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The electromagnetic weight loss of compact axion stars

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If you have a question about this talk, please contact Xi Tong .

If dark matter is composed of axions, then axion stars are expected to be abundant in the Universe. In this talk, I will demonstrate in fully non-linear (3+1) numerical relativity the instability of compact axion stars due to the electromagnetic Chern-Simons term. The coupling of the axion to electromagnetism forms the basis of various axion detection experiments. I will show that above a critical coupling constant, compact axion stars are unstable, decaying into a less massive, less compact, remnant. Finally, I’ll address this instability in the context of axion star mergers.

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

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