Flares and Flashes: Proceedings of the Iau Colloquium No. 151, Held in Sonneberg, Germany, 5-9 December 1994

ISBN-13: 9783662140086 / Angielski / Miękka / 2014 / 477 str.

Jochen Greiner; Hilmar Duerbeck; Roald E. Gershberg

Opis

The contributions to the 151st IAU Colloquium cover different fields of recent research, observational as well as theoretical, on solar and stellar flares ranging from radio up to gamma-ray wavelengths. A special chapter is devoted to all-sky monitoring and, finally, the excerpts of a round-table discussion present the reader with an interesting outlook on future developments. This book is therefore a unique source for those who want to get a complete picture of this fascinating part of modern astrophysics.

Spis treści

Solar flares.- Flares: The solar-stellar connection.- Radio emission from flares in single late-type stars.- High-resolution dynamic spectrum of a spectacular radio burst from AD Leonis.- VLBI observations of flares in RS CVn binary systems.- Coherent radio bursts from RS CVn binaries.- Systematic radio-observations of UX Arietis: Analysis of its variability.- Radio flares in HR 1099 (V711 Tau).- Sunspot proper motion and flare frequency.- Optical flares: Observations and interpretations.- The red dwarf star population in the galaxy.- Kinematics and ages of UV Ceti stars.- Flare activity among nearby stars.- Young and old subsystems of flare stars.- Flare activity and cluster membership probability of flare stars.- New EUV selected flare stars.- Flare stars in a field near the North Galactic Pole: ROSAT and optical observations.- Some results of the coordinated observations of the red dwarf flare star EV Lac in 1986–1994.- A possible discovery of a flaring 1012 eV gamma-ray source near the red dwarf EV Lac.- Short-time flare events of EV Lac.- Observations of high-frequency activity of EV Lacertae.- Spectral and photometrical investigation of EV Lac in different states with high time resolution.- Photoelectric observations of AD Leo: 1989–1994.- Multifrequency analysis of a UV Ceti flare on 1991 December 31.- A large amplitude flaring dMe star in the 1978 October 6B ?-ray burst error box.- A major optical flare on the recently discovered X-ray active dMe star G102-21.- Flares detected on some late giants: Are they real?.- BD+47°819, an A-type flare star with peculiar spectrosopic variatons.- The long-term behaviour of BY Dra.- CN Com: a typical RS Canum Venaticorum star.- A long-duration pre-flare dip in the light curve of V1054 Oph.- Photometric research of pre-flare and extra-flare activity of flare stars.- Stream parameters in the neighbourhood of the L 1 point in W serpentis-type binaries.- Monitoring of flare stars at nainital observatory.- CCD monitoring of flare stars in stellar aggregates.- Automated search for flare stars continued.- Flare stars database: Present status.- Flare star observations with a single-photon counting imaging detector.- Optical observations on milli-, micro-, and nanosecond timescales.- MANIA complex — hardware and software for the investigation of optical variability on time scales 10?7-102s.- A new technique for precise stellar photometry: Application to small-scale activity of EV lacertae.- Flare in late-type stars: UV.- Post-flare coronal activity on AU Mic detected by EUVE.- Flares in late-type stars: X-ray.- Short-duration X-ray transients observed with WATCH on Granat: Are some of them related to stellar flares?.- ROSAT observation of a giant X-ray flare on the active binary Algol.- ASCA X-ray spectra of quiescent and flaring emission from AB Doradus.- X-ray variability of the flare star CC Eri.- X-ray observations of the dMe star EQ1839.6+8002 in 1980–1993.- Physical processes during impulsive solar and stellar flares.- The role of flare stars in cosmic-ray origin.- Flare activity in Algol-type binaries.- Influence of coronal mass ejections from the red dwarf component on the accretion pattern in CVs and LMXBs.- Magnetic field reconnection as a possible source of nonthermal processes in accreting relativistic systems.- Flares in T Tauri stars.- Properties of X-ray flares on young stars.- X-ray flare rate of T Tauri stars in Taurus.- Middleterm flares in T Tau stars of the Tau — aur complex.- Activity on T Tauri stars.- A very active T Tauri star in NGC 7129.- Polarimetric outbursts in young herbig Ae/Be stars and in peculiar B[e] stars.- Photometric behaviour of the EXors V1118 Orionis and V1143 Orionis.- Observations of short-term dips in the Orion variables DD Serpentis and AB Aurigae.- Hydrogen and helium flashes in cataclysmic variables.- PU Vul: 15 years of studies, important findings and remaining mysteries.- Spectral variability and photometric behaviour of the symbiotic nova PU Vul in 1985–1994.- Photometry of CH Cygni during 1991–1994.- Long-term photometry of the symbiotic star AG Draconis.- Space densities of cataclysmic variables and nova recurrence times.- Extension of the radio spectrum of AE Aqr to the sub-millimetric range.- The origin of flaring activity in AE Aquarii.- UBVRI photometry of AE Aquarii in July–August 1994.- Flares and flickering in the cataclysmic variable AE Aquarii.- Time dependence of the UV resonance lines in the cataclysmic variable star VW Hyi.- The benefit of archival research in investigating dwarf novae.- Do we see magnetic effects in dwarf nova outbursts?.- Flares in dwarf novae.- Flickering in cataclysmic variables: Inventory and perspectives.- Resolved shot noise in the AM Her system V834 Cen.- Eclipse mapping the flickering in HT Cas.- Multiple time scales in cataclysmic variables: The examples.- X-ray bursts.- Strong X-ray bursts with expansion: Oscillations due to sound waves in atmospheres.- Quasi-periodic oscillations and noise in accreting black holes and low-magnetic field neutron stars.- Detection of nonthermal optical flashes with 10?3-10?1 s duration from some LMXBs.- TTM observations of X1755-338.- Irregular X-ray variation of LMC X-3.- Gamma-ray bursts: Observational overview, searches for counterparts, and BACODINE.- Observations of ?-ray bursts and solar flares with Granat.- Observations of high-energy gamma-ray bursts with EGRET.- Population of short ?-ray bursters — result of gravitational lensing of “quiet” ?-ray sources in remote galaxies.- Multi-wavelength flashes from GRBs.- Optical transients.- Simultaneous optical/gamma-ray observations of GRBs.- ETC observations of the gamma-ray burst GRB 941014.- Deep search for optical counterparts of gamma-ray bursters.- CCD sky monitoring and burst alert.- The plate collection at the Harvard College Observatory.- Optical sky monitoring: Past and future.- The Odessa Sky Patrol plate collection.- Nova Patrol at Abastumani.- Wide-field plate database: A progress report.- GCVS problems with flare stars.- Detections of neutron stars in the extreme ultraviolet.- Time variability studies with ROSAT.- Wide-field cameras for GRB observations in X-rays and EUV.- Wide-field X-ray optics.- Flares and flashes: The future.- After dinner address.- Resolution.

O autorze

The book (IAU Colloquium 151) covers different fields of research on solar and stellar flares ranging from radio up to gamma-ray wavelengths. It contains a special chapter on all-sky monitoring as well as excerpts of a roundtable discussion with an interesting outlook on future developments. Researchers and graduate students will get a complete picture of this part of modern astrophysics.