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Gravitational Waves from Axion Stars

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If you have a question about this talk, please contact Michalis Agathos.

I will talk about the GW signatures from the collisions of Axion Stars—which are long-lived non-topological solutions of massive scalar fields. I will discuss their stability and their possible end-states, dispersion or Black Hole formation. I will describe the technical challenges and present the GW wave forms of such collisions calculated using the numerical relativity code GRCHOMBO . I will show that for black hole end states, the total gravitational waves energy released in such collisions is more than that of BH-BH collisions of equal masses by a significant amount. If you are interested to explore these exotic events in Virtual Reality, please stay after the question session.

This talk is part of the DAMTP Friday GR Seminar series.

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