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The origin of the dusty envelope around Betelgeuse

Published online by Cambridge University Press:  28 July 2017

Xavier Haubois ,
Barnaby Norris ,
Peter G. Tuthill ,
Christophe Pinte ,
Pierre Kervella ,
Julien Girard ,
Guy Perrin ,
Sylvestre Lacour ,
Andrea Chiavassa  and
S. T. Ridgway
Xavier Haubois
Affiliation:
European Organisation for Astronomical Research in the Southern Hemisphere, Casilla 19001, Santiago 19, Chile; email: xhaubois@eso.org
Barnaby Norris
Affiliation:
Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
Peter G. Tuthill
Affiliation:
Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
Christophe Pinte
Affiliation:
UJF-Grenoble 1 / CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble, UMR 5274, 38041 Grenoble, France
Pierre Kervella
Affiliation:
LESIA, (UMR 8109), Observatoire de Paris, PSL, CNRS, UPMC, Univ. Paris-Diderot, 5 place Jules Janssen, 92195 Meudon, France
Julien Girard
Affiliation:
European Organisation for Astronomical Research in the Southern Hemisphere, Casilla 19001, Santiago 19, Chile; email: xhaubois@eso.org
Guy Perrin
Affiliation:
LESIA, (UMR 8109), Observatoire de Paris, PSL, CNRS, UPMC, Univ. Paris-Diderot, 5 place Jules Janssen, 92195 Meudon, France
Sylvestre Lacour
Affiliation:
LESIA, (UMR 8109), Observatoire de Paris, PSL, CNRS, UPMC, Univ. Paris-Diderot, 5 place Jules Janssen, 92195 Meudon, France
Andrea Chiavassa
Affiliation:
Laboratoire Lagrange, Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Boulevard de l’Observatoire, CS 34229, 06304 Nice Cedex 4, France
S. T. Ridgway
Affiliation:
National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726-6732, USA
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Abstract

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The origin of red supergiant mass loss still remains to be unveiled. Characterising the formation loci and the dust distribution in the first stellar radii above the surface is key to understand the initiation of the mass loss phenomenon. Polarimetric interferometry observations in the near-infrared allowed us to detect an inner dust atmosphere located only 0.5 stellar radius above the photosphere of Betelgeuse. We modelled these observations and compare them with visible polarimetric measurements to discuss the dust distribution properties.

Keywords

Convection-techniques: interferometric- stars: fundamental parameters- infrared: stars- stars: individual: Betelgeuse
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 405
Copyright
Copyright © International Astronomical Union 2017 

References

Kervella, P., Lagadec, E., Montargès, M., et al. 2016, A&A, 585, A28 Google Scholar