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High Time Resolution Photometry of Red Dwarf Flare Stars II. The Shortest Flare Rise Time

Published online by Cambridge University Press:  27 September 2017

G.M. Beskin ,
V.L. Plakhotnichenko ,
L.A. Pustil'nik ,
V.F. Shvartsman  and
R.E. Gershberg
G.M. Beskin
Affiliation:
Special Astrophysical Observatory Nizhni j Arkhyz, 357147 USSR
V.L. Plakhotnichenko
Affiliation:
Special Astrophysical Observatory Nizhni j Arkhyz, 357147 USSR
L.A. Pustil'nik
Affiliation:
Special Astrophysical Observatory Nizhni j Arkhyz, 357147 USSR
V.F. Shvartsman
Affiliation:
Special Astrophysical Observatory Nizhni j Arkhyz, 357147 USSR
R.E. Gershberg
Affiliation:
Crimean Astrophysical Observatory Crimea, Nauchny 334413 USSR

Abstract

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We have studied the initial phases of 65 optical flares on UV Cet type stars with a time resolution of 3x10–7 s. Ninety per cent of these flares have rapid brightenings shorter than 10 s and several are shorter than 1 s. We detected on UV Cet the shortest flare observed to date with a total duration of 1.7 s and a rise time of 0.3 s. The shortest flare rise times on the observed stars fit the predictions of the gas-dynamic flare model by Katsova et al. (1981) and Katsova and Livshits 1986).

Type
Session I: Stellar Flares
Information
International Astronomical Union Colloquium , Volume 104 , Issue 2: Solar and Stellar Flares , 1989 , pp. 99 - 101
Copyright
Copyright © Kluwer 1989

References

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