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portada heating versus cooling in galaxies and clusters of galaxies: proceedings of the mpa/eso/mpe/usm joint astronomy conference held in garching, germany,
Type
Physical Book
Illustrated by
Publisher
Author
Year
2010
Language
English
Pages
445
Format
Paperback
Dimensions
23.4 x 15.6 x 2.4 cm
Weight
0.65 kg.
ISBN
3642092578
ISBN13
9783642092572
Categories

heating versus cooling in galaxies and clusters of galaxies: proceedings of the mpa/eso/mpe/usm joint astronomy conference held in garching, germany,

Hans Böhringer (Illustrated by) · Gabriel W. Pratt (Illustrated by) · Alexis Finoguenov (Illustrated by) · Springer · Paperback

heating versus cooling in galaxies and clusters of galaxies: proceedings of the mpa/eso/mpe/usm joint astronomy conference held in garching, germany, - Böhringer, Hans ; Pratt, Gabriel W. ; Finoguenov, Alexis

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Synopsis "heating versus cooling in galaxies and clusters of galaxies: proceedings of the mpa/eso/mpe/usm joint astronomy conference held in garching, germany,"

The Universe would be a dull and dark place if the gaseous baryons did not cool, collapse, and form stars and galaxies. However, if this gas is allowed to cool unimpeded at the rate predicted from known atomic physics, in the context of a well-established cosmological model, the gaseous matter would form stars and galaxies with a high e?ciency, so that far more than the observed fraction of about 10-15% of the baryonic matter would be found in luminous stellar systems. Therefore, cooling must be damped or regulatedby heating processes, and observations show that this 'feedback' is a widespread astrophysical phenomenon. The place where this cooling and feedback manifests itself most dram- ically is in the inner regions of the most massive Dark Matter halos found in our Universe, in the cores of galaxy clusters. The e?ect of cosmic co- ing in these objects was recognized in the mid-1970s, and the term 'cooling ?ow' was introduced by Andy Fabian and colleagues at Cambridge as a p- sible explanation of the physical processes obtained in the central regions of clusters. The name refers to the fact that gas cooling in the inner regions is associated with a loss of central pressure, causing an in?ow of hot gas from larger radii.

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