Lecture15

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Lecture15

  1. 1. What is this? PH1600: Introductory Astronomy Lecture 15: Star Clusters
  2. 2. PH1600: Introductory Astronomy Lecture 15: Star Clusters Next Lecture: Star Death & Black Holes <ul><li>School: Michigan Technological University </li></ul><ul><li>Professor: Robert Nemiroff </li></ul><ul><li>Online Course WebCT pages: </li></ul><ul><li>http://courses.mtu.edu/ </li></ul><ul><li>This class can be taken online ONLY, class attendance is not required! </li></ul>
  3. 3. You are responsible for… <ul><li>Lecture material </li></ul><ul><li>Listed wikipedia entries </li></ul><ul><ul><li>But not higher math </li></ul></ul><ul><li>APODs posted during the semester </li></ul><ul><ul><li>APOD review every week during lecture </li></ul></ul><ul><li>Completing the Quizzes </li></ul><ul><ul><li>Homework quizzes 1 - 7, Midterm already due </li></ul></ul><ul><ul><li>Homework 8 released later (Wednesday) </li></ul></ul><ul><ul><li>See WebCT at http://courses.mtu.edu/ </li></ul></ul>
  4. 4. Wikipedia entries: <ul><li>HR Diagram </li></ul><ul><li>Cepheid variable </li></ul><ul><li>Open cluster </li></ul><ul><li>Globular cluster </li></ul>
  5. 5. Cepheid variable stars <ul><li>Longer periods means greater absolute brightness </li></ul><ul><li>See link: </li></ul><ul><ul><li>http://www.youtube.com/watch?v=NNPAlAZ_iKY </li></ul></ul>
  6. 6. Andromeda Nebula: Var! Credit: Mount Wilson Observatory Historical Archive APOD: 1996 April 6
  7. 7. The Cepheids of M100 Credit: NASA, HST, W. Freedman (CIW), R. Kennicutt (U. Arizona), J. Mould (ANU) APOD: 1996 January 10
  8. 8. Open Clusters <ul><li>Young </li></ul><ul><ul><li>< 1 billion years </li></ul></ul><ul><ul><li>Light dominated by biggest blue stars </li></ul></ul><ul><li>10 – 1,000 stars </li></ul><ul><li>Found in Galactic Plane </li></ul><ul><li>All stars born at the same time </li></ul><ul><ul><li>All stars at the same distance </li></ul></ul>
  9. 9. M45: The Pleiades Star Cluster Credit & Copyright: Robert Gendler APOD: 2006 January 9
  10. 10. Perseid Fireball Over Japan Credit & Copyright: Katsuhiro Mouri & Shuji Kobayashi (Nagoya City Science Museum / Planetarium) APOD: 2004 August 13
  11. 11. Open Cluster NGC 290: A Stellar Jewel Box Credit: ESA & NASA; Acknowledgement: E. Olszewski (U. Arizona) HST APOD: 2008 August 3
  12. 12. The M7 Open Star Cluster in Scorpius Credit & Copyright: Allan Cook & Adam Block, NOAO, AURA, NSF APOD: 2005 April 6
  13. 13. http://en.wikipedia.org/wiki/Image:Open_cluster_HR_diagram_ages.gif
  14. 14. In the Center of the Trapezium Credit: J. Bally, D. Devine, & R. Sutherland, D. Johnson (CITA), HST, NASA APOD: 2005 July 10
  15. 15. Star Clusters Young and Old Credit & Copyright: Chris Hetlage APOD: 2006 September 10
  16. 16. Open Star Clusters M35 and NGC 2158 Credit & Copyright: Canada-France-Hawaii Telescope, J.-C. Cuillandre (CFHT), Coelum APOD: 2003 December 15
  17. 17. A Star Cluster in Motion Credit: Adam Block (NOAO) APOD: 2002 July 30
  18. 18. The Rosette Nebula in Hydrogen, Oxygen, and Sulfur Credit: T. A. Rector, B. Wolpa, M. Hanna (AURA/NOAO/NSF) APOD: 2000 January 11
  19. 19. Inside the Eagle Nebula Credit & Copyright: T. A. Rector & B. A. Wolpa, NOAO, AURA APOD: 2006 February 26
  20. 20. Globular Clusters <ul><li>Oldest things known in the universe </li></ul><ul><li>10,000 – 1 million stars </li></ul><ul><li>All born at the same time </li></ul><ul><ul><li>All have the same distance </li></ul></ul><ul><ul><li>All are relatively dim </li></ul></ul><ul><li>Not confined to our Galactic Plane </li></ul><ul><li>Blue stragglers once a mystery </li></ul>
  21. 21. The Colorful Clouds of Rho Ophiuchi Credit: Adam Block, KPNO Visitor Program, NOAO, AURA, NSF APOD: 2007 September 3
  22. 22. Globular Cluster M3 from WIYN Credit & Copyright: S. Kafka & K. Honeycutt (Indiana University), WIYN, NOAO, NSF APOD: 2006 March 12
  23. 23. M3: Inconstant Star Cluster Credit & Copyright: J. Hartman & K. Stanek (Harvard CfA) APOD: 2004 October 12
  24. 24. M13: The Great Globular Cluster in Hercules Credit & Copyright: Eddie Guscott APOD: 2004 May 11
  25. 25. NGC 5139: Omega Centauri Credit & Copyright: Martin Pugh APOD: 2007 April 19
  26. 26. Blue Stragglers in NGC 6397 Credit: Hubble Heritage Team (STScI / AURA), A. Cool (SFSU) et al., NASA APOD: 2003 August 8
  27. 27. NGC 1818: A Young Globular Cluster Credit: Diedre Hunter (Lowell Obs.) et al., HST, NASA APOD: 2002 December 29
  28. 28. M55: Color Magnitude Diagram B.J. Mochejska, J. Kaluzny (CAMK), 1m Swope Telescope APOD: 2001 February 23
  29. 29. The Sombrero Galaxy from HST Credit: Hubble Heritage Team (AURA/STScI /NASA) APOD: 2006 January 15
  30. 30. M13: The Great Globular Cluster in Hercules Credit & Copyright: Eddie Guscott APOD: 2004 May 11

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