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Lecture15 Lecture15 Presentation Transcript

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