On the Fragment Mass Scale of Primordial Gas Clouds : Effect of Dark Matter Component
スポンサーリンク
概要
- 論文の詳細を見る
We discuss the evolution and the fragmentation of cylindrical gas clouds with primordial composition, using the virial equation. Comparing the timescalc of collapse with that of fragmentation, we obtain (lie fragment mass scale for the various initial density. We estimatethe minimum mass of a fragment that is formed from the primordial gas cloud. The massscale is essentially determined by the Chandrasekhar mass. The effect of dark matter is also investigated. If the filamentary cloud consists not only of ordinary gas but also some darkmatter, the fragmentation of the cylindrical cloud occurs at the lower density than the puregas case. As a result, the fragment mass scale hardly becomes Chandrasekhar mass scale. In this case, massive star formation is strongly expected.
- 2003-02-28
著者
-
Nishi Ryoichi
Department Of Physics Kyoto University
-
Nishi Ryoichi
Department Of Physics Niigata University
関連論文
- Thermal and Dynamical Evolution of Primordial Gas Clouds : On the Formation of First Luminous Objects
- The Thermal Evolution of the Postshock Layer in Pregalactic Clouds : Astrophysics and Relativity
- Kepler Rotation Effects on the Binary-Lens Microlensing Events
- Evolution of Primordial Protostellar Clouds : Quasi-Static Analysis
- The Fragment Mass Scale of the Primordial Gas Clouds. I : Non-Spherical Pressure-Free Collapse : Astrophysics and Relativity
- Photodissociative Regulation of Star Formation in Metal-Free Pre-Galactic Clouds
- On the Instability of Decelerating Shock Waves : Astrophysics and Relativity
- On the Fragment Mass Scale of Primordial Gas Clouds : Effect of Dark Matter Component
- Star Formation in the Primordial Gas : Overview
- Primordial Molecular Emission in Population III Galaxies
- H_2 Line Emission Associated with the Formation of the First Stars
- Microlensing and Halo Models of the Galaxy
- Back Reaction to the Spectrum of Magnetic Field in the Kinetic Dynamo Theory : Modified Kulsrud-Anderson Equation : Astrophysics and Relativity
- Expected EAGLE Event Rate towards the Magellanic Clouds
- Thermal and Dynamical Evolution of Primordial Gas Clouds : On the Formation of First Luminous Objects
- The Thermal Evolution of the Postshock Layer in Pregalactic Clouds : Astrophysics and Relativity
- Chapter 1 Star Formation in the Primordial Gas : Overview