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arXiv · 2009.03003

Three problems of superfluid dark matter and their solution

Tobias Mistele
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Abstract

In superfluid dark matter (SFDM), the phonon field plays a double role: It carries the superfluid's energy density and it mediates the MOND-like phonon force. We show that these two roles are in tension with each other on galactic scales: A MOND-like phonon force is in tension with a superfluid in equilibrium and with a significant superfluid energy density. To avoid these tensions, we propose a model where the two roles are split between two different fields. This also allows us to solve a stability problem in a more elegant way than standard SFDM. We argue that the standard estimates for the size of a galaxy's superfluid core need to be revisited.

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Tobias Mistele. 2020-09-07. Three problems of superfluid dark matter and their solution. https://doi.org/10.1088/1475-7516/2021/01/025

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