• 00:00    |    
    Initial credits
  • 00:06    |    
    • Planet formation theory
    • Planet occurrence
    • Ground-based radial velocity
    • Finding planets in space
    • Which occurrence is real data coming from three different methods?
    • Concentrations and clumps
  • 09:08    |    
    Planet definition
  • Naming exoplanets
  • 12:30    |    
    Planet detection techniques
    • Radial velocity
    • Radial velocity definition
    • Context of radial velocity in space
    • Planet mass derivation
    • Calibrating and measuring the shift in space
    • Fundamental limit to planet mass derivation
    • Theoretical curve of radial velocity
    • Concept of minimum mass
    • Radial velocity curves
    • Examples of radial velocity curves
    • Planet mass derivation and measurement
    • Equation of star velocity
    • Center of mass and the distance of the planet of the star
    • Examples of planet mass derivation
    • Answer of planet mass derivation example
    • Controversial planet detections
    • Transits
  • 56:44    |    
  • 57:46    |    
    Final credits

Exoplanet Detection: Techniques I

New Media  | 10 de diciembre de 2013  | Vistas: 22

Sara Seager delivers a lecture on exoplanets and existing planet detection techniques. In this video, Seager describes the basics behind this new science and the revolutionary findings associated to the discovery of new planets. In an extensive introduction to the radial velocity technique, she explains the elementary principles underlying this theory, its spectrum of effectiveness, and limitations to its use. Seager brings students through an in-class example of planet mass derivation using radial velocity amplitude, and shares real-life instances of celestial bodies uncovered by this approach. She reviews key aspects of a the transit method, including the substantial information that can be obtained from planet light curves, and the importance of transit duration. Exoplanets, she says, come in many different forms and sizes, and can be found using many different techniques. The essential challenge lies in recognizing each method’s individual time for success, in order to harness its maximum potential.

See: Exoplanet Detection: Techniques II, for the second half of this lecture.


Astrophysicist and Planetary Scientist at MIT