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LECTURE 20, NOVEMBER 9, 2010

LECTURE 20, NOVEMBER 9, 2010. ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu. Question 6. a) a beam of light. b) a massive object. c) neutrinos. d) antimatter. e) All of the above are correct. The force of gravity can pull on. Question 6. a) a beam of light.

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LECTURE 20, NOVEMBER 9, 2010

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  1. LECTURE 20, NOVEMBER 9, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu ASTR 101-3, FALL 2010

  2. ASTR 101-3, FALL 2010

  3. ASTR 101-3, FALL 2010

  4. ASTR 101-3, FALL 2010

  5. ASTR 101-3, FALL 2010

  6. Question 6 a) a beam of light. b) a massive object. c) neutrinos. d) antimatter. e) All of the above are correct. The force of gravity can pull on

  7. Question 6 a) a beam of light. b) a massive object. c) neutrinos. d) antimatter. e) All of the above are correct. The force of gravity can pull on Gravity is described by general relativity as a bending of space, and all particles, including photons, move through warped space along curved paths.

  8. ASTR 101-3, FALL 2010

  9. Question 8 a) is the point where X rays emerge. b) is the physical surface of the hole. c) defines the outer edge of an accretion disk. d) is measured by the Schwarzschild radius. e) extends for millions of miles into space. The event horizon of a black hole

  10. Question 8 a) is the point where X rays emerge. b) is the physical surface of the hole. c) defines the outer edge of an accretion disk. d) is measured by the Schwarzschild radius. e) extends for millions of miles into space. The event horizon of a black hole The event horizon is the surface of an imaginary sphere around a collapsed object inside of which nothing, including light, can escape.

  11. ASTR 101-3, FALL 2010

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  16. Question 5 a) NASA’s latest X-ray orbiting telescope. b) a millisecond pulsar with three planets. c) the strongest X-ray eclipsing binary system. d) a likely black hole binary star system. e) the first gamma-ray burster spotted in X rays. Cygnus X-1 is

  17. Question 5 a) NASA’s latest X-ray orbiting telescope. b) a millisecond pulsar with three planets. c) the strongest X-ray eclipsing binary system. d) a likely black hole binary star system. e) the first gamma-ray burster spotted in X rays. Cygnus X-1 is Cygnus X-1 is an X-ray source with one visible star orbited by an unseen companion of at least 10 solar masses, and very rapid changes in the signal indicating a small source.

  18. ASTR 101-3, FALL 2010

  19. TEST REVIEW-SOURCE OF QUESTIONS • From Mastering Astronomy Homework: 11 • From Publisher, Difficulty Level 1(Easiest): 15 • From Publisher, Difficulty Level 2: 14 • From Publisher, Difficulty Level 3: None • Of the 40 Questions, 26 or 65% are at the Easiest Level ASTR 101-3, FALL 2010

  20. REVIEW, CHAPTER 9THE SUN • Basics: Interior, Convection Zone, Photosphere, Corona • Solar Constant, Solar Rotation, Sunspot Cycle • Origin of Solar Wind • Sun’s Energy Source ASTR 101-3, FALL 2010

  21. REVIEW, CHAPTER 10THE STARS • Parallax, Parsec, Absolute Magnitude • H-R Diagram, Main Sequence, Giants, Supergiants, Planetary Nebulae, White Dwarfs • Binaries and Masses, Sizes of Stars • Main Sequence Lifetimes ASTR 101-3, FALL 2010

  22. REVIEW, CHAPTER 11ISM & STAR FORMATION • ISM Gas Composition, 21-cm Radiation • Dust, Reddening, Dark Areas • Star Formation • Philosophy of Stellar Evolution Studies • Star Clusters and H-R Diagrams ASTR 101-3, FALL 2010

  23. REVIEW, CHAPTER 12STELLAR EVOLUTION (+White Dwarfs) • Evolution of Sun-like Stars, White Dwarfs • Evolution of Massive Stars, Which Elements Can Undergo Fusion • Cluster Ages • Novae • Chandrasekhar Limit, Type I and Type II Supernovae ASTR 101-3, FALL 2010

  24. REVIEW, CHAPTER 13NEUTRON STARS & BLACK HOLES • Evidence for Supernovae, Remnants, Crab Nebula • Formation of the Elements • Neutron Stars, Pulsars • Spacetime and Gravity, Black Holes, Event Horizon, Cygnus X-1 ASTR 101-3, FALL 2010

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