ASTR 242: Class Log


1. Stellar Parameters

Handouts: Syllabus.

Board: Stellar Parameters, Measuring the AU, Stellar Parallax [11 Jan] Luminosity & Flux, Broadband Fluxes, Magnitude (Apparent), Absolute Magnitude [13 Jan], Black-Body Radiation, Energy Levels & Transitions, Stellar Atmospheres, Starlight [15 Jan].

Slides: Stellar Spectra [15 Jan].

2. Stellar Parameters

Board: Photospheric Temperature, Effective Temperature of Sun, Temperature vs. Color, Stellar Masses, Stellar Radii, HR Diagrams [20 Jan], HR Diagrams, Problem 1.1, Problem 1.2 [22 Jan].

Slides: Binary Stars [20 Jan].

Handouts: Hertzsprung-Russel Diagram [src].

Assignment: Problem Set #1: Due 25 January 2016.

3. The Interstellar Medium

Board: Interstellar Medium, Dust Scattering: Cross–Section, Radiative Transfer, Interstellar Extinction [25 Jan], ISM: Non-LTE, Neutral Hydrogen: 21–cm radiation, CNM & WNM: 2–phase model [27 Jan], Problem 2.1, Problem 2.2, Problem 2.3 [29 Jan].

Slides: Interstellar Medium [25 Jan], Multi-Wavelength Images [27 Jan].

Assignment: Problem Set #2: Due 1 February 2016.

4. The Milky Way

Board: The Milky Way, Distances in MW, Stellar Populations [1 Feb], Galactic Coordinates, Stellar Motion & Local Standard of Rest, Differential Rotation, Source for Fig. 19.16, Rotation Curve [3 Feb], Problem 3.1, Problem 3.2, Problem 3.3 [5 Feb].

Slides: Star Clusters [1 Feb].

Assignment: Problem Set #3: Due 8 February 2016.

5. External Galaxies

Board: Distances: Cepheid Variable Stars (period-luminosity relation), Morphology: The Hubble Sequence [8 Feb], Galaxy Spectra (stellar spectra, galaxy spectra), Galaxy Kinematics, Galaxy Dynamics [10 Feb].

Slides: External Galaxies [8 Feb].

6. Review #1

Handouts: Review Questions #1.

7. Mapping the Universe

Board: Exam Q. 2, Exam Q. 4, Distance Scales (TF relationship [src]), Hubble's Law (H0 values [src]), Expansion of the Universe, [22 Feb], Mapping the Universe, Cluster Masses: Virial Theorem, Cluster Masses: Hydrostatic Equilibrium, Cluster Masses: Gravitational Lensing [24 Feb], Small-angle Deflection, Mass Estimates for Clusters (revised numbers), Problem 4.1, 4.2 [26 Feb].

Slides: Mapping the Universe [24 Feb].

Assignment: Problem Set #4: Due 29 February 2016.

8. Galactic Evolution

Board: Galactic Evolution, Passive Evolution, (E Galaxy Spectra & Models [src]), Star Formation Rates, (S Galaxy Spectra & Models [src]) [29 Feb], Evolution: Review, Active Galaxies, Super-Massive Black Holes [2 Mar], Problem 5.1, Problem 5.2 [4 Mar].

Slides: Galaxy Evolution: Mergers [29 Feb], Galaxy Evolution: Active Galaxies [2 Mar].

Assignment: Problem Set #5: Due 7 March 2016.

9. Cosmological Models

Board: Cosmological Models, Geometry of Universe, Space-Time Metrics, Redshift (incomplete) [7 Mar], Redshift, Newtonian Cosmology, Relatavistic Friedmann Equation [9 Mar], Problem 6.1, Problem 6.2 [11 Mar].

Assignment: Problem Set #6: Due 14 March 2016.

10. The Big Bang

Board: Cosmic Microwave Background [14 Mar], Best-Bet Model (Fig. 24.2, Fig. 24.3), Λ—Dominated Universe [16 Mar], Λ—Dominated Universe (Distance vs. Redshift for Type Ia Supernovae [src]), Big Bang Nucleosynthesis: Neutrons, Big Bang Nucleosynthesis: Reactions, (BBN yields vs. Baryon Fraction [src]) [18 Mar].

Slides: The Big Bang: CMB [14 Mar].

Handouts: Particles & Reactions.

11. Review #2

Board: Question 3, Question 9, Question 11, Question 7 [28 Mar], Questions 1 & 2, Question 10, Question 5 [30 Mar], Answer 2, Answer 4 [4 Apr].

Handouts: Review Questions #2.

12. Stellar Structure

Board: Review: the Sun, Physical Processes in Stars (CNO Cycle, fig. 15.6, corrected), Equations of Stellar Structure [6 Apr], Equations of Stellar Structure, Problem 7.1 (Theoretical HR diagram with Main Sequence [Carroll & Ostile, fig 10.13]), Problem 7.2 [8 Apr].

Assignment: Problem Set #7: Due 11 April 2016.

13. Stellar Evolution

Board: Estimating L, Scaling Relationships on Main Sequence, Main Sequence Stars [11 Apr], Stability of Stars, Stellar Feedback Loop, Advanced "Burning" (Nuclear Binding Energy) [13 Apr], Problem 8.1, Problem 8.2 [15 Apr].

Slides: Stellar Evolution [13 Apr].

Assignment: Problem Set #8: Due 18 April 2016.

14. Stellar Remnants

Board: States of Matter, Particles in 1-D Box, Electrons in 3-D Box [18 Apr], White Dwarf Stars, Relatavistic Effects, Chandrasekhar Limit (Mass-Radius Relationship for WD Stars [src]) [20 Apr] Problem 9.1, Problem 9.2 [22 Apr].

Slides: Stellar Remnants [20 Apr].

Assignment: Problem Set #9: Due 25 April 2016.

15. Origin of the Elements

Board: Big Ideas of Stellar Evolution, Evolution of High-Mass Star (Stages of Nuclear Burning), Core Collapse [25 Apr], Supernovae Compared (Light Curves), Solar System Abundances (Abundances vs. Z and A [src], Abundances of Isotopes [Arnett (1996), Figs. 2.2—2.5]), The Nuclear Landscape (Decay Modes [src], Decay Rates [src]) [27 Apr], Light Elements, Heavy Elements, Chemical Evolution [29 Apr].

16. Review #3

Board: Question 6, Question 18(b) [2 May], Questions 11 & 14, Question 15, Question 21 [4 May].

Handouts: Review Questions #3.


Joshua E. Barnes      (barnes at ifa.hawaii.edu)
Updated: 11 May 2016
http://www.ifa.hawaii.edu/~barnes/ast242_s16/classlog.html
Valid HTML 4.01!