PROBLEM SET 5

Astronomy 208

Distributed: 11/26/96

Part I Due: 12/5/96

Part II Due: 12/10/96

This problem set relates to two recent guest lectures on star formation.

Part I: Charles Gammie has provided a set of questions which entail using numerical simulation codes for problems related to star formation. Both an html version of the problem and scanned hardcopy are available on-line. The notes from Charles Gammie's 11/19/96 lecture are also on-line.

Part II: Joan Najita discussed magnetocentrifugal wind models, as applied to forming stars on 11/26/96. The "Bondi Problem" which forms the second part of this problem set is available scanned here. Its origin (and a good reference for this and almost any other problem in theoretical astrophysics!) is Shu, F. 1991, The Physics of Astrophysics, Volumes I & II, (Mill Valley, CA: University Science Books). The Bondi Problem can be found in "Problem Set 2" of Volume II. This book is in the personal library of many CfA scientists... please ask one if the Library's copy is unavailable.

Charles Gammie's notes on compiling the codes for Part I:

What they need to do is type ``make oned'' to make the
hydro code.  Then type ``oned'' to run it.  All the input
parameters for oned are read in from a file called oned.in.
To figure out what these parameters are, and what they do,
oned needs to look at the source code, and init.[f,c,f90] in
particular.

They'll also need to type ``make tube'' to make the program
that provides the solution to the shock tube problem.  
The header in the file tube.c contains instructions on how
to run this program.