PPT Slide
The Experiment: To find the first galaxies
- Understand basic properties of star formation/galaxies ? guess how a young galaxy, or protogalaxy would appear
- Consider also HST deep field observations.
- New stars very blue: will appear redder at large distances (redshift).
- Dust protects gas from radiation. Dust is heated and is luminous at infrared wavelengths.
- Main raw material is hydrogen.
- Gas in close to a group of galaxies (cluster) may become very hot and emit X-rays.