PHYS 432/532 Cosmology (2020)

Welcome to Cosmology! Cosmology is the study of the universe taken as a whole. In this class, we will explore the range of possible universes -- how they are born, how they evolve, distance and time-scale within them, and how they might end. We will also look at our universe in particular. What are the parameters that govern our universe? How do we measure them? How is our universe ``fine-tuned'' to allow for life as we know it?

This is a not terribly exciting webpage for our incredibly exciting cosmology course this winter. I'll post all sorts of things here, like links, images, homework assignments (should you be foolish enough to miss the classes in which I hand them out), and announcements.

[Course Information] [Announcements] [Material and Links]

Course Information

Syllabus - Ver. 2/14/20

Instructor:
Prof. Dave Goldberg (goldberg@drexel.edu)
Office: Disque Hall Room 810
Phone: x2715
Office Hours: W 2-3, F 1-2, or by appointment in advance

Grader:
Mr. Joseph Fabritius (jmf399@drexel.edu)
Office: Disque Hall Room 808

Lecture:
MW, 9:30am-11am, Disque 919

Textbook:
Introduction to Cosmology, 2nd edition. By Barbara Ryden.
I will also supplement with handouts as needed.

Announcements

  • On Wednesday, February 12 we will have our midterm exam during the regular class period. The exam will be comprehensive and will include everything discussed in class up to and including material from February 9 (but primarily the first 4 topics, and everything on the first 3 homeworks).

    I also strongly recommend you read Ryden Chapters 1-7. Some of the more important topics we've covered include:

    • The Cosmological Principle
    • The Friedmann Equation
    • Cosmological Models
    • Comoving, proper, angular, and luminosity distances
    • Observations in a curved universe
    • Cosmological tests
    • Measuring fundamental parameters (how? what they mean? what are the accepted values?)

      This list is not comprehensive. The exam will consist of 3-4 problems similar in style to those I've given you on the homework. As a help, please take a look at some old exams:

    • [2018 Midterm] -- [Solution Key]
    • [2016 Midterm] -- [Solution Key]
    Except for the equation sheet, below, the exam will be entirely closed book. You may bring a calculator, but are expected to use it only for basic arithmetic (addition, subtraction, multiplication, division) only.
  • [Midterm Solution Key]
  • On Tuesday, March 17, 2020, 8-10am, we will have our final exam in PISB 106. The exam will be comprehensive, and include everything in class. We have covered material from Chapters 1-12 in Ryden.

    Since the midterm, some of the more important topics we've covered include:

    • The History of the Universe
    • The Early Universe
    • Structure formation
      • Inflation
      • Linear Evolution
      • The CMB
      This list is not comprehensive. The exam will be of similar length to the midterm (which was a little on the long side for a midterm). To help you prepare, look at some old exams:
    • [2018 Final] -- [Solution Key]
    • [2016 Final] -- [Solution Key]
    Except for the equation sheet, below, the exam will be entirely closed book. You may bring a calculator, but are expected to use it only for basic arithmetic (addition, subtraction, multiplication, division) only.

Materials and Links

Homework Assignments

25%

Slides, Supplementary Links, Papers, and Data

  • 2/5/20: Kolb and Turner pg. 89-91 -- A discussion of the thermodynamics of Proton/Neutron ratios.
  • Links