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The Extended Hα Component of T Tau

Published online by Cambridge University Press:  19 July 2016

E. Thiébaut ,
N. Devaney ,
R. Foy ,
B. De Batz ,
A. Blazit ,
D. Bonneau ,
J. Bouvier  and
Ch. Thom
E. Thiébaut
Affiliation:
Observatoire de Paris-Meudon, DASGAL – FRANCE
N. Devaney
Affiliation:
Observatoire de Paris-Meudon, DASGAL – FRANCE
R. Foy
Affiliation:
Observatoire de Paris-Meudon, DASGAL – FRANCE
B. De Batz
Affiliation:
Observatoire de Paris-Meudon, DASGAL – FRANCE
A. Blazit
Affiliation:
Observatoire de la Côte d'Azur, Département A. Fresnel – FRANCE
D. Bonneau
Affiliation:
Observatoire de la Côte d'Azur, Département A. Fresnel – FRANCE
J. Bouvier
Affiliation:
Observatoire de Grenoble – FRANCE
Ch. Thom
Affiliation:
Institut Géographique National, SLOG/LOEMI – FRANCE

Abstract

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We report the observation of T Tau by visible speckle interferometry at the CFHT. The observations were carried out at two wavelengths simultaneously. Each image was split into two, allowing improved data processing. The 4-channel photon-counting detector CP40 was used. We have discovered that 30% of the total energy at Hα is emitted by an extended elliptical component, with a FWHM of 70 marcsec. In the neighbouring continuum, T Tau is not resolved by the 3.60 m CFHT. We briefly discuss the astrophysical consequences of this new result.

Keywords

Speckle InterferometryT Tau
Type
Imaging Results: Optical and Infrared
Information
Symposium - International Astronomical Union , Volume 158: Very High Angular Resolution Imaging , 1994 , pp. 391 - 394
Copyright
Copyright © Kluwer 1994 

References

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