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Flare Colours and Luminosities

Published online by Cambridge University Press:  14 August 2015

S. Cristaldi  and
M. Rodonò
S. Cristaldi
Affiliation:
Catania Astrophysical Observatory
M. Rodonò
Affiliation:
Catania Astrophysical Observatory

Abstract

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Flare colours determined from simultaneous UBV observations made at Catania Observatory and from sequential UBV observations made at McDonald Observatory are presented. They fit fairly well with the theoretical colours computed according to the Gurzadian's (1970) non-thermal model. Only part of the observed flare colours are consistent with the solar type models by Gershberg (1967) and Kunkel (1970).

From a B-band patrol of UV Cet-type stars carried out from 1967 to 1972, some quantitative estimates of flare frequencies and luminosities and of their average contribution to the stellar radiation are given.

The corresponding parameters for the Sun, which were estimated from ‘white light’ flare activity, are also given for comparison. The Sun and V 1216 Sgr can be regarded as low-activity flare stars of the type found by Kunkel (1973).

Type
Part 1 / Flare Stars and T Tauri Stars
Information
Symposium - International Astronomical Union , Volume 67: Variable Stars and Stellar Evolution , 1975 , pp. 75 - 89
Copyright
Copyright © Reidel 1975 

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