department of astronomy - courses  
home dept of astronomy mcdonald observatory research hobby-eberly telescope directory university of texas  
home
department of astronomy
mcdonald observatory
research
hobby-eberly telescope
directory
university of texas
 
 
Department of Astronomy

Courses

Faculty Office Hours

Faculty

Weekly Seminars

Colloquia

Péridier Library

Public Outreach

Graduate Program

Prospective Graduate Student Information

Current Graduate Students

Graduate Awards

Undergraduate Program

Degree & Course Information

Awards, Scholarships & Financial Aid

Research & Career Opportunities

College of Natural Sciences

Registrar

University Course Schedule
Astronomy 381 - Spring 2005
ASTROPHYSICAL GAS DYNAMICS II
TTh 12:30 - 2:00 · RLM 15.216B · Unique No. 46840


Professor

Paul Shapiro

Office: RLM 16.204
Hours: TBD
Phone: (512) 471-9422
shapiro@astro.as.
utexas.edu



trifid nebula


While Part I (AST 382C) of this two part course will be helpful, students can take Part II without having had Part I.

This course will survey a wide range of basic gas dynamics in an astrophysical context. The conservation equations of hydrodynamics and magnetohydrodynamics will be derived and studied as in any basic physics course in fluid mechanics. Hydrostatics, magneto-statics, virial equilibrium, polytropes, sound and MHD waves, shocks, flux-freezing, kinetic theory, viscosity, and thermal conduction will be included. Following this, the application to astronomical flows will focus on the equations of compressible flow at high Reynolds number. We will discuss steady flows (e.g. stellar winds, accretion, de Laval nozzles as twin-exhaust radio jets, thermal evaporation of interstellar clouds, steady-state radiative shocks), self-similar but non-steady flows (e.g. Sedov blast waves for supernova remnants, cosmological blast waves in an expanding universe, thermal conduction fronts, interstellar-wind-driven bubbles), and non-steady, non-self-similar flows (e.g. ionization fronts and H II regions, cosmological pancakes, the heating and ionization of a cosmological expanding intergalactic medium). We will discuss instabilities such as the Rayleigh-Taylor, Kelvin-Helmholtz, Jeans, and thermal instabilities, and the gravitational growth of cosmological density fluctuations, using linear perturbation analysis. Additional topics include hydromagnetic dynamos and the generation of cosmical magnetic fields, turbulence, relativistic hydrodynamics, and an introduction to numerical hydrodynamics.

Prerequisites
Suitable for all beginning and advanced graduate students in astronomy and physics. Otherwise consent of instructor is required.

Requirements
Homework Problem sets and one end- of-semester student lecture. A Complete and self-contained set of classnotes will be handed out in place of a textbook. No exams.

Homework
(1) 
Lecture note hand-outs will be required reading.
(2) 
Regular homework problem sets will be assigned roughly once per week, due in class one week later (unless otherwise indicated).
(3) 
A student lecture on a topic to be chosen in consultation with and approved by the professor will be scheduled for the final weeks of class, and accompanying lecture notes on this topic will be handed in at this time.

Grading
The course grade will be based on the homework problem set grades, the student lecture, and the accompanying lecture notes.

 





22 December 2004
Astronomy Program · The University of Texas at Austin · Austin, Texas 78712
prospective student inquiries: studentinfo@astro.as.utexas.edu
site comments: www@www.as.utexas.edu