ASTR 242: Week-by-week Log


1. Stars: Basic Properties

Topics:    Measuring the AU (slides) — Stellar Parallax (slides) — Stellar Distance Scale (slides)Luminosity & FluxBroadband FluxesApparent Magnitudes — Absolute Magnitudes — Black-Body RadiationB.-B. Rad. ContinuedStars: Colors & Temperatures — Stellar Masses — Stellar Radii.

Assignment:    Problem Set #1: Due 23 January 2014.

2. Stars: Spectra

Topics:    Bohr Model of AtomHydrogen "Lines"Atomic ProcessesLine FormationAdditional FactorsExcitation & Ionization: H linesOther Lines: CaII — Spectral Classification (slides)Luminosity Classification (slides) — Doppler Shift (slides).

Assignment:    Problem Set #2: Due 30 January 2014.

3. Interstellar Medium

Topics:    ISM OverviewNon-LTECNM & WNM: 2-Phase Model — Galactic Recycling (slides)DustRadiative TransferInterstellar ExtinctionNeutral HydrogenMapping the Neutral ISM — Molecular Lines (slides) — Multi-Wavelength ISM (slides).

Assignment:    Problem Set #3: Due 6 February 2014.

Links:    The hydrogen 21-cm line — reprint of Ewen & Purcell's paper announcing the detection of the neutral hydrogen line.

4. Structure of the Milky Way

Topics:    Structure of the Milky Way (slides)Star Clusters (slides) — Cluster Color-Magnitude Diagrams (slides)Stellar PopulationsComponents — Color-Color Diagrams (slides)CoordinatesLocal Standard of RestDifferential RotationRotation CurveDark Matter — The Galactic Center (slides).

Assignment:    Problem Set #4: Due 13 February 2014.

5. External Galaxies

Topics:    External GalaxiesGalaxy Morphology (slides)LuminositiesColors3-D ModelsKinematicsRelaxation TimescaleCollisionless Dyanmics — Spiral Structure (slides) — Distances (slides).

6. Review #1

Handout:    Review Questions #1: 13 February 2014.

7. Galaxy Evolution

Topics:    Galaxy EvolutionPhotometric EvolutionSingle-Burst Model (slides) — Photometric Evolution (slides) — Interacting Galaxies (slides) — Active Galaxies (slides).

Assignment:    Review Questions not used on exam: Due 6 March 2014.

8. Mapping the Universe

Topics:    Mapping the UniverseDistance ReviewHubble LawExpansion of the Universe — Large-Scale Structure (slides) — Local Cosmography (slides)Groups & ClustersCluster Masses (slides)Intra-Cluster GasHydrostatic EquilibriumGravitational LensingStrong Lensing.

Assignment:    Problem Set #5: Due 13 March 2014.

9. Cosmological Models

Topics:    Cosmological ModelsGeometryMetricsSpace-Time MetricsAngular Size & Apparent BrightnessRedshift 1Redshift 2Newtonian CosmologyFriedmann EquationRelativistic Friedmann Equation.

Assignment:    Problem Set #6: Due 20 March 2014.

10. The Big Bang

Topics:    The Big BangCritical DensityΛ—Dominated UniverseEvidence of Accelerating Expansion (slides) — Cosmic Microwave Background (slides) — Consensus ModelBBN: Neutron AbundanceBBN: ResultsInflation (slides).

11. Review #2

Handout:    Review Questions #2: 20 March 2014 — Review Questions #3: 27 March 2014.

12. Stellar Evolution

Topics:    Review of SunPhysical ProcessesEquations of Stellar StructureScaling with MassStructure Along Main SequencePost-Main Sequence — Main Seq. to Pl. Neb. (slides) — High-Mass Stars (sldes)Outcomes by Initial Mass — Evolutionary Tracks (slides).

Assignment:    Problem Set #7: Due 17 March 2014.

13. Stellar Remnants

Topics:    Phase DiagramParticles in 1-D BoxElectrons in 3-D boxRelatavistic EffectsWhite DwarfsChandrasekhar Limit — White Dwarf Stars (slides) — Accreting White Dwarfs (slides)Neutrino EmissionCore Collapse (slides) — Supernovae Compared (slides) — Supernovae Remnants (slides) — Neutron Stars (slides) — Black Holes (slides).

Assignment:    Problem Set #8: Due 24 April 2014.

14. Origin of the Elements

Topics:    Abundances in Solar System (slides) — Abundances in Other StarsNuclear Landscape (slides) — ReactionsNeutron Capture: s-processNeutron Capture: r-processPrimary vs SecondaryChemical EvolutionEvolution EquationsEvolution Results (slides) — Iron-Group Elements — Terrestrial Abundances (slides).

Assignment:    Problem Set #9: Due 29 April 2014.

15. Review #3

Handout:    Review Questions #4: 29 April 2014 — Review Questions #5: 1 May 2014.

Discussion:    Key QuestionsBlack Holes56Ni Decay (#1)S Process (#3c)Evolutionary Flux (#4b)Gravitational Machines (#6ab)Gravitational Machines (#6c)Gravitational Machines (#6d)Solar Neutrinos (#7a)Neutrino Detection (#7cd)Fingers of God (#8a)Turn Around (#8d)Interstellar Gas (#12c).

Links:    Gravitational Machines — Freeman J. Dyson's paper, from Interstellar Communication, edited by A.G.W. Cameron.


Joshua E. Barnes      (barnes at ifa.hawaii.edu)
Updated: 6 May 2014
http://www.ifa.hawaii.edu/~barnes/ast242_s14/weeklog.html
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