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Properties of Circumstellar Dust in Symbiotic Miras

Published online by Cambridge University Press:  09 August 2007

D. Kotnik-Karuza
Affiliation:
Physics Department, University of Rijeka, Omladinska 14, Rijeka, Croatia email: [email protected], [email protected]
T. Jurkic
Affiliation:
Physics Department, University of Rijeka, Omladinska 14, Rijeka, Croatia email: [email protected], [email protected]
M. Friedjung
Affiliation:
Institut d'Astrophysique de Paris, Universite Pierre & Marie Curie, 98bis, bd Arago, 75014 Paris, France email: [email protected]
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Abstract

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We present a study of the properties of circumstellar dust in symbiotic Miras during sufficiently long time intervals of minimal obscuration. The published JHKL magnitudes of o Ceti, RX Pup, KM Vel, V366 Car, V835 Cen, RR Tel and R Aqr have been collected. In order to investigate their long-term variations, we removed the Mira pulsations to correct their light curves. Assuming spherical temperature distribution of the dust in the close neighbourhood of the Mira, the DUSTY code was used to solve the radiative transfer in order to determine the dust temperature and its properties in each particular case.

The preliminary results of this systematic study of dust envelopes in symbiotic stars with Miras as cool components provide information on nature of dust in these objects.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

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