9783540734833 - heating versus cooling in galaxies and clusters of galaxies: proceedings of the mpa/eso/mpe/usm joint astronomy conference held in garching, germany, 6-11 august 2006 (eso astrophysics symposia) (5 Ergebnisse)
Sprache: Englisch
Verlag: Berlin, Springer, 2007
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Hardcover. Zustand: Wie neu. XXIII, 444 S. : Ill. Like new. Shrink wrapped. Sprache: Englisch Gewicht in Gramm: 915.
Sprache: Englisch
Verlag: Springer, 2007
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Sprache: Englisch
Verlag: Springer, 2007
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Sprache: Englisch
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Zustand: Sehr gut. Zustand: Sehr gut | Seiten: 472 | Sprache: Englisch | Produktart: Bücher | 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.
Sprache: Englisch
Verlag: Springer, 2007
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Buch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - 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 c…osmological 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.
