Results 151 to 160 of about 215 (165)

Investigation of flare activity of the red dwarf star EV Lac based on original observations and using the data from ground-based and space surveys

2022
The problem of energetics of flare activity of dwarf stars in the lower main sequence of the Hertzsprung-Russell diagram is relevant in the context of the detection of powerful flares (superflares) and the possibility of assessing such phenomena on the Sun in the past and future. A brief historical review of the EV Lac original researches is presented,
Shlyapnikov, A.A., Gorbachev, M.A.
openaire   +1 more source

Emission lines in the spectrum of the red-dwarf flare star EV Lac: Modeling of the quiescent chromosphere

Astronomy Reports, 2001
We present spectral observations of the red-dwarf flare star EV Lac made at the Crimean Astrophysical Observatory in 1994 and 1995, and describe a method for semi-empirical modeling of the chromospheres of red dwarfs based on their emission spectra.
E. A. Baranovskii, R. E. Gershberg, D. N. Shakhovskoi   +2 more
openaire   +1 more source

Spectral observations of red dwarfs II. New observations of flare stars in the Pleiades cluster region

Astrophysics, 1994
We studied the spectra of 24 flare stars of the Pleiades cluster region obtained on the 2.6m telescope of the Byurakan observatory in the years 1986–1989. From the spectral indices of titanium oxide (TiO) and other chemical elements of the stars investigated we determined their spectral classes and luminosities (absolute visual stellar magnitudes). The
L. V. Mirzoyan, V. V. Ambaryan, A. T. Garibdzhanyan   +2 more
openaire   +1 more source

Coordinated observations of the red dwarf flare star EV Lac in 1998

2019
The results of photometric studies of the flare star EV Lac obtained in the course of cooperative observations in 1998 are presented. No significant brightness variations in IR were found from simultaneous observations of the star in UBVRI and H bands, in coincidence with the observed optical flares.
Alekseev, I.Yu., Antov, A.P., Avgoloupis, S.J., Beskin, G.M., Borisov, N.V., Chalenko, V.E., Contadakis, M.E., Gershberg, R.E., Khalak, V.R., Konstantinova-Antova, R.K., Larionov, V.M., Panferova, I.P., Plokhotnichenko, V.L., Pustil???nik, L.A., Romanyuk, Ya.O., Seiradakis, J.-H., Sergeev, S.G., Svyatogorov, O.A., Verlyuk, I.A., Zhilyaev, B.E.   +19 more
openaire   +1 more source

Spectroscopic observations of red dwarfs I. Flare stars in the Pleiades

Astrophysics, 1991
L. V. Mirzoyan, V. V. Ambaryan, A. T. Garibdzhanyan   +2 more
openaire   +1 more source

Red Dwarfs/Flare Stars

2004
openaire   +1 more source

Detection of a giant white-light flare on an L2.5 dwarf with the Next Generation Transit Survey

Monthly Notices of the Royal Astronomical Society: Letters, 2019
Daniel Bayliss, Liam Raynard, Richard West   +2 more
exaly  

The habitability of planets orbiting M-dwarf stars

Physics Reports, 2016
Aomawa L Shields, John Asher Johnson
exaly  

Flares of red dwarf stars and the galactic X-ray background

Astrophysics and Space Science, 1976
N I Shakhovskaya
exaly  

Microwave observations of red dwarf flare stars

2005
White S M, Kundu M R
exaly