Results 161 to 170 of about 4,002,507 (183)

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

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

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
We present the detection of a V ∼ −10 flare from the ultracool L2.5 dwarf ULAS J224940.13−011236.9 with the Next Generation Transit Survey (NGTS). The flare was detected in a targeted search of late-type stars in NGTS full-frame images and represents one
Daniel Bayliss, Liam Raynard, Richard West   +2 more
exaly   +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

Flare stars and the evolution of red dwarf stars

, 1993
A. Mirzoyan
semanticscholar   +1 more source

Red Dwarfs/Flare Stars

2004
openaire   +1 more source

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

, 1976
R. E. Gersheberg, N. Shakhovskaya
semanticscholar   +1 more source

Atmospheric activity in red dwarf stars

, 1987
B. Pettersen
semanticscholar   +1 more source

Radio Emission from Flare Stars near the Orion Nebula

Nature, 1969
O. Slee, C. Higgins, C. Roslund, G. Lyngå   +3 more
semanticscholar   +1 more source