Three problems of superfluid dark matter and their solution

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.

arXiv comment34 pages, 5 figures, published version

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• Aether scalar tensor theory confronted with weak lensing data at small accelerations
• Galactic Mass-to-Light Ratios With Superfluid Dark Matter
• Cherenkov radiation from stars constrains hybrid MOND dark matter models
• Acausality in Superfluid Dark Matter and MOND-like Theories
• Superfluid dark matter in tension with weak gravitational lensing data
• Quantized Vortices in Superfluid Dark Matter