**Phys 862 The Early Universe & Multimessenger Astrophysics (Winter 2020)**

**Instructor: **Prof. Aaron Vincent

**Meeting Times: **Mondays 13:30-14:20

Wednesdays 15:30-17:30

**Location:**Cyberspace

## Course Outline

- Intro/overview
- The smooth expanding Universe
- Thermodynamics and expansion
- Beyond equilibrium: Nucleosynthesis, Freeze-out, Recombination
- Cosmological perturbations
- Inflation
~~Cosmic rays and neutrinos~~- Dark matter detection
~~gravitational waves~~

## Assignments

Assignments are on holiday

## Grading rubrics for final project

Oral presentation

Written presentation

## Reading

S. Perlmutter, Supernovae, Dark Energy, and the Accelerating Universe

Pritchard & Loeb: 21 cm cosmology in the 21st century (summary due Jan 29th)

Boehm, Dolan, McCabe: Increasing Neff with particles in thermal equilibrium with neutrinos

Dodelson & Widrow: Sterile neutrinos as dark matter

Guth: The Inflationary Universe – Notes from our in-class discussion

Goodman and Witten: Detectability of certain dark matter candidates

## Notes

Lecture 1 slides

Part 1: Expansion, Thermodynamics (high-contrast version)

21 cm slides (Sarah Schon)

Part 2: Boltzmann Equation, BBN (high-contrast version)

Part 3: Cosmological perturbations I (high-contrast version)

Part 4: Perturbations II (high-contrast version)

Part 5: Perturbations III (“board” notes from online class)

Part 6: Inflation

Part 7: Dark matter slides

## References I will be drawing from

S. Dodelson, Modern Cosmology

E. Kolb and M. Turner, The Early Universe

V. Mukhanov, Physical Foundations of Cosmology

Sigl, Astroparticle Physics: Theory and Phenomenology

## Some online resources

Edmond Bertschinger’s Introduction to Tensor Calculus for GR

Antony Lewis’s Homepage (very nice Cosmology and EU notes)

Julien Lesgourgues’s TASI lectures on perturbations

LCDM Cosmology for Astronomers

Bayesian methods in Cosmology

## General Course Information

**Required text:** You are not required to purchase a textbook, but since I will be drawing most heavily on Dodelson, I recommend having a copy on hand. My handwritten course notes will be posted here semi-regularly.

### Prerequisites

There are no specific course prerequisites. Since this is a graduate course, you will be expected to have some background experience in special relativity, statistical mechanics and quantum mechanics.

### Evaluation

- 3-5 Problem sets (60%)
- 10% Participation in reading and discussion of selected papers. I’ll ask for a short summary + some questions in advance each time.
- 25% Final project + presentation
- 5% General participation in class (showing up…)