Star Formation
Originally presented by Larry Bogan - to the Minas Astronomy Group - Nov, 1999
Overview of Star Formation
- Interstellar Material - Gas and Dust
- Properties of Interstellar Material
- Types of Gas Clouds
- Examples and Location of Gaseous Nebulae
- Collapse of Interstellar Clouds
- Classical Theory of Gas Cloud Collapse - Jean's Length and Mass
Some Early 20th Century Astronomy History
- Effect of Magnetic Fields on Collapse
Magnetic fields energy acts like an internal pressure that retards the collapse of clouds. Ionized gas orbits the magnetic lines of force and two move together. This delays the collapse
and force the cloud to be bigger in order to collapse
- Modern Theory of Collapse
Large Masses
Small Masses
- Protostar Formation
- Evolution to T-Tauri Star
- Deuterium Burning
- Classical T-Tauri
Accretion Disk
Jets
Theory of Operation
- Weak Line T-Tauri (Clearing of Accretion Disk)
- Images of Celestial Star Formation (Dark Clouds through T-Tauri Stars)
- Hayashi Track on the HR Diagram (Formation of a Stable Star)
- Collapse and Increase in temperature
- Ignition of thermonuclear reaction in the core
- Main Sequence of HR Diagram