Photo evaporation

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Photo evaporation
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Photo evaporation is the effect when a young stellar object (YSO) disperses its disk by radiation. The radiation interacts with matter and thus accelerates it outwards. This effect is only noticeable when there is sufficient radiation strength, such as coming from nearby O and B type stars or when the YSO starts its own hydrogen burning.

The disk is composed of gas and dust. The gas, consisting mostly of light elements such as hydrogen and helium, is mainly affected by the effect, causing the ratio between gas and dust to increase.

Because of this effect, the presence of massive stars in a star forming region is thought to have a great effect on planet formation from the disk around a YSO. Though it is not yet clear if this effect deccelerates or accelerates it.
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Retrieved from "http://en.wikipedia.org/wiki/Photo_evaporation"

Categories: Astronomy stubs | Stellar astronomy
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