Astro 1050     Fri., Nov. 14, 2004

Chapter 13: Galaxies

The Hubble Deep Field

The Hubble Ultra Deep Field

“Tuning Fork” Diagram

Types of Galaxies  (pg. 254-255)

Spiral types

Elliptical Galaxy: M87

Irregular Galaxies: Magellanic Clouds

Properties of Galaxies

The Original Hubble Law

The Hubble Law using galaxies with visible Cepheid variables.

Hubble Law Example
v_r = H₀ d
  with H₀=0.5 (mile/hr)/mile

Hubble Law Example
v_r = H₀ d
  with H₀=0.5 (mile/hr)/mile

Hubble Law Example
v_r = H₀ d
  with H₀=0.5 (mile/hr)/mile

Hubble Law Example using relative v_r and relative d

The Hubble Law using secondary distance indicators
H_o = 72 ±8 km/s/Mpc

The Local Group of Galaxies

The Coma Cluster

Evolution of Galaxies

Effects of Collisions

Interacting Galaxies: The Antennae

Interacting Galaxies: Cartwheel

Simulation of the Cartwheel Encounter

The Hubble Deep Field

Evidence for “Hierarchical” Galaxy Formation from the Hubble Deep Field

What this might look like

Chapter 13: Galaxies