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Contents
Contents
Star Formation
0
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1
Kohji Tomisaka
National Astronomical Observatory Japan
Copyright ©2001-2009 by Tomisaka, K.
version 0.5: August 5, 2001
version 1.0: August 30, 2001
version 2.0: November 8, 2003
version 3.0: June 1, 2004
version 4.0: Oct. 29, 2007
version 5.0: Dec. 9, 2009
Contents
Introduction
Interstellar Matter
Case Study -- Taurus Molecular Clouds
T Tauri Stars
Disk Frequency
Spectral Energy Distribution (SED)
Protostars
B335
L1551 IRS 5
Infall Motion
Optical Jet
L 1544: Pre-protostellar Cores
Rotation of Outflow
Magnetic Fields
Prestellar Core
Cores with Protostars
Bok Globules
Magnetic Field
1000AU Scale
T Tauri Disks
Density Distribution
Mass Spectrum
Line Width - Size Relation
Physical Background
Basic Equations of Hydrodynamics
The Poisson Equation of the Self-Gravity
Problem
Free-fall Time
Problem
Problem
Accretion Rate
Gravitational Instability
Linear Analysis
Sound Wave
Problem
Jeans Instability
Gravitational Instability of Thin Disk
Rotating Disk
Convective Instability
Super- and Subsonic Flow
Flow in the Laval Nozzle
Steady State Flow under an Influence of External Fields
Stellar Wind -- Parker Wind Theory
Virial Analysis
Radiative Transfer
Radiative Transfer Equation
Einstein's Coefficients
Spontaneous Emission
Absorption
Induced Emission
Collisional Excitation and Deexcitation
Relation of Einstein's Coefficients to Absorption and Emissivity
Relation between Einstein's Coefficients
Non-Local Thermal Equilibrium
Critical Density
Galactic Scale Star Formation
Schmidt Law
Global Star Formation
Local Star Formation Rate
Star Formation Seen with Akari
Distributions of Atomic and Molecular Hydrogen
Gravitational Instability of Rotating Thin Disk
Tightly Wound Spirals
Toomre's
Value
Spiral Structure
Density Wave Theory
Group Velocity
Galactic Shock
Local Star Formation Process
Hydrostatic Balance
Problem 1
Problem 2
Bonnor-Ebert Mass
Equilibria of Cylindrical Cloud
Virial Analysis
Magnatohydrostatic Clouds
Subcritical Cloud vs Supercritical Cloud
Observation of Magnetic Field Strength
Zeeman Splitting Method
Chandrasekhar-Fermi Method
Observation of Mass-to-Flux Ratio
Ambipolar Diffusion
Ionization Rate
Ambipolar Diffusion
Dynamical Collapse
Inside-out Collapse Solution
Protostellar Evolution of Supercritical Clouds
Star Formation Time Scale
Accretion Rate
Problem
Outflow
Magneto-driven Model
Problem
Angular Momentum Transfer
Centrifugal Radius
Entrainment Model
Evolution to Star
Isothermal Phase
First Core
Second Collapse
Second Core
Example of Numerical Simulation
Evolution in the H-R diagram
Main Accretion Phase
Before Deuterium Ignition
After Deuterium Ignition
Premain-sequence Evolution
Bibliography
Basic Equation of Fluid Dynamics
What is fluid?
Equation of Motion
Lagrangian and Euler Equations
Continuity Equation
Expression for Momentum Density
Energy Equation
Polytropic Relation
Energy Equation from the First Law of Theromodynamics
Shock Wave
Rankine-Hugoniot Relation
Isotharmal shock
Basic Equations of Magnetohydrodynamics
Magnetohydrodynamics
Flux Freezing
Basic Equations of Ideal MHD
Axisymmetric Case
Hydrostatic Equilibrium
Polytrope
Magnetohydrostatic Configuration
Basic Equations for Radiative Hydrodynamics
Radiative Hydrodynamics
Random Velocity
About this document ...
Kohji Tomisaka 2009-12-10