You are right that this could be the case, and it's mentioned in at least one of the papers [1] where they say that a better understanding of the physical state

You are right that this could be the case, and it's mentioned in at least one of the papers [1] where they say that a better understanding of the physical state of this gas is needed to estimate its contributions to the baryonic mass. [1] https://arxiv.org/abs/1805.04555 https://arxiv.org/abs/1805.04555 Now we can get to discuss the third paper ;)