Astronomy 123: Stellar Astrophysics

Archive of Assignments


Week 7

Read the seventh assignment [pdf] and solve the problems -- and also think about the more-than-usual un-numbered questions-for-discussion-in-seminar. Right now, I haven't designated any warmup problems, but I may early in the week designate one or two and also share a small amount of outside reading with you. You can read the random-walk text from OC [pdf], useful for problem Q0 (last week's un-discussed Q9).

Week 6

Read the sixth assignment [pdf] and solve the problems. A tiny bit of coding this week and three warmup problems. Be ready to discuss the reading, not just the problems, in seminar. Update: You can read the random-walk text from OC [pdf], useful for problem Q9.

Week 5

Read the fifth assignment [pdf] get ready to go over some of the radiation transport concepts we were introduced to last week and to solve some more problems! Update: For your convenience, the two stream approximation figure.

Week 4

In this week's seminar meeting and fourth assignment [pdf] we get into radiation transport. We'll be reading the first half of chapter 3; there are a couple of warm-up problem due on Thursday.

Week 3

In the third seminar meeting and third assignment [pdf] focus on star formation and several important physical principles and tools that we'll see later in the semester too (HSEQ, the virial theorem). There are a couple of warmup problems due on Thursday.

Week 2

In the second seminar meeting – the assignment [pdf] focuses on the physics of the spectral type in the second half of Ch. 1 of LeBlanc, supplemented by M. Richmond's lecture notes on stellar spectral classification. There are two warmup problems due on Thursday. The images of stellar spectra – B0 to O5 stars and different luminosity classes – demonstrate the variation of line properties across stars (see problems 6 and 7).

The four pages of questions and problems handed out in the last seminar [pdf] are something you should bring to seminar this week, ready to discuss and solve.

Week 1

Our first seminar meeting – and first seminar assignment [pdf] – will focus on the first half of Ch. 1 of LeBlanc. Note that the assignment includes a few pre-seminar "warm-up" problems (due at lunchtime on Thursday) as well as problems you'll present in our seminar meeting. The assignment also includes questions you'll think about ahead of time and makes some notes about and discuss in seminar but not hand anything in for.

The short reading from Ostlie and Carroll is available here as a pdf. As is problem 3.9 [pdf] from that textbook.

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This page is maintained by David Cohen
cohen -at- astro -dot- swarthmore -dot- edu

Last modified: March 16, 2019