Activity in Cool Star Envelopes

Front Matter....Pages i-xiii
Stellar Magnetic Fields, Origin and Structure....Pages 1-12
Observational Constraints for Solar-Type Dynamos....Pages 13-20
The Development of Structure in Coronal Magnetic Fields....Pages 21-24
Stellar Magnetic Fields: Measurements and Diagnostics....Pages 25-37
A New Technique for the Measurement of Stellar Magnetic Fields: First Results....Pages 39-43
Multiwavelength Observations of Magnetic Fields and Related Activity on XI Bootis A....Pages 45-48
Atmospheric Activity in the Outer Envelopes of Cool Dwarf Stars....Pages 49-60
Radiation Losses in Chromospheric and Transition Region Emission Lines from AD Leo (dM4e)....Pages 61-64
Variation of the Flare Energy Spectrum during the Activity Cycle of the UV Cet-Type Stars....Pages 65-68
Statistical Photometry of Flare Stars in the Ultraviolet and Photographic Bands Provided New and Effective Physical Parameters Characterizing their Energetic Properties....Pages 69-72
Photographic Photometry and Statistical Investigation of Pleiades Flare Stars....Pages 73-76
B19 — A Flare Star in Front of the NGC 7000 Aggregate....Pages 77-78
IRAS Observations of Flare Stars....Pages 79-81
Spectroscopic Observations of X-Ray Selected Late Type Stars....Pages 83-86
Activity in Envelopes of T Tauri Stars....Pages 87-91
RY Lupi-A Pulsating T Tauri Star?....Pages 93-97
Deuterium Burning and Pulsational Instabilities in Pre — Main — Sequence Stars....Pages 99-103
Small Scale Stellar Surface Structures....Pages 105-106
Visible and Infrared Photometry of ER Vul....Pages 107-110
Spot Activity and Circumstellar Matter in II Peg....Pages 111-114
Magnetic Reconnection Models of Flares....Pages 115-124
Conditions for Transition from Quiescent to Active States in Stellar Atmospheres....Pages 125-142
Stellar and Solar Flares: Some Theoretical Problems from Point of View Modern Observations....Pages 143-152
Quasi-Static Evolution of a Force-Free Magnetic Field — Applications to the Theory of Stellar Flares and Coronal Heating....Pages 153-157
Flares: Magnetic or Convective Origin?....Pages 159-162
Simultaneous Optical and Infrared Observations of Stellar Flares....Pages 163-166
Coordinated Photometry, Spectroscopy and X-ray Observations of Flare Stars....Pages 167-170
Modeling of Long-Decay Stellar Flares on EQ Peg and Prox Cen....Pages 171-174
Spatially Resolved Flares in RS CVn Systems....Pages 175-178
Simultaneous Exosat and VLA Observations of the W UMa Binaries, VW Cep and XY Leo: A Flare on VW Cep....Pages 179-182
Models of Solar-type Coronae....Pages 183-193
Acceleration of Energetic Particles in Solar Flares....Pages 195-210
Effect of a Dense Coronal Region on Line Observations from Coronal Holes....Pages 211-214
Dynamic Nature of Coronal Heating as Inferred from Simultaneous, Observations of the Quiet Sun at 20 cm Radio and He I 10830 Å....Pages 215-218
Stellar X-ray Astronomy with ROSAT....Pages 219-229
Observing Cool Stars with the XUV Wide Field Camera on Rosat....Pages 231-236
On Solar and Stellar Coronal Models....Pages 237-240
Exosat Observations of RSCVn Stars....Pages 241-244
Densities and Heating of Coronae of the Active Late-Type Dwarfs....Pages 245-248
Exosat Observations of Quiescent and Flaring Emission from M Dwarf Flare Stars....Pages 249-252
X-ray Variability of dM Stars Observed by EXOSAT....Pages 253-256
Stellar Radio Emission....Pages 257-267
Radio Emission Processes Related to Solar Flares....Pages 269-281
Properties of Stellar Magnetospheres Deduced from Radio Observations of Close Binaries....Pages 283-288
VLA Observations of the X-Ray Bright Hyades M-Dwarfs....Pages 289-292
Radio Emission from Active Young Stars in the Rho Ophiuchi Cloud....Pages 293-296
Mass Loss Mechanisms for Cool Stars....Pages 297-308
Winds in Cool Stars....Pages 309-310
The Ultraviolet Variability Of Betelgeuse....Pages 311-316
Envelope Activity of the K-Type Supergiant HD 4817....Pages 317-320
Helium Lines Formation in T-Tauri Stars....Pages 321-324
X-Ray Observations of Solar Flares....Pages 325-340
Back Matter....Pages 341-351