## Admission requirements

Leiden Astronomy Bachelor's courses Galaxies and Cosmology and Radiative Processes.

## Description

This course introduces the theoretical underpinnings and the observational evidence for modern cosmology.

After you learn what evidence exists for the hot Big Bang model, you study the basics of relativistic cosmology. We then discuss the physical processes occurring in the early universe, such as inflation, Big Bang nucleosynthesis and recombination. Finally, you will study the origin of large-scale structure, and use this to interpret the observations of the Cosmic Microwave Background. During the exercise classes, you will apply the material covered in the lectures in more involved calculations.

This course covers the following topics:

Relativistic cosmology (Friedmann equation, distances, basic parameters)

Thermal history of the Universe

Inflation

Big Bang nucleosynthesis

Recombination

Basics of structure formation

Interpretation of the Cosmic Microwave Background

## Course objectives

Upon completion of this course you will be able to describe the current cosmological model and the observational evidence supporting this. Moreover, you will be able to make basic calculations and read the scientific literature on the topic.

Upon completion of this course you will be able to:

Explain the basics of the current cosmological model

Use the Friedmann equations to calculate basic quantities in an expanding Universe

Explain the problems with the Big Bang models

Explain how inflation solves the problems with the Big Bang model

Explain the basics of Big Bang nucleosynthesis

Interpret observations of the Cosmic Microwave Background

## Soft skills

In this course, you are trained in the following behavior-oriented skills:

Abstract thinking

Explaining and analyzing complex and non-intuitive concepts

## Timetable

See Astronomy master schedules

## Mode of instruction

Lectures

## Assessment method

Written exam: 80%, see the Astromoy master examination schedules

Three homework assignments: 20% (if higher than result of written exam)

## Blackboard

Blackboard is not used for this course.

## Reading list

Optional, not required because the lecture notes will be made available as well:

An Introduction to Modern Cosmology (A. Liddle), ISBN 9780470848357

*(basic introduction to cosmology)*Introduction to Cosmology (B. Ryden), ISBN 9781292039718

*(somewhat more substantial)*Cosmology: The Origin and Evolution of Cosmic Structure (P. Coles and F. Lucchin), ISBN 9780471489092 (

*more advanced topics)*

## Registration

Register via uSis. More information about signing up for classes and exams can be found here. Exchange and Study Abroad students, please see the Prospective students website for information on how to register. For Interest only & Contractual enrolment, please see this website (in Dutch only).

## Contact information

Lecturer: Dr. R.J. (Rychard) Bouwens

Assistant: Anna De Graaff

## Remarks

None