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Steve Lubow (Space Science Telescope Institute, USA)
Monday 21 October 2024, 14:00-15:00
The Laplace Surface of a Circumplanetary Disk
- đ¤ Speaker: Steve Lubow (Space Science Telescope Institute, USA)
- đ Date & Time: Monday 21 October 2024, 14:00 - 15:00
- đ Venue: MR14 DAMTP and online
Abstract
The Laplace surface is the location of satellite orbits around a planet that do not undergo nodal precession. For a planet with some spin and obliquity, this warped surface coincides with the equator of the tilted planet close to the planet and coincides with the orbital plane of the planet well away from the planet. The orbits of regular satellites in the solar system generally lie close to their Laplace surfaces. Gordon Ogilvie and I have been exploring the shape of the Laplace surface of a circumplanetary disk that has gas pressure. We find that for typical parameters, the circumjovian Laplace surface is quite flat and differs considerably from the classic Laplace surface that is based on satellite orbits. The results have implications for how satellites evolved from their natal circumplanetary disks.
Series This talk is part of the DAMTP Astrophysics Seminars series.
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