Detecting new planets in transiting systems

ResearchWorks/Manakin Repository

Search ResearchWorks

Advanced Search


My Account


Related Information

Detecting new planets in transiting systems

Show full item record

Title: Detecting new planets in transiting systems
Author: Steffen, Jason, 1975-
Abstract: I present an initial investigation into a new planet detection technique that uses the transit timing of a known, transiting planet. The transits of a solitary planet orbiting a star occur at equally spaced intervals in time. If a second planet is present; dynamical interactions within the system will cause the time interval between transits to vary. These transit time variations can be used to infer the orbital elements of the unseen, perturbing planet. I show analytic expressions for the amplitude of the transit time, variations in several limiting cases. Under certain conditions the transit time variations can be comparable to the period of the transiting planet. I also present the application of this planet detection technique to existing transit, observations of the TrES-1 and HD209458 systems. While no convincing evidence for a second planet in either system was found from those data. I constrain the mass that a perturbing planet could have as a function of the semi-major axis ratio of the two planets and the eccentricity of the perturbing planet. Near low-order, mean-motion resonances (within about 1% fractional deviation), I find that a secondary planet must generally have a mass comparable to or less than the mass of the Earth---showing that these data are the first to have sensitivity to sub Earth-mass planets. These results show that TTV will be an important tool in the detection and characterization of extrasolar planetary systems.
Description: Thesis (Ph. D.)--University of Washington, 2006.

Files in this item

Files Size Format View
3224298.pdf 5.214Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record