germany

a6 GRAAL, Montpellier, France

a7 Amsterdam University, The Netherlands

a8 Institut d'Astrophysique de Paris, France

Abstract

First results of near-IR adaptive optics (AO)-assisted imaging, interferometry, and spectroscopy of this Luminous Blue Variable (LBV) are presented. They suggest that the Pistol Star is at least double. If the association is physical, it would reinforce questions concerning the importance of multiplicity for the formation and evolution of extremely massive stars.

Keywords

  • binaries: general;
  • circumstellar matter;
  • stars: early-type;
  • stars: mass loss