Growing up in a rowdy household: a star’s role in shaping the lives of its exoplanets скачать в хорошем качестве

Growing up in a rowdy household: a star’s role in shaping the lives of its exoplanets

Talk by Prof Moira Jardine, University of St Andrews. We will also have the Sky in January. 00:06:01 Main talk 01:04:02 Sky in January 01:37:23 IOTY results Star and their planets are not independent - they evolve together and each can influence the evolution of the other. In this talk I will look particularly at the impact of stars on their planets, especially early in their lives when the star is most active. Some of the emissions from a star might be considered beneficial to a planet – stars after all are the source of the warmth and light that allows plants to grow and life in general to evolve. A planet can have too much of a good thing, however. The very high-energy UV light from a star can damage a planet’s atmosphere and may erode it completely. This is most likely to happen when the star is young and powering huge flares that not only irradiate any planets, but also cause the star to expel expulsion large clouds of hot gas that add to the stripping of exoplanetary atmospheres. Studying other (younger) versions of our Sun can help us to understand these processes and to see the evolution of our own solar system in the context of other stars.