## Welcome to Astro 405/505 for Fall 2002!

Instructors: Prof. Steven Kawaler and Prof. David Carter-Lewis

### UNDER CONSTRUCTION

From the course catalog:

Astro 405. Astrophysics (Dual-listed with 505.)
(3-0) Cr. 3. F. Prereq: 342 or 346; Math 266.
Survey of astrophysics at an advanced level. Physics of stars, galaxies, and the universe. Stellar spectra, structure and evolution. Origin of the elements. Black holes, neutron stars and white dwarfs. Large scale structure of the universe, dark matter, Big Bang Cosmology.

We meet at 3:10-4:00 on Monday, Wednesday, and Friday in Room 43 Physics.

### Recent Stuff

• Iben's Review of Stellar Evolution
• Homework 4: Due Friday, October 18, 2002
• C&O Problem 13.11
• C&O Problem 13.13
• C&O Problem 14.13 - a computer problem
• The pulsating subdwarf B star PG1336 (remember that one from earlier in the course?) can also be modeled using the same code you wrote for problem 14.13. So, use that code to calculate the pulsations of a star with
• M=0.5 Mo
• R=0.06Ro.
You will have to adjust the mass of the shell (m) and the initial pressure Pi to result in a periodic behavior of v, r, and P (use the same initial velocity as in 14.13). You will also need to adjust the time step that you use so that the 150 steps show about 4 full cycles. Think about how to do this rather than just trying to blindly guess numbers.
• Homeworke 3: Due 27 September

• Homework #2: was due Friday, September 13, 2002.
Problems are from Carroll & Ostlie:
• Problem 8-12
• Problem 8-14
• Problem 8-16
• Problem 9-7
• Problem 9-11
• Rogers and Iglesias review paper on astrophysical opacities

• Homework 1: Due 4 September

• Images and sources from week 1

### Resources: Textbook

available at the University Bookstore for about \$130 (new), or about \$90 (used). You can also probably find it for less (and maybe significantly less) at used book sites such as AddAll.

Be sure to get the thick one (orange cover, over 1400 pages) and NOT the '... Stellar Astrophysics' version. Good luck!

### Resources: Journals

As seniors and graduate students, you should be able to read the 'technical' literature of any physical science and at least glean some things of interest (assuming you can get through the jargon of the field). To that end, we include links to the main journals of astronomy - have a glance occasionally at the current online journals to see how the field is doing! All are available from ISU-based computers via the WWW.

• The Astrophysical Journal - the premier journal of astrophysics. Papers in the "ApJ" can be purely theoretical, or purely observational, but most lie somewhere in between. The "ApJ" consists of three separate publications: the main Journal, the ApJ Letters which are short papers of high interest that get published rapidly, and the ApJ Supplement which contains longer papers (frequently catalogs and other reference papers). In addtion, the ApJ publishes occasional CD-ROMs as part of the Supplement.

• The Astronomical Journal - the premier journal of observational astronomy. "AJ" papers concentrate on observations, with limited interpretation, but there is no hard and fast rule.

• Astronomy and Astrophysics - another top journal, concentrating on European research (though I publish there because there are no page charges!). The Europeans have it right - no distinction between astronomy and astrophysics - it is all there. Includes a 'Letters' section that contains short papers with rapid turnaround within the same covers. Much more material on stellar astrophysics than the ApJ.

• Monthly Notices of the Royal Astronomical Society - the main journal for British astronomy, it also publishes papers from astronomers around the world. A top journal.

• Annual Reviews of Astronomy and Astrophysics - authoritative reviews from experts in a wide variety of subjects - uniformly excellent papers, and a good "first place to go" when exploring a new field within astronomy.

• Other Journals - other smaller journals are more specialized in topic or approach. For example, Publications of the Astronomical Society of the Pacific (or PASP) has frequent papers on astronmical instrumentation, and dissertation abstracts. Icarus is the premier journal for solar system/planetary astronomy. Nature, Science, and Scientific American frequently have important astrophysics papers of broad intrest. Etc., etc.

• Online access to the literature- In addition to the above journal links, most of the literature is available for indexed searches by author, keyword, and object via the NASA Astrophysics Data Service - an incredibly useful resource that I use at least 5 times a day. Also, there is a heavily used Preprint Server through arXiv.org - nearly all astronomy preprints are posted there before publication. Also well indexed.

Web materials

Consider a spherical cow...

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