Noyaux actifs de galaxie

Noyaux actifs de galaxie

Author: Françoise Combes

Publisher: ISTE Group

Published: 2023-07-18

Total Pages: 340

ISBN-13: 1789480876

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Pratiquement toutes les galaxies hébergent un trou noir supermassif en leur centre. Ces trous noirs croissent en masse en symbiose avec leur galaxie hôte et modèrent leur formation d’étoiles. Lorsque la matière est entraînée vers le noyau de la galaxie, un disque d’accrétion se forme, où le moment cinétique est transféré vers l’extérieur. Une énergie considérable est libérée lorsque la matière tombe dans le trou noir : c’est le phénomène des noyaux actifs de galaxie (AGN). Un noyau peut briller mille fois plus que la galaxie entière avec ses 200 milliards d’étoiles. L’activité nucléaire peut prendre de nombreuses formes, des quasars très puissants aux galaxies de Seyfert plus ordinaires, en passant par les radio-galaxies, qui peuvent lancer des jets jusqu’à dix fois le rayon de la galaxie. Noyaux actifs de galaxie examine toutes ces manifestations et présente une vue unifiée des AGN. Lorsque deux galaxies fusionnent, un trou noir binaire se forme et les deux trous noirs spiralent l’un vers l’autre pour fusionner, émettant des ondes gravitationnelles détectables par le futur satellite LISA.


Literature 1982, Part 2

Literature 1982, Part 2

Author: Siegfried Böhme

Publisher: Springer Science & Business Media

Published: 2013-11-09

Total Pages: 857

ISBN-13: 3662123371

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Astronomy and Astrophysics Abstracts, which has appeared in semi-annual volumes since 1969, is devoted to the recording, summarizing and indexing of astronomical publications throughout the world. It is prepared under the auspices of the International Astronomical Union (according to a resolution adopted at the 14th General Assembly in 1970). Astronomy and Astrophysics Abstracts aims to present a comprehensive documenta tion of literature in all fields of astronomy and astrophysics. Every effort will be made to ensure that the average time interval between the date of receipt of the original literature and publication of the abstracts will not exceed eight months. This time interval is near to that achieved by monthly abstracting journals, compared to which our system of accumu lating abstracts for about six months offers the advantage of greater convenience for the user. Volume 32 contains literature published in 1982 and received before February 11, 1983; some older literature which was received late and which is not recorded in earlier volumes is also included. We acknowledge with thanks contributions to this volume by Dr. J. Bou~a, Prague, who surveyed journals and publications in Czech and supplied us with abstracts in English.


Notions fondamentales de physique

Notions fondamentales de physique

Author: Jean Massicot

Publisher: Lulu.com

Published: 2010-02-19

Total Pages: 590

ISBN-13: 1445298554

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Une approche des principales notions permettant de mieux comprendre l'astrophysique actuelle et les mystères de l'Univers


Literature 1991, Part 2

Literature 1991, Part 2

Author: Astronomisches Rechen-Institut

Publisher: Springer Science & Business Media

Published: 2013-06-29

Total Pages: 1592

ISBN-13: 3662123762

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"Astronomy and Astrophysics Abstracts" appearing twice a year has become oneof the fundamental publications in the fields of astronomy, astrophysics andneighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. The abstrats are classified under more than a hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and important publication for all students and scientists working in the fields of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world.


Report

Report

Author: European Southern Observatory

Publisher:

Published: 1993

Total Pages: 430

ISBN-13:

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