Astronomy 123: Stellar Astrophysics

Archive of Assignments

 

Week 13

We'll review material, mostly in Ch. 6 this week, as described in assignment 13 [pdf].

As part of the assignment this week, look at the chart of nuclides and think about the information it's telling us: one chart and another. And Wikipedia.

Sign up to present a problem in Monday's seminar.

Week 12

We'll finish up the last two problems from this past week, and touch on a few of the topics from the first half of the chapter, and then move on the material in the second half of Ch. 6, as described in assignment 12 [pdf].

As part of the assignment this week, look at the chart of nuclides and think about the information it's telling us: one chart and another. And Wikipedia.

Week 11

We'll start by touching on three topics from last week and then move on to nuclear reactions and (the beginning of) stellar evolution (the first part of Ch. 6). Please take a look at assignment 11 [pdf]. The LeBlanc reading is supplemented this week with a few pages from Ostlie and Carroll on the pressure integral [pdf].

Week 10

We'll finish up stellar interiors this week (second half of Ch. 5). Please take a look at assignment 10 [pdf]. The LeBlanc reading is supplemented this week with a few pages from Ostlie and Carroll on polytropes and the Lane Emden equation [pdf].

Week 9

We'll start on stellar interiors this week (first half of Ch. 5), but we'll start Monday's seminar with students presenting solutions to the left-over problems from this week. Please take a look at assignment 9 [pdf].

Week 8

We'll finish up stellar atmospheres this week, finishing up chapter 4, guided by this assignment [pdf]. (Update 3/19: now with fixed x-axis tickmark labels on graph that's part of Q10.)

Week 7

More information about the midterm [pdf] is available.

No assignment currently, except studying for the in-class midterm on Monday the 13th.

Week 6

We will start chapter 4 this week – on stellar atmospheres. Our discussion in seminar will be based on assignment 6 [pdf].

Here are three readings from Ostlie and Carroll: (1) radiation pressure etc. [pdf], (2) random walk/diffusion [pdf], (3) mass-luminosity relationship [pdf]

Week 5

We'll continue radiation transport this week, finishing up chapter 3, guided by this assignment [pdf].

Week 4

This week we're starting radiation transport (Ch. 3). There is (now) a complete assignment 4 [pdf] for you. Note: clarification/new wording for part of Q1; a second, computational, part to that problem (Q1b); in Q3 I corrected the partition function value for H-; And in Q6 I note a typo in the book. I've also designated questions 4 and 5 as the warmup questions for this week. Plus, I ask you to read section 11 of Ch. 3.

Each student should sign up for one presentation

Week 3

This week it's star formation (Ch. 2). See assignment 3 [pdf].

Each student should sign up for one presentation

Week 2

For our next seminar meeting we'll be finishing up Ch. 1 based on this assignment [pdf].

Look at these stellar spectral sequence resources: RIT notes and the spectral sequences for problems Q7 and Q8.

Week 1

update 1/18: Read this very short bit about human color vision [pdf] – sec. 7.6 from Color and Light in Nature. Note especially the color response of your cones and how much it looks like the filter transmission curves in Fig. 1.3 of LeBlanc.

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 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: April 29, 2017