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Interferometry of pulsating red giants from 0.65 to 3.5 microns

Published online by Cambridge University Press:  12 April 2016

Michael Ireland ,
Peter Tuthill ,
Gordon Robertson ,
Timothy Bedding ,
Andrew Jacob ,
John Monnier  and
William Danchi
Michael Ireland
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
Peter Tuthill
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
Gordon Robertson
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
Timothy Bedding
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
Andrew Jacob
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
John Monnier
Affiliation:
University of Michigan, Ann Arbor, MI, USA
William Danchi
Affiliation:
NASA Goddard, Infrared Astrophysics, Greenbelt, MD 20771, USA

Abstract

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We present the results of two multi-wavelength studies of the angular diameters of the Mira-like stars ο Cet, W Hya and R Leo. The MAPPIT experiment was able to deliver diameters of these stars over a continuous wavelength region from 0.65 – 1 micron, while the Keck aperture-masking experiment was able to deliver diameters between 1.2 and 3.5 microns. Strong size variations with wavelength were recorded for all stars, and we discuss the implications for model atmospheres of these stars, and speculate on the necessity of including dust scattering in radiative transfer calculations.

Type
Part 5. Red Giants, Miras, post-AGB stars and proto-planetary nebulae
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 327 - 331
Copyright
Copyright © Astronomical Society of the Pacific 2004

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