Welcome to the website for Physics 224. Here you can find links to the syllabus, assignments, lecture notes, and other useful material.

• Syllabus - updated 1/10/20
• Link for paper discussion sign up
• Rubric for Grading Paper Presentations
• Homework 1 - due Jan 24
• Paper Discussion #1 Summary - Jan 24
• Homework 2 - due Feb 7
• Halpha image of the Orion Nebula from MUSE - pixels are 0.2" in size.
• A representative spectrum of the Orion Nebula from MUSE. Units are wavelength in Angstroms (column 1) and relative flux (column 2).
• ds9 - a tool for manipulating fits imates.
• python fits tutorial - if you prefer python
• Paper Discussion #2 Summary - Jan 31
• Paper Discussion #3 Summary - Feb 7
• Paper Discussion #4 Summary - Feb 14
• Homework 3 - due Feb 28
• Paper Discussion #5 Summary - Feb 21
• Paper Discussion #6 Summary - Feb 27
• Paper Discussion #7 Summary - rescheduled for Mar 9

• The proposal is due Monday March 9 by 5pm PST. Please turn it in as a pdf by email to me.
• The hard cut off on homework is Friday March 13 at 5pm.
• Our Physics 224 Time Allocation Committee meeting will be held Friday March 13 in class.

• 1/24 - Redfield & Linsky 2008 - led by Zackary Rehfuss
• 1/24 - Zachary et al. 2018 - led by Christian Aganze
• 1/31 - Stromgren 1939 - led by Sanchit Sabhlok
• 1/31 - Werk et al. 2014 - led by Ryan Rickards Vaught
• 2/7 - Mathis, Rumpl & Nordsieck 1977 - led by Roman Gerasimov
• 2/7 - Sellgren et al. 1984 - led by Darius Choksy
• 2/14 - Field, Goldsmith & Habing 1969 - led by Cameron Trapp
• 2/14 - Tielens & Hollenbach 1985 - led by James Wiley
• 2/21 - Larson 1981 - led by Eltha Yu-Hsuan Teng
• 2/21 - Goodman, Pineda & Schnee 2009 - led by Joe Seibert
• 2/28 - McKee & Ostriker 1977 - led by Jake Spisak
• 2/28 - Walch et al. 2015 - led by William Hicks
• 3/6 - Haffner et al. 2009 - led by Daniel Gonzales

• Observational Proposals
• Hubble Cycle 28 Call for Proposals - includes theory/archive
• ALMA Cycle 7 Call for Proposals
- Cycle 8 call will be released soon too.
• Supercomputing Proposals
• XSEDE Research Allocations

• Lecture 1 Slides - Overview of class and ISM historical perspective
• Lecture 2 - Collisional processes (on board, no slides)
• Lecture 3 - More collisions, detailed balance, two-level atom (on board, no slides)
• Lecture 4 Slides - Energy levels, transitions, quantum mechanics review
• Lecture 5 Slides - Energy levels, intro to radiative transfer
• Lecture 6 Slides - Radiative Transfer, Proposals and Scientific Presentations
• Lecture 7 Slides - HI Radiative Transfer, Absorption Lines
• Lecture 8 Slides - Ionization and Recombination
• Lecture 9 Slides - HII regions, collisional excitation and nebular diagnostics
• Lecture 10 Slides - Nebular Diagnostics, HII region heating and cooling
• Lecture 11 Slides - Dust extinction, optical properties
• Lecture 12 Slides - Dust thermal balance and emission
• Lecture 13 Slides - Photoelectric effect, dust composition and ISM phases
• Lecture 14 Slides - Phases of neutral gas
• Lecture 15 Slides - Formation of molecular hydrogen, ISM chemistry
• Lecture 16 Slides - Tracing molecular gas, Molecular Clouds
• Lecture 17 Slides - Magnetic fields, observations of molecular gas
• Lecture 18 Slides - More observations of molecular gas, star formation, feedback
• Lecture 19 Slides - Supernova Remanants, cosmic rays, diffuse ionized gas
• Lecture 20 Slides - Global ISM models, ISM in other galaxies

• Curve of Growth Widget from Yuan-Sen Ting. Very useful for understanding how the Voigt line profile leads to the "curve of growth" for absorption lines.
• Notes on Star Formation - online textbook by M. Krumholz