Midterm Review  C162 Planetary Astrophysics
 Midterm 1 is inclass Thurs Sept 21
 Each midterm is worth 12.5% of the final grade
 Each midterm will have multiple problems similar to the questions of the day
 Each midterm will start promptly at the beginning of class and last 80 minutes  BE ON TIME!!!
 No calculators allowed
 A singlesided cheat sheet on a normal 8.5
×
11” sheet of paper is allowed for midterm 1; the back
side may be filled out for midterm 2.
Formulas and Concepts I should understand before Midterm 1
Formulas and Concepts
Magnetospheres  Concepts
Magnetopause standoff distance (Formula)
Aurora creation
Motion of charged particles
Sources and sinks of charged particles
Solar Cycle, periodicity and observable features
Ohmic decay of a magnet (Formula)
Planetary magnetic field types
Interaction of bodies with the solar wind
Magnetic field as a function of planetary radius (Formula)
Dynamics  Formulas
Equations/geometry of an elliptical orbit; location of periapse and apoapse
Gravitational acceleration, force, and potential
Kepler’s Laws
Angular momentum (and conservation of)
VisViva equation
Escape velocity
Jacobi constant
Tidal forces; Roche limit
1
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Atmospheres
Ideal gas law
Hydrostatic Equilibrium
Scale Height
Gravitational acceleration, force, and potential
Dry and wet adiabatic lapse rate
Blackbody radiation and Planck’s function  Wein’s and RayleighJean’s Law
StefanBoltzmann Law
Equilibrium Temperature
Brightness on a uniform sphere
Equation of radiative transfer for constant source functinon
Doppler shift and broadening
ClausiusClapeyron equation
Coriolis force
Production rates in equilibrium (in the context of photochemistry)
Limiting flux
Jean’s escape
Questions
Magnetospheres
1. What causes Auroras?
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 Fall '17
 Imke de Pater

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