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Grazia Umana, Carla S. Buemi, Corrado Trigilio, Paolo Leto, Joseph L. Hora & Giovanni Fazio

The nebulae around LBVs: a multiwavelength approach

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Open Access

Abstract

We present first results of our study of a sample of Galactic LBV, aimed to contribute to a better understanding of the LBV phenomenon, by recovering the mass-loss history of the central object from the analysis of its associated nebula. Mass-loss properties have been derived by a synergistic use of different techniques, at different wavelengths, to obtain high-resolution, multi-wavelength maps, tracing the different emitting components coexisting in the stellar ejecta: the ionized/neutral gas and the dust. Evidence for asymmetric mass-loss and observational evidence of possible mutual interaction between gas and dust components have been observed by the comparison of mid-IR (Spitzer/IRAC, VLT/VISIR) and radio (VLA) images of the nebulae, while important information on the gas and dust composition have been derived from Spitzer/IRS spectra.

To cite this article

Grazia Umana, Carla S. Buemi, Corrado Trigilio, Paolo Leto, Joseph L. Hora & Giovanni Fazio, «The nebulae around LBVs: a multiwavelength approach», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 335 - 340 URL : https://popups.uliege.be/0037-9565/index.php?id=2785.

About: Grazia Umana

INAF-Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, ITALY

About: Carla S. Buemi

INAF-Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, ITALY

About: Corrado Trigilio

INAF-Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, ITALY

About: Paolo Leto

INAF-Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, ITALY

About: Joseph L. Hora

Harvard-Smithsonian Center for Astrophysics, 60 Garden St. MS-65, Cambridge, MA 02138-1516, USA

About: Giovanni Fazio

Harvard-Smithsonian Center for Astrophysics, 60 Garden St. MS-65, Cambridge, MA 02138-1516, USA