Wolfgang Kundt Astrophysical Jets and Their Engines 9789027725486

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Автор: Wolfgang Kundt
Название: Astrophysical Jets and Their Engines
ISBN: 9789027725486
Издательство: Springer
Классификация:

Галактики и звёзды

ISBN-10: 9027725489
Обложка/Формат: Hardcover
Страницы: 256
Вес: 0.59 кг.
Дата издания: 31.07.1987
Серия: Nato Science Series C:
Язык: English
Размер: 243 x 167 x 22
Основная тема: Physics
Ссылка на Издательство: Link
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Поставляется из: Германии
Описание: This volume is the documentation of the first Course on Neutron Stars, Active Galactic Nuclei and Jets, of an Erice School with a wide astro- physical scope. The choice of the subject was made because of an apparent similari- ty - stressed already at earlier meetings - of four classes of astrophy- sical jet sources: Active Galactic Nuclei, Young Stellar Objects, Binary Neutron Stars and Binary White Dwarfs. They share important properties such as their morphology, high variability and large veloci- ty gradients as well as - with some inference - their broad spectrum, hypersonic outflow and core/lobe power ratio. Despite this apparent similarity of the four source classes, quite different models have been put forward for their description: (i) The central engine of active galactic nuclei has been generally thought to be a black hole, in contrast to the central engine of young stellar objects and cometary nebulae which apparently is a pre-T-Tauri star, some six orders of magnitude less compact, and to the central engine of planetary nebulae which mayor may not be a binary white dwarf. (ii) The elongated lobes, or flow patterns, have been often interpreted as highly directional stellar wind outflows whereas in a few well- mapped cases, the elongated flow appears to be pumped up through a much narrower channel, or jet, both in the extragalactic and stellar sources.

Astrophysical Jets and Their Engines, Wolfgang Kundt