High-angular resolution observations of the Pistol Star

Alex Lobel; Andrew Fox (ESO-Chile); Antoine Merand (ESO-Chile); Christophe Martayan (ESO-Chile; Dietrich Baade (ESO-HQ); Fabien Patru (ESO-Chile); Fabrice Martins (GRAAL); Fernando Selman (ESO-Chile); GEPI); Guillaume Montagnier (ESO-Chile)

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High-angular resolution observations of the Pistol Star

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arxiv 1010.3342 v1 pith:PY2JN4VE submitted 2010-10-16 astro-ph.SR

Christophe Martayan (ESO-Chile , GEPI) , Ronny Blomme , Jean-Baptiste Le Bouquin (LAOG) , Antoine Merand (ESO-Chile) , Guillaume Montagnier (ESO-Chile) , Fernando Selman (ESO-Chile) , Julien Girard (ESO-Chile)

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Andrew Fox (ESO-Chile) Dietrich Baade (ESO-HQ) Yves Fremat Alex Lobel Fabrice Martins (GRAAL) Fabien Patru (ESO-Chile) Thomas Rivinius (ESO-Chile) Hugues Sana Stan Stefl (ESO-Chile) Jean Zorec (IAP) Thierry Semaan (GEPI)

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keywords pistolstaradaptiveassistedassociationblueconcerningdouble

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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.

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