Ay126: Interstellar Medium

There is no single book that can cover both pedagogy and at the same time the astrophysics of ISM. Draine (Physics of the Interstellar and Intergalactic Medium) does a very good job on the latter. I will make use of a variety of sources for pedagogy. I would recommend that you buy a copy of Draine's book. Below "Chapter" refers to appropriate chapter in Draine's book.

The URL lists the errata and has problem sets and figures used in the book.


RESERVED BOOKS:
The Physics of Interstellar Dust by Endkri Krugel
Astrophysics of gaseous nebulae and active galactic nuclei by Donald E. Osterbrock, Gary J. Ferland
Atomic energy levels and Grotrian diagrams, vol. 1-4 by Stanley Bashkin and John O. Stoner, Jr
Introduction to atomic spectra by Harvey Elliott White


Interesting sites: J"orn Wilms, Erlangen-Nuremberg. Nice site of notes related to high energy astrophysics and atomic processes. Look under teaching (e.g. Astrophysical Radiation Processes"
Richard Mushotzky's collection, particularly good for X-ray astronomy.
HOMEWORK POLICY: You are free to discuss amongst yourselves. In fact, much of learning is peer-to-peer. Brain storming is good. However, true understanding comes from within and so there is a delicate balance between communal problem solving and deep contemplation. The latter will stand you in good stead. I suggest the following approach: do your best to solve the homework. Sometimes you simply cannot make a headway. Those problems are grist to group discussions. What you submit must your own work (typed, written, programmed, drawn).
GRADING FRAMEWORK: Two third will be determined by homeworks. The remaining one third will be a final exam.
VENUE & TIME: Given COVID-19 all of our classes will be in the Cloud.
Tuesday & Thursday 2:30-3:55p
FINAL EXAM. The master question list for final exam will be posted close to mid-term exam.
  1. Introduction (March 30)
    Pictorial Introduction.
    From early Universe to present universe. Dark Matter Simulation (Steinmetz) . Simulation with gas (Hopkins) Red is million degrees gas, green is 10^4 to 10^5 K gas and magenta is cold gas.
    Recording

  2. Hydrogen Spectrum; ISM Phases (April 1)
    Spectrum of Hydrogen  |  Hydrogen Wave functions (UMich, Chem461) |  Ionization Table & Chart  |  ISM Global n,T  |  Phases & Cosmic Abundance
    Recording I  |  Recording II

  3. Spectra of Alkali Elements (April 6)
    Spin-orbit interaction  |  "spdf" notation  |  Spectra of Alkali Elements
    Homework 1 (due April 16)
    Recording

  4. The spectrum of Helium (April 8)
    Helium atom (SRK)  | 
    Quantum Mechanics of the Helium Atom [UMich, Chem461]  |  Periodic Table [UMich, Chem461]  |  Hylleraas solution
    Recording

  5. Spectroscopic Terms, Hund's Rules, Allowed & Forbidden Lines (April 13)
    Orbitals |  LL & JJ coupling |  Allowed & Forbidden Lines
    Homework 2 (due April 22, 2021)  |  Unix program to determine spectroscopic terms
    Recording

  6. Far Infrared & Submillimeter Astronomy (April 15)
    IR background  |  Talk on FSL by Stancil  |  Collisional Processes (Chapter 2).
    Beginnings of FSL astronomy
    Recording

  7. Collisonal Coefficients, Oscillator Strength, Critical Density (April 20)
    Chapters 2, 6, 17
    Recording

  8. April 22 Recording

  9. WNM & CNM April 26
    Recording

  10. Warm Ionized Medium (April 29)
    Introducing WIM  |  Glassgold Lecture on WIM  |  Plasma Frequency, Dispersion
    Recording
    Extra Reading: Review of WHAM  |  WIM review  |  History of Radio Astronomy

  11. Recombination (May 4)

    Homework 3: Due May 17

  12. HII regions (May 6)
    Recombination-II  |  Stromgren sphere  |  Thermal Balance
    Recording