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Dust-forming molecules in VY Canis Majoris (and Betelgeuse)

Published online by Cambridge University Press:  23 May 2013

T. Kamiński ,
C.A. Gottlieb ,
M.R. Schmidt ,
N.A. Patel ,
K.H. Young ,
K.M. Menten ,
S. Brünken ,
H.S.P. Müller ,
J.M. Winters  and
M.C. McCarthy
T. Kamiński
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
C.A. Gottlieb
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, USA
M.R. Schmidt
Affiliation:
Nicolaus Copernicus Astronomical Center, Rabiańska 8, 87-100 Toruń, Poland
N.A. Patel
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, USA
K.H. Young
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, USA
K.M. Menten
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
S. Brünken
Affiliation:
I. Physikalisches Institut, Zülpicher Strasse 77, 50937 Köln, Germany
H.S.P. Müller
Affiliation:
I. Physikalisches Institut, Zülpicher Strasse 77, 50937 Köln, Germany
J.M. Winters
Affiliation:
IRAM, 300 rue de la Piscine, 38406 Saint-Martin d’Hères, France
M.C. McCarthy
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA, USA
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Abstract

The formation of inorganic dust in circumstellar environments of evolved stars is poorly understood. Spectra of molecules thought to be most important for the nucleation, i.e. AlO, TiO, and TiO2, have been recently detected in the red supergiant VY CMa. These molecules are effectively formed in VY CMa and the observations suggest that non-equilibrium chemistry must be involved in their formation and nucleation into dust. In addition to exploring the recent observations of VY CMa, we briefly discuss the possibility of detecting these molecules in the “dust-poor” circumstellar environment of Betelgeuse.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 60: Betelgeuse Workshop 2012 The Physics of Red Supergiants: Recent Advances and Open Questions , 2013 , pp. 191 - 198
Copyright
© EAS, EDP Sciences 2013

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