Magnetic Coupling between a “Hot Jupiter” Extrasolar Planet and Its Pre-Main-Sequence Central Star

<p>In order to understand the short-period pile-up of extrasolar planets, the magnetic torque of a pre-main-sequence central star on a single orbiting "hot Jupiter" planet is calculated. The star's magnetic field is modeled as a dipole magnetic field. The time-dependent stellar radius is calculated for four different stellar mass sizes; <em>2M</em><em>sum </em><em>\.5M</em><em>sum</em> <em>\M</em><em>sum </em>and <em>0.5M</em><em>surt</em><em>. </em>The minimum planetary ionization for the giant gas planet to be nearly frozen to the magnetic field lines is calculated. The changing angular momentum of an orbiting body was balanced with the magnetic torque of the central star to provide results which support that the central star is capable of halting the migration of Type II planets. The magnetic braking effect that the planet has on the central star is enough to push out the planet during its inward migration and spin-down the star's angular rotation. This investigation shows that the magnetic torque is a viable mechanism to explain the short period pile-up of many extrasolar planets.</p>

Name thesis:degree_name

Master of Science in Space Science

Level thesis:degree_level

Thesis - Open Access

Discipline thesis:degree_discipline

Physical Sciences

Year

2006

Author dc:creator

• Alarcon, Brooke E.

Contributors dc:contributor

• Mark Anthony Reynolds
• Lance Erickson

• magnetic coupling
• Hot Jupiter
• extrasolar
• stars
• Atmospheric Sciences
• Physics

Repository record dc:identifier

https://commons.erau.edu/db-theses/23

OAI identifier oai:identifier

oai:commons.erau.edu:db-theses-1004