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Flares Detected on Some Late Giants: Are They Real?

Published online by Cambridge University Press:  12 April 2016

R. Konstantinova-Antova ,
M.M. Ivanov  and
A.P. Antov
R. Konstantinova-Antova
Affiliation:
Institute of Astronomy, Bulgarian Academy of Sciences, 72 Tsarigradsko shose, BG-1784 Sofia, Bulgaria
M.M. Ivanov
Affiliation:
Department of Astronomy, Sofia University, 5 James Bourchier Av., BG-1126 Sofia, Bulgaria
A.P. Antov
Affiliation:
Institute of Astronomy, Bulgarian Academy of Sciences, 72 Tsarigradsko shose, BG-1784 Sofia, Bulgaria

Extract

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Recently, some apparently single red giants with evidence of chromospheric activity were reported. In this work we observed those single late giants with reported flares, referenced by Pettersen (1989) and Schaefer (1989), as part of a program for investigation of the chromospheric activity in G and K giants.

According to Simon & Drake (1989), active single G and K giants may be first crossing stars that have just entered the phase of rapid spin-up as their convection zones advance upon their more rapidly rotation radiative cores. These stars are situated on the base of the red giant branch on the HR diagram. As a result they may possess dynamo driven activity at this stage of evolution.

Type
Flares in Late-type Stars: Radio and Optical
Information
International Astronomical Union Colloquium , Volume 151: Flares and Flashes , 1995 , pp. 97 - 100
Copyright
Copyright © Springer-Verlag 1995

References

Allen, C.W., 1973, Astrophysical Quantities, Athlone Press, London, p. 289ff.Google Scholar
Brown, J.A., Sneden, Ch., Lambert, D.L., Dutchover, E. Jr., 1989, ApJS 71, 293 Google Scholar
Pettersen, B.R., 1989, Solar Phys. 121, 299 Google Scholar
Schaefer, B.E., 1989, ApJ 337, 927 Google Scholar
Schaller, G., Schaerer, D., Meynert, G., Maeder, A., 1992, A&A 96, 269 Google Scholar
Simon, T., Drake, S.A., 1989, ApJ 346, 303 Google Scholar
Strassmeier, K.G., Fekel, F.C., Bopp, B.W., Dempsey, R.C., Henry, G.W., 1990, ApJS 72, 191 Google Scholar
Tsvetkov, M.K., Pettersen, B.R., 1985, A&A 150, 160 Google Scholar
Ulmschneider, P., 1979, SSR 24, 71 Google Scholar
Wilson, O.C., 1976, ApJ 205, 823 Google Scholar