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Coronal Magnetic Fields of Algol Binaries from Microwave Spectra

Published online by Cambridge University Press:  12 April 2016

G. Umana ,
C. Trigilio ,
R. M. Hjellming ,
S. Catalano  and
M. Rodonò
G. Umana
Affiliation:
Istituto di Radioastronomia CNR, stazione di Noto, C.P. 169, Noto, Italy
C. Trigilio
Affiliation:
Istituto di Radioastronomia CNR, stazione di Noto, C.P. 169, Noto, Italy
R. M. Hjellming
Affiliation:
National Radio Astronomy Observatory, Socorro, N. M., USA
S. Catalano
Affiliation:
Istituto di Astronomia, Università di Catania, V. A. Doria 6, 95125 Catania, Italy
M. Rodonò
Affiliation:
Istituto di Astronomia, Università di Catania, V. A. Doria 6, 95125 Catania, Italy Osservatorio Astrofisico, Università di Catania, V. A. Doria 6, 95125 Catania, Italy

Extract

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Algol-type binaries are basically known to undergo hydrodynamic processes related to mass exchange between components. Recent observations on radio, X-ray emission and flare-like events have raised the question of possible magnetic activity in the secondary component of these systems (Hall, 1989).

From a microwave emission survey we have shown that the radio emission from Algol systems cannot be accounted for by thermal emission from an hot corona (T ≥ 107K) and that their radio luminosities compare very well with those of the magnetically active RS CVn systems (Umana et al., 1990).

Type
Part IV Stellar activity
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 498 - 500
Copyright
Copyright © Springer-Verlag 1991

References

Hall, D.S.: 1989, Space Sci. Rev. 50, 219 Google Scholar
Umana, G., Catalano, S., Rodonó, M.: 1990, Astron. Astrophys., submittedGoogle Scholar