Results 131 to 140 of about 4,318,459 (158)
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Microwave Observations of Red Dwarf Flare Stars
Advances in Space Research, 1986Abstract We discuss some recent observations of red dwarf flare stars. When observed over periods of about 8 hours, each of 4 flare star systems displayed at least one major flare at 20 cm. Quiescent emission at 6 cm was seen from UV Ceti and EQ Peg A, but flares were much less frequent at 6 cm than at 20 cm. We also summarize earlier observations of
M R Kundu
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Environmental Effects of Flares From Red Dwarf Stars
International Journal of Modern Physics E, 2011We examine some environmental effects appearing on exoplanets in the habitable zone of red dwarfs, during the first billion years of the star evolution. We focus on the radiative perturbation that the frequent stellar flares would cause on the planet surface and down the assumed planetary ocean, with some insight on the affectation of potential life ...
Osmel Martín, Rolando Cárdenas
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Interferometric Observations of Weak Radio Flares From a Red Dwarf Star
Nature, 1978MEASUREMENT of the radio emission associated with flares on M-type red dwarf stars has been difficult because of the sporadic and transient nature of the phenomena, and the danger of confusion with terrestrial sources of emission. The existence of detectable radio emission from the flares was first established by integration and correlation with the ...
Bernard Lovell, R E Spencer, R J Davis
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Coordinated Observations of the Red Dwarf Flare Star EV LAC in 1994 and 1995
Astronomical and Astrophysical Transactions, 1998Abstract The results of photometric, spectral and radio studies of the flare star EV Lac we obtained during the course of cooperative observations in 1994 and 1995 are presented. A quantitative analysis of the radiation emitted by two powerful flares using the colour-colour diagram confirms the previous conclusion on the essential heterogeneity of ...
R E Gershberg, I Yu Alekseev, M Rodonò
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Photometric Study on Stellar Magnetic Activity. I. Flare Variability of Red Dwarf Stars in the Open Cluster M37 [PDF]
Astrophysical Journal, 2015 28 pages, 21 figures, 7 tables, Accepted for publication in ...
Joel D. Hartman, Y -I Byun
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Double-Peaked Flare Events on Red Dwarf Stars and Solar ‘Sympathetic’ Flares [PDF]
Symposium - International Astronomical Union, 1976 About 50% of the flare events observed on red dwarfs are at least double-peaked. As the majority of flare stars are members of double or multiple systems, the possibility that time-overlapping flares originate quasi-simultaneously on the individual components is discussed.Assuming a poissonian occurrence of flares in both components, the expected ...
M Rodonò
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Some Results of the Coordinated Observations of the Red Dwarf Flare Star EV Lac in 1986–1994 [PDF]
Lecture Notes in Physics, 1995 In 1986-94 a series of coordinated monitorings for the flare star EV Lac has been performed. The observations were aimed to collect homogeneous data on the star both in its active and quiet states, to study its flares and starspots. These photometric patrols were accompanied by monitorings of EV Lac of different other kinds: polarimetric, spectral ...
R E Gershberg
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Narrow-Band Radio Flares From Red Dwarf Stars
Astrophysical Journal, 1986 VLA observations of narrow-band behavior in 20 cm flares from two red dwarf stars, L726 - 8A and AD Leo, are reported. The flare on L726 - 8A was observed at 1415 and 1515 MHz; the flux and the evolution differed significantly at the two frequencies. The flare on AD Leo lasted for 2 hr at 1415 MHz but did not appear at 1515 MHz.
Stephen M. White +2 more
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Astrophysical Journal, 1999 Extreme Ultraviolet Explorer (EUVE) observations of the long-duration 1992 July 15-17 flaring event on the red dwarf star AU Mic are discussed. The flare was detected in the EUVE Deep Survey (DS) Lexan/B band (65-190 A) and was made up of a large impulsive event corresponding to an increase in the extreme ultraviolet (EUV) emission by a factor of 15 ...
Jeremy J. Drake +2 more
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Emission lines of the red-dwarf flare star EV Lac: Stellar flares
Astronomy Reports, 2001We present equivalent widths and profiles for Hα Hβ, Hγ and He I λ4471 A emission lines obtained in observations of the flares of EV Lac made at the Crimean Astrophysical Observatory in 1994 and 1995. Our semi-empirical modeling of the flares gives insight into the structure of the emitting regions, including a temperature plateau, and also into the ...
É. A. Baranovskii +2 more
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