Lecture15

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PH1600: Introductory AstronomyLecture 15: Star Clusters

PH1600: Introductory AstronomyLecture 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/

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Wikipedia entries:

HR Diagram Cepheid variable Open cluster Globular cluster

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Cepheid variable stars

Longer periods means greater absolute brightness

See link: http://www.youtube.com/watch?v=NNPAlAZ_iKY

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Andromeda Nebula: Var!Credit: Mount Wilson Observatory Historical ArchiveAPOD: 1996 April 6

The Cepheids of M100Credit: 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 ClusterCredit & Copyright: Robert GendlerAPOD: 2006 January 9

Perseid Fireball Over JapanCredit & Copyright: Katsuhiro Mouri & Shuji Kobayashi (Nagoya City Science Museum / Planetarium)APOD: 2004 August 13

Open Cluster NGC 290: A Stellar Jewel BoxCredit: ESA & NASA; Acknowledgement: E. Olszewski (U. Arizona) HSTAPOD: 2008 August 3

The M7 Open Star Cluster in ScorpiusCredit & 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 TrapeziumCredit: J. Bally, D. Devine, & R. Sutherland, D. Johnson (CITA), HST, NASA APOD: 2005 July 10

Star Clusters Young and OldCredit & Copyright: Chris Hetlage APOD: 2006 September 10

Open Star Clusters M35 and NGC 2158Credit & Copyright: Canada-France-Hawaii Telescope, J.-C. Cuillandre (CFHT), Coelum APOD: 2003 December 15

A Star Cluster in MotionCredit: Adam Block (NOAO)APOD: 2002 July 30

The Rosette Nebula in Hydrogen, Oxygen, and SulfurCredit: T. A. Rector, B. Wolpa, M. Hanna (AURA/NOAO/NSF)APOD: 2000 January 11

Inside the Eagle NebulaCredit & 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 OphiuchiCredit: Adam Block, KPNO Visitor Program,

NOAO, AURA, NSF APOD: 2007 September 3

Globular Cluster M3 from WIYNCredit & Copyright: S. Kafka & K. Honeycutt (Indiana University), WIYN, NOAO, NSF APOD: 2006 March 12

M3: Inconstant Star ClusterCredit & Copyright: J. Hartman & K. Stanek (Harvard CfA)APOD: 2004 October 12

M13: The Great Globular Cluster in HerculesCredit & Copyright: Eddie Guscott APOD: 2004 May 11

NGC 5139: Omega CentauriCredit & Copyright: Martin Pugh APOD: 2007 April 19

Blue Stragglers in NGC 6397Credit: Hubble Heritage Team (STScI / AURA), A. Cool (SFSU) et al., NASA APOD: 2003 August 8

NGC 1818: A Young Globular ClusterCredit: Diedre Hunter (Lowell Obs.) et al., HST, NASA APOD: 2002 December 29

M55: Color Magnitude DiagramB.J. Mochejska, J. Kaluzny (CAMK), 1m Swope Telescope APOD: 2001 February 23

The Sombrero Galaxy from HSTCredit: Hubble Heritage Team (AURA/STScI /NASA)APOD: 2006 January 15

M13: The Great Globular Cluster in HerculesCredit & Copyright: Eddie Guscott APOD: 2004 May 11