EXAM 1 will cover up to HW3.  It will cover material in the notes


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+ Chapter 01a Introduction
- absorption lines in spectra
- optical depth, absorption coefficients, ionization breaks
- equivalent widths, curve of growth
- photospeheric layers of line formation
- anatomy of a stellar spectrum

I suggest knowing: 
[ ] the important quantities, Temp, Abundances, Gravity, Microturbulence
[ ] the relationship between the flux decrement and optical depth.  
[ ] the definitions of optical depth and column density [formulae]
[ ] the difference between the mass absorption coefficient and the opacity
[ ] how to draw the curve of growth for different b parameters
[ ] the Balmer jump (its an Ionization Edge, not line blanketing!)

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+ Chapter 01b HR Diagram, Classification
- the HR diagram, luminosity, temperature, radius
- morgan-keenan spectral classification
- luminosity class
- surface gravity on HR diagram

I suggest knowing:
[ ] relationship between L,R,T
[ ] definition of g=GM/R^2
[ ] spectral types, luminosity classes
[ ] qualitative behavior of line widths with log(g) [Pressure broadening]
[ ] range of masses of main sequence stars vs spectral type

I wouldn't sweat:
- additional prefixes for various stars, etc.
- extension to MK classification
- detailed description of Principle Spectral Classes (Table 1-2)

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+ Chapter 01c Photometric Systems
- filter systems, apparent magnitudes
- AB, vega systems
- johnson UVB, SDSS, stromgren
- color indices

I suggest knowing:
[ ] basic filter systems
[ ] definition of apparent magnitude
[ ] definition of Vega system, AB system magnitudes
[ ] the B-V color index, what it measures
[ ] what the c_1 index measures

I wouldn't study:
- being able to draw/sketch/define various filters shapes and centers
- being able to write down the definition of AB magnitudes
- indices from verious systems not mentioned above

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+ Chapter 02 Atomic Transitions
- hydrogenic: bohr, schrodinger
- damping constants, oscillator strengths, selection rules
- fine structure spltting, radiative correction shifts
- multi-electronic atoms, spectroscopic notation
- isoelectronic sequences, periodic table
- grotrian diagrams

I suggest knowing:
[ ] basic structure of Bohr atom, excitation energy, ionization energy
[ ] basic structure of Schrodinger atom, (n,l,m)
[ ] what causes fine structure splittings/shift
[ ] basic structure of Dirac atom, (n,l,j,s)
[ ] the Lamb shift transition, concept of vacuum polarization corrections
[ ] spectroscopic notation for multi-electronic atoms, understand Fig 5.8
[ ] definitions of L, S, J
[ ] selection rules for Dirac atom, for multi-electronic atom
[ ] the oscillator strength, what it is
[ ] the damping constant, how to calculate from Einstein As

I wouldn't study:
- mathematical definitions of energy, excitation, ionization energies
- the details or particulars of quantum mechanics of atoms
- details of energy shifts, splittings in Dirac model (but know structure!)
- if you will need Figure 5.8, I will provide!
- If you need periodic table, I will provide!

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+ Chapter 03a Gas Physics I
- thermal equilibrium, LTE
- particle velocity distributions, the Maxwellian
- radiation in equlibrium: the Planck function
- kinetic energy, particle pressure, partial pressures
- number densities, mass densities, mass fractions
- abundances, solar abundances, mass fractions
- mean molecular weights in partially ionized gas

I suggest knowing:
[ ] what is LTE? what are conditions for LTE?
[ ] able to draw relative f(v) curves for various partcles (mass), and T
[ ] know the mean kinetic energy per particle
[ ] expressions for pressure in terms of number densities, mass densities
[ ] expression for radiation pressure (a/3)T^4
[ ] particle conservation summation laws
[ ] definitions/relationships between mass fractions and abundance fractions
[ ] charge conservation, the equation to determine n_e
[ ] general definitions of mean molecular weights

I wouldn't study:
- knowing formulae of Maxwell velocity distribution function
- knowing the formula for the Planck function
- deriving the various mean molecular weights
- deriving the Saha equation


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+ Chapter 03b Gas Physics II
- bound-bound, bound-free, free-free, scattering absorption/emission
- collisional excitation balance: Boltzmann equation, partition functions
- collisional ionization balance: Saha equation, ionization potentials
- ionization fractions, recursive application of Saha
- combining Boltzmann and Saha: balmer hydrogen densities
- non-equlibrium "temperatures", non-LTE, departure coefficients

I suggest knowing:
[ ] be able to describe bound-bound, bound-free, and free-free physics
[ ] the Boltzmann Equation, definition of partiction function
[ ] the Saha Equation (not all constants, the form and dependencies)
[ ] how to compute ionization fractions
[ ] how to combine Boltzmann and Saha to get number densities of excited atoms
[ ] the behavior of a gas/ions/P_e with increasing T, such as P3 of HW3

I wouldn't study:
- non-equilbibrium gas physics, departure coefficients
- distinctions between T_R, T_e, T_ex, and T_k
- time scales for thermalization of electrons