Detection of high-frequency optical oscillations on the flare star EV Lacertae

被引：0

作者：

Zhilyaev, BE

Romanyuk, YO

Verlyuk, IA

Svyatogorov, OA

Khalack, VR

Sergeev, AV

Konstantinova-Antova, RK

Antov, AP

Bachev, RS

Alekseev, IY

Chalenko, VE

Shakhovskoy, DN

Contadakis, ME

Avgoloupis, SJ

机构：

[1] Natl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, Ukraine

[2] Natl Acad Sci Ukraine, Int Res Ctr Astron Med & Ecol, UA-03680 Kiev, Ukraine

[3] Bulgarian Acad Sci, Inst Astron, BU-1784 Sofia, Bulgaria

[4] Crimean Astrophys Observ, UA-98409 Nauchnyi, Crimea, Ukraine

[5] Univ Thessaloniki, Dept Geodesy & Surveying, GR-54006 Thessaloniki, Greece

[6] Univ Thessaloniki, Dept Phys, Sect Astrophys Astron & Mech, GR-54006 Thessaloniki, Greece

[7] Kiev Branch, Isaac Newton Inst Chile, Kiev, Ukraine

来源：

ASTRONOMY & ASTROPHYSICS | 2000年 / 364卷 / 02期

关键词：

stars : flare; stars : oscillations; stars : individual : EV Lac;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Many-site multichannel simultaneous observations of the flare star EV Lac revealed high-frequency brightness oscillations superimposed on the mean flare light curve. Oscillations occur at the earliest stage of a flare and are visible during the high state. Coherent oscillations of 26 and 13 sec were seen during three flare events. The pulsed fractions were 2.5% in the B band and 10-15% in the U band. This oscillatory phenomenon can be used to improve our understanding of the flare process.

引用

页码：641 / 645

页数：5

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