ASTR 1020 Spring 2012: Study Guide for Quiz #5

Topics you should know and understand for Quiz #5 (not necessarily a complete list)

ASSIGNED READINGS FOR THIS QUIZ: Sections 24.2 - 24.5; Chapter 25; Sections 26.1 - 26.3.

1) DEFINITIONS: Quasar; QSO; Active Galaxies; Seyfert Galaxies; Radio Galaxies; Double-Lobed Radio Galaxies; Core-Halo Radio Galaxies. Standard Candle; Astronomical Distance Ladder; Hubble's Law; Hubble's Constant; The Great Wall; The Coma Cluster; The Virgo Cluster; The Local Group; The Local Supercluster; The Pisces-Perseus Supercluster; The Andromeda Galaxy; The Large Magellanic Cloud; The Small Magellanic Cloud; The Sagittarius Dwarf Galaxy; The Zone of Avoidance; Cosmological Redshift; Peculiar Velocity; Cosmology; Big Bang; Critical Density; Open Universe; Closed Universe; Flat Universe; The Big Crunch.

2) MATHEMATICAL RELATIONSHIPS: Hubble's Law (v = Hd).

3) OTHER THINGS YOU SHOULD KNOW: What radio galaxies, Seyfert galaxies, and quasars are, and what the main differences are between them; The difference between double-lobed radio galaxies and core-halo radio galaxies; How dark matter is measured in elliptical galaxies and in clusters of galaxies; Why the density of quasars increases with increasing distance from us; the rungs on the Astronomical Distance Ladder (stellar parallax, spectroscopic parallax, Cepheid variables, standard candles, and Hubble's Law), and approximate distances that each method of determining distances is useful for; One way that the age of the Universe is determined; Which type of supernova (I or II) is better as a `standard candle'; The scientific accomplishments of Allan Sandage, Maarten Schmidt, and Carl Jansky.