<電子ブック>
Cooling Flows in Clusters and Galaxies

責任表示
著者
本文言語
出版者
出版年
出版地
関連情報
概要 X-ray astronomers discovered the diffuse gas in clusters of galaxies about 20 years ago. It was later realized that the central gas density in some clusters, and in elliptical galaxies, is so high tha...t radiative cooling is a significant energy loss. The cooling time of the gas decreases rapidly towards the centre of the cluster or galaxy and is less than a Hubble time within the innermost few hundred kiloparsecs. This results in a cooling flow in which the gas density rises in order to maintain pressure to support the weight of the overlying gas. The rate at which mass is deposited by the flow is inferred to be several hundreds of solar masses per year in some clusters. The fraction of clusters in which cooling flows are found may exceed 50 per cent. Small flows probably occur in most normal elliptical galaxies that are not in rich clusters. The implications of this simple phenomenon are profound, for we appear to be witnessing the ongoing formation of the central galaxy. In particular, since most of the gas is undetected once it cools below about 3 million K, it appears to form dark matter. There is no reason why it should be detectable with current techniques if each cooling proton only recombines once and the matter condenses into objects of low mass.続きを見る
目次 Properties of Clusters of Galaxies
Clusters of Galaxies and Cooling Hot Gas
A Catalog(UE) of Cooling Flows
Alternative Cooling Flow Models
The Role of Heat Conduction in Cooling Flows
Einstein Observatory Solid State Detector Observations of Cooling Flows in Clusters of Galaxies
X-Ray Emission Lines from Cooling Flows
Optical, Ultraviolet, and Infrared Observations of Cooling Flows in Rich Clusters
Dynamics of Cosmic Rays in Cooling Flows
Hot and Cold Gas in Early-Type Galaxies: A Comparison of X-Ray, HI and Far Infrared Emission
Evidence for Star Formation in Cooling Flows
Dynamical Friction in the Rich Cluster A2029
Color Gradients in Cooling Flow Cluster Central Galaxies and the Ionization of Cluster Emission Line Systems
Ultraviolet Evidence for Star Formation in Elliptical Galaxies
Characteristics of Extended Gas Around Radio Galaxies
HI Absorption Detection in the Perseus Cooling Flow
Radio Observations of NGC 1275 at 90 and 20 cm
Photoionization Versus Shocks in the Filaments of NGC 1275
Cooling Flow Filaments and the Emission-Line Gas in NGC 1275
Exosat Data on Clusters
Thermal Instability in Cooling Flows
Radio Emission in Cooling Flows
Emission from Thermal Instabilities
Radio Sources and Cooling Flows
The Depolarization of Radio Sources by Cluster Gas
The Structure of Elliptical Galaxies
Dynamics of E Galaxies and Cluster Sources
Cooling Flows in Galaxies
Detailed Spectroscopic Investigation of Emission-Line Nebulae Associated with Cooling Flows
Jet-Induced Starbursts: from Minkowski's Object to Distant Radio Galaxies
Radio Jets as a Probe of the Cooling Flow Environment
Optical Emission Lines in Early-Type Galaxies
Radio and X-Ray Emission in Early-Type Galaxies
Ecology and Evolution of Ellipticals
Warm Gas in Radio Galaxies
Hell 4686/h/? as a Constraint on the Ionizing Continuum
Photoionization of Extended Emission Line Regions
The Evolution of Early-Type Galaxies
Some Implications of Distant Cooling Flows
Extended Emission-Line Gas in Distant 3CR Radio Galaxies
Cooling Flows around Quasars
A Semi-Analytic Approach to Cooling Flow Evolution
The Current Evolution of X-Ray Cluster Cooling Flows
Non-Steady Considerations for Cooling Flows
Cosmology and Cooling Flows
Multiphase Cooling Flows and Galaxy Formation
The Role of Magnetic Fields in Cluster Cooling Flows
HI in Cooling Flow Ellipticals
Discussion Papers
Object Index.
続きを見る
本文を見る Full text available from SpringerLink ebooks - Physics and Astronomy (Archive)

詳細

レコードID
主題
SSID
eISBN
登録日 2020.06.27
更新日 2020.06.28