2000A&A...364..641Z

Query : 2000A&A...364..641Z

2000A&A...364..641Z - Astronomy and Astrophysics, volume 364641-645 (2000/12-2)

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

ZHILYAEV B.E., ROMANYUK Y.O., VERLYUK I.A., SVYATOGOROV O.A., KHALACK V.R., SERGEEV A.V., KONSTANTINOVA-ANTOVA R.K., ANTOV A.P., BACHEV R.S., ALEKSEEV I.Y., CHALENKO V.E., SHAKHOVSKOY D.N., CONTADAKIS M.E. and AVGOLOUPIS S.J.

Abstract (from CDS):

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.

Abstract Copyright: ∼

Journal keyword(s): stars: flare - stars: oscillations - stars: individual: EV Lac

CDS comments: Flare star 'Cl Melotte 22 2411' is in Pleiades, not in Hyades.

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
2 V* II Tau PM* 03 49 43.2760877136 +24 19 04.494227808   15.798 14.185 14.021   M4.6V 87 0
3 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
4 V* AD Leo PM* 10 19 36.2808181226 +19 52 12.010446571   10.82 9.52 9.19   dM3 1469 1
5 V* EV Lac PM* 22 46 49.7312610268 +44 20 02.374381562   11.85 10.26 9.89   M4.0Ve 993 2

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