4.2 Astro 1 Section 1 Professor Brandt

4.2 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Astro 1 Section 1 Professor Brandt Friday April 2nd 1999 Announcements: Lecture notes: Class 33 Review Cosmic Microwave Background from a time when Universe was a hot dense plasma soup. T was about 3000K age was about 300 000 years as photons fly across Universe they are stretched in wavelength by expansion of space so are cooler today. good evidence for Big Bang model - predicted to have a precise blackbody shape and COBE confirmed this. COBE made a sensitive map of the temperature of the cosmic microwave background for all positions on the sky = isotropic. The microwave background is remarkably smooth to 1 part in 400. Then you see a dipole anisotropy = systematic differences in the temperature due to the motion of the Earth through space. Doppler effect - blueshift redshift. If you take out the dipole anisotropy you can look further for other structure - at a level of 1 in 50 000. See Galactic contamination and intrinsic anisotropy in the cosmic microwave background due
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/20/2008 for the course ASTRO 1 taught by Professor Brandt during the Spring '99 term at Pennsylvania State University, University Park.

Page1 / 3

4.2 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online