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ASTR 160 - Frontiers and Controversies in Astrophysics

Lecture 06 - Microlensing, Astrometry and Other Methods. The class begins with a discussion on transits - important astronomical events that help astronomers to find new planets. The event occurs when a celestial body moves across the face of the star it revolves around and blocks some of its light. By calculating the amount of light that is being obscured astronomers can obtain important information about both star and planet, such as size, density, radial velocity and more. The concept of planetary migration is explained in order to better understand the dramatic differences between bodies in the Inner and Outer Solar System. Finally, potential problems in the Solar System that may occur as a result of migration are addressed. (from oyc.yale.edu)

Lecture 06 - Microlensing, Astrometry and Other Methods

Time Lecture Chapters
[00:00:00] 1. Complexities and New Observations on Hot Jupiters
[00:07:38] 2. Discovery of Planetary Transits
[00:19:53] 3. Limits of Finding Planets Directly from Transits
[00:28:54] 4. Metallicity and Planetary Migration
[00:43:32] 5. Consequences and Limits of the Idea of Planetary Migration

References
ASTR 160: Lecture 6 - Microlensing, Astrometry and Other Methods
Instructor: Professor Charles Bailyn. Class Notes Lecture 6 [pdf]. Problem Set 2 and Solutions [pdf]. Transcript [html]. Audio [mp3]. Download Video [mov].

Go to the Course Home or watch other lectures:

Lecture 01 - Introduction
Lecture 02 - Planetary Orbits
Lecture 03 - Our Solar System and the Pluto Problem
Lecture 04 - Discovering Exoplanets: Hot Jupiters
Lecture 05 - Planetary Transits
Lecture 06 - Microlensing, Astrometry and Other Methods
Lecture 07 - Direct Imaging of Exoplanets
Lecture 08 - Introduction to Black Holes
Lecture 09 - Special and General Relativity
Lecture 10 - Tests of Relativity
Lecture 11 - Special and General Relativity (cont.)
Lecture 12 - Stellar Mass Black Holes
Lecture 13 - Stellar Mass Black Holes (cont.)
Lecture 14 - Pulsars
Lecture 15 - Supermassive Black Holes
Lecture 16 - Hubble's Law and the Big Bang
Lecture 17 - Hubble's Law and the Big Bang (cont.)
Lecture 18 - Hubble's Law and the Big Bang (cont.)
Lecture 19 - Omega and the End of the Universe
Lecture 20 - Dark Matter
Lecture 21 - Dark Energy and the Accelerating Universe and the Big Rip
Lecture 22 - Supernovae
Lecture 23 - Other Constraints: The Cosmic Microwave Background
Lecture 24 - The Multiverse and Theories of Everything