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Multi-wavelength Observations of the Red Giant R Doradus with the MAPPIT Interferometer

Published online by Cambridge University Press:  13 May 2016

A.P. Jacob ,
T.R. Bedding ,
J.G. Robertson ,
J.R. Barton ,
C.A. Haniff ,
R.G. Marson  and
M. Scholz
A.P. Jacob
Affiliation:
1 School of Physics, University of Sydney 2006, Australia
T.R. Bedding
Affiliation:
1 School of Physics, University of Sydney 2006, Australia
J.G. Robertson
Affiliation:
1 School of Physics, University of Sydney 2006, Australia
J.R. Barton
Affiliation:
1 School of Physics, University of Sydney 2006, Australia
C.A. Haniff
Affiliation:
1 School of Physics, University of Sydney 2006, Australia
R.G. Marson
Affiliation:
1 School of Physics, University of Sydney 2006, Australia
M. Scholz
Affiliation:
1 School of Physics, University of Sydney 2006, Australia

Abstract

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We present visibility measurements of the nearby Mira-like star R Doradus taken over a wide range of wavelengths (650-990 nm). The observations were made using MAPPIT (Masked APerture-Plane Interference Telescope), an interferometer operating at the 3.9-m Anglo-Australian Telescope. We used a slit to mask the telescope aperture and prism to disperse the interference pattern in wavelength. We observed in R Dor strong decreases in visibility within the TiO absorption bands. The results are in general agreement with theory but differ in detail, suggesting that further work is needed to refine the theoretical models.

Type
Stars and Stellar Atmospheres
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 298 - 299
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Hofmann, K. H., Scholz, M., & Wood, P. R., 1998, A&A, 339, 846.Google Scholar
Jacob, A. P., Bedding, T. R., Robertson, J. G., & Scholz, M., 2000a, MNRAS, 312, 733.CrossRefGoogle Scholar
Jacob, A. P., Bedding, T. R., Robertson, J. G., Barton, J. R., Haniff, C. A., Marson, R. G., & Scholz, M., 2000b, In Lena, P. J., & Quirrenbach, A., editors, Interferometry in Optical Astronomy, Proc. SPIE Vol. 4406, page 723 (astro-ph/0005195).CrossRefGoogle Scholar