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

• Syllabus - updated 5/6
• Link for paper discussion sign up
• Homework 1 - due 4/18
• Rubric for Grading Paper Presentations
• Homework 2 - due 5/3
• 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
• Homework 3 - due 5/23 or whenever

• 3/29/16: Lecture on Friday 4/1 is cancelled - we will add on 25 minutes to the next Monday and Wednesday lectures to make it up.
• 4/12/16: A tiny bit of rescheduling - the class on May 13 is cancelled. Paper presentations that were previously scheduled for 5/6 and 5/13 are each going to be moved forward one week. So papers 3 and 4 will be presented on 4/29 and papers 5 and 6 will be on 5/6.

• Observational Proposals
• Hubble Cycle 24 Call for Proposals - includes theory/archive
• ALMA Cycle 4 Call for Proposals
• Supercomputing Proposals
• XSEDE Research Allocations

• Lecture 1 Slides - Overview of class and ISM historical perspective
• Lecture 2 Slides/Notes - More ISM overview and start of collisional processes
• Lecture 3 Slides - More collisions, some statistical mechanics and quantum (notes coming soon)
• Lecture 4 Slides - Energy levels, Two-Level atom excitation, Line profiles (notes coming soon)
• Lecture 5 Slides - Proposals and Scientific Presentations
• Lecture 6 Slides - Radiative Transfer, HI 21-cm (notes coming soon)
• Lecture 7 Slides - Ionization and Recombination
• Lecture 8 Slides - HII Regions
• Lecture 9 Slides - finishing HII regions, then dust!!!
• Lecture 10 Slides - Dust optical properties, thermal balance
• Lecture 11 Slides - Dust thermal balance, emission, photoelectric effect, dust composition
• Lecture 12 Slides - ISM phases, neutral gas, 2-phase equilibrium
• Lecture 13 Slides - Neutral gas, testing the 2 phase model, HI to H2 transition
• Lecture 14 - notes soon - intro to fluid dynamics
• Lecture 15 - guest lecture by Dr. Alexei Kritsuk on density PDFs then more fluid dynamics
• Lecture 16 - notes soon - fluid applications, Jean's mass
• Lecture 17 Slides - molecular clouds
• Lecture 18 Slides - more molecular clouds and star formation
• Lecture 19 Slides - magnetic fields, star formation, feedback
• Lecture 20 Slides - ethics and research
• Lecture 21 Slides - feedback, cosmic rays, closing the loop
• Lecture 22 Slides - Orion Nebula meta-study results

• 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