Donate

Gershberg Roald Evgenevich - Solar-type activity in main-sequence stars


Author : Gershberg Roald Evgenevich
Title : Solar-type activity in main-sequence stars
Year : 2005

Link download : Gershberg_Roald_Evgenevich_-_Solar-type_activity_in_main-sequence_stars.zip

Preface. Over the last decades our insight into the realm of stars was deepened considerably by many outstanding discoveries: pulsars, neutron stars predicted in the 1930s; discrete X-ray sources, stellar systems with much stronger X-ray emission than optical luminosity; maser emission related to the early stage of stellar evolution and to some oscillating supergiants that have reached an advanced evolutionary stage; intense outflow of matter from hot stars, etc. Parallel to these discoveries, which are mainly due to progressing methods of astrophysical observations, the comprehension of many stellar events improved markedly. The spectra of supernovae were successfully interpreted and the hydrodynamic theory of flares on them was elaborated. The theory of stellar evolution in binary systems yielded the concept of mass exchange as a decisive factor of their evolution and gave a key to understanding the activity of a wide family of novae, symbiotic and cataclysmic systems. As a result of the development of the evolution theory of early spectral-type stars, oscillating cepheids – the lighthouses of the Universe that were used to determine distances to different stellar systems – had become space-time references of the development of such systems. As compared to these impressive findings for extremely interesting but rather rare types of stars, which attract the attention of astronomers of all specialties and not only astronomers, the study of very faint and cool variable dwarfs – UV Cet-type flare stars – might seem too narrowly specialized. However, successful investigation of these stars changes essentially the general concepts of the “stellar kingdom”. During the last decades it became clear that, first, flare dwarfs make up the most abundant type of stars and, secondly, their activity, being of the same physical nature as solar activity, plays a major role among lower main-sequence stars. ...

837 lectures

Voir aussi

News - Nouvelles

Les mises à jours sont uniquement accessibles aux donateurs. Pour faire un don veuillez vous rendre...

Lire la suite

Dewalque Marc - La lecture du levain au XVIIIème siècle

Auteur : Dewalque Marc Ouvrage : La lecture du levain au XVIIIème siècle (dit le siècle des...

Lire la suite

Levrouw Fanny - Drochon Laureline - Les maisons des semences paysannes

Auteurs : Levrouw Fanny - Drochon Laureline Ouvrage : Les maisons des semences paysannes Regards...

Lire la suite

Mulot Marie-Antoinette - Rousselet-Blanc Pierre - Soignez vos animaux par les plantes

Auteurs : Mulot Marie-Antoinette - Rousselet-Blanc Pierre Ouvrage : Soignez vos animaux par les...

Lire la suite

Kurtness Manuel Kak'wa - Pachamama Cuisine des premières nations

Auteur : Kurtness Manuel Kak'wa Ouvrage : Pachamama Cuisine des premières nations Année : 1968 Lien...

Lire la suite

Beauchet Patrick - La cuisine du gibier

Auteur : Beauchet Patrick Ouvrage : La cuisine du gibier Mes recettes de chefs Année : 2014 Lien de...

Lire la suite




ARYANA LIBRIS
Aryana Libris
Recension d'ouvrages au format numérique PDF