ASTR
341: 
Stars and
Radiation
Course
Timetable: Fall 2016
1 
Aug. 30 
Course overview and logistics. 
2 
Sep. 1 
Units in Astrophysics: distance, frequency, wavelength, energy. Definition of flux and specific intensity. Relation between flux and specific intensity. Magnitudes and colors. 

Sep. 6 
Labor Day Holiday 
3 
Sep. 8 
Radiation processes: power loss from an accelerated charge  Cyclotron radiation  Synchrotron radiation 
4 
Sep. 13 
Radiation processes: Bremsstrahlung radiation  Blackbody radiation: general  Planck spectrum  Wien displacement law  RayleighJeans law 
5 
Sep. 15 
Blackbody Radiation (cont.): Effective temperature – Brightness temperature  Problem on blackbody radiation and exoplanets  Introduction to Radiative Transfer. 
6 
Sep. 20 
Emission and Absorption coefficients  Optical Depth  The Radiative Transfer Equation  Optical depth effects on blackbody emission  Boundbound and boundfree transitions. 
7 
Sep. 22 
Boltzmann equation  Saha Equation – Absorption and Emission spectra. 
8 
Sep. 27 
Broadening of spectral lines: Doppler, Natural and Collisional broadening – Electronphoton scattering: Thomson scattering, Compton scattering, Inverse Compton. 
9 
Sep. 29 
Stars: introduction  Population I, II and III stars  Basic assumptions of stellar theory  Observational properties of stars. 
10 
Oct. 4 
Observational properties of stars (cont.)  Review and problem solving. 
11 
Oct. 6 
Test I 
12 
Oct. 11 
HR diagram  spectral classification  mass measurements 
massluminosity relation. 
13 
Oct. 13 
Equations of stellar structure: mass conservation, energy conservation, hydrostatic equilibrium 
14 
Oct. 18 
Virial Theorem  Equation of energy transport  Equation of state 
15 
Oct. 20 
Opacity  Energy generation in Stars: Fusion 
16 
Oct. 25 
Hydrogen burning: PP cycle and CNO cycle  Helium burning: triplealpha reaction  Silicon burning and nuclear statistical equilibrium  neutron capture and the production of elements heavier than Iron 
17 
Oct. 27 
Stability of stars on the main sequence  Convection  Post main sequence phase – Red giants – Post red giant evolution. 
18 
Nov. 1 
Degeneracy Pressure: general properties and FermiDirac distribution  Problem Solving 
19 
Nov. 3 
Test II 
20 
Nov. 8 
Computation of the degeneracy pressure in the nonrelativistic and relativistic limit – Late states of evolution of low mass stars – Planetary nebulae 
21 
Nov. 10 
White Dwarfs: structure and derivation of the massradius relation 
22 
Nov. 15 
Type II Supernovae  Supernova remnants 
23 
Nov. 17 
Neutron Stars  Introduction to Pulsars 
24 
Nov. 22 
Pulsars (cont). Origin of the Xray and Radio emission:Thermal and non thermal components. Neutron Stars in Xray binaries. 

Nov. 24 
Thanksgiving Holiday 
25 
Nov. 29 
Basics of the Theory of General Relativity  Black Holes: Schwarzschild's solution – Types of black holes in the Universe. 
26 
Dec. 1 
Black Holes (cont.): Kerr solution – No hair theorem – Hawking radiation. 
27 
Dec. 6 
Test III 
28 
Dec. 8 
Course Review 

Dec. 13 
FINAL EXAM 