Planetary Migration In A Disk: Type 1
Автор: AstroPhil
Загружено: 2022-10-21
Просмотров: 2393
Описание:
Planets do not always stay on the same orbit. There are many different mechanisms which can alter the orbit of a planet and can explain why we find exoplanets in usual locations. For example, Hot Jupiter's can not form where we find them as there is not enough mass in the circumstellar disk to grow to such large sizes where we see them. In this video we are interested how planets migrate inwards or outwards in the disks that planets form in around young stars.
There are three main types of planetary migration in a disk (Type 1, 2 & 3). Type 1 migration concerns small terrestrial size planets that do not significantly alter the structure of the disk they are embedded in. Here, planets create spiral density waves in inner and outer disk. These spiral waves exert a torque on the planet. Typically the outer wave exerts a greater torque on the planet than the inner wave. This causes the planet to lose angular momentum, sending it inwards towards the star.
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