Lecture18

Lecture18 - Previous Lecture Disk Galaxy Rotation Curves...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Previous Lecture Disk Galaxy Rotation Curves shape: flat at large radii amplitude: 100 – 300 km/s, depending on mass determines total mass and mass distribution Milky Way Data r Sun = 8 kpc v cir, Sun = 220 km/sec P Sun = 2x10 8 yr Spiral Structure possibly a long-lived density wave possibly temporary but repeating structures Milky Way Center 4x10 6 M sun black hole
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Galaxies 1920: Shapley-Curtis Debate concerning the nature of the “nebulae” clouds in the Milky Way or other “Island Universes” Shapley (local clouds, big Galaxy) had better arguments than Curtis (other galaxies, Kapteyn MW) observations in the 1920’s showed that Curtis’ view was more correct – the nebulae were other galaxies antwrp.gsfc.nasa.gov/diamond_jubilee/debate20.html We live in a vast universe of galaxies
Background image of page 2
Galaxy Types Basic classification system by Hubble Spirals (or disks) like the Milky Way Ellipticals – relatively featureless blobs Irregulars – complex shapes “Tuning Fork” diagram
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Spiral Galaxies normal barred Sa
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/31/2012 for the course 750 110 taught by Professor Ericgawaiser during the Fall '10 term at Rutgers.

Page1 / 14

Lecture18 - Previous Lecture Disk Galaxy Rotation Curves...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online