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Paper Explainer: Applying Liouville's Theorem to Gaia Data

3 Jul 2019, 00:10 UTC
Paper Explainer: Applying Liouville's Theorem to Gaia Data
(200 words excerpt, click title or image to see full post)

Cartoon of the structure of dark matter objects. From Buckley and Peter




This is an explainer for my recent paper with David Hogg and Adrian Price-Whelan. This is a very different kind of paper for me, as evidenced by the fact that it is coming out on arXiv’s astro-ph (astrophysics) list and not even cross-listed to hep-ph (high energy phenomenology). In the end, the goal of the research that produced this paper is to learn about dark matter, but this paper by itself barely mentions the subject. There is a connection though.
One of my research interests of late (as described in detail in my paper with Annika Peter) is trying to learn about the particle physics of dark matter by studying gravitationally bound systems of dark matter in the Universe, and seeing if their properties are consistent with a “vanilla” type of dark matter without significant non-gravitational interactions, or if there is some evidence of new dark matter physics within those objects.
The type of dark matter system I think has a lot of promise are the smallest dark matter structures: collections of dark matter ...

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