# Relativistic Astrophysics and Cosmology

From AstroBaki

Elements of general relativity. Physics of pulsars, cosmic rays, black holes. The cosmological distance scale, elementary cosmological models, properties of galaxies and quasars. The mass density and age of the universe. Evidence for dark matter and dark energy and concepts of the early universe and of galaxy formation. Reflections on astrophysics as a probe of the extrema of physics.

### Logistics

- Syllabus
- Class Repository: http://github.com/AaronParsons/astro161
- BCourses: [1]
- Main Text: Ryden, "Introduction to Cosmology" 2nd Ed. (The 1st Ed. is good, but out of date.)

## Topics by Date

### The Smooth Universe

#### Lecture 1: The Cosmological Principle; Hubble parameter H; scale factor a [Ch 1,2]

- Topics
- Cosmological Principle, intro to our universe
- Hubble's Law
- Scale Factor
- Relativity Review

- class mechanics
- syllabus
- references
- tools for figuring stuff out
- theoretical derivation
- order-of-magnitude estimation
- physical intuition (hands-on modeling, analogies)
- numerical simulation/programming

#### Lecture 2: Friedmann equation; equation of state; radiation, matter, dark energy [Ch 3,4,5]

- Topics
- Problem Set 1, due 1/29, 4pm

#### Density parameter Omega; open, flat, closed cosmological models [Ch 6]

#### Time evolution of H, Omega, and a [Ch 7]

- Topics
- Problem Set 2, due 2/5, 4pm

#### Rudiments of general relativity; the Robertson-Walker metric [Ch 8, A1]

#### Basic kinematic properties: distance-redshift, time-redshift, age, angular sizes [A2]