"We developed new operations methods for INMS for Cassini's final flight through Enceladus' plume. We conducted extensive simulations, data analyses, and laboratory tests to identify background sources of hydrogen, allowing us to quantify just how much molecular hydrogen was truly originating from Enceladus itself," explained Dr. Rebecca Perryman in the April 13, 2017 SwRI Press Release. Dr. Perryman is INMS operations technical lead.
Dr. Soderblom and his team, including Dr. Maria Zuber, who is the E.A. Griswold Professor of Geophysics and MIT's vice president of research, have published their findings in the September 10, 2015 issue of the journal Geophysical Research Letters.
The fact that Enceladus becomes so extremely distorted suggests that it contains quite a bit of water. A watery moon would, of course, be a flexible one. Therefore, for Enceladus to be as flexible as it apparently is, it must hold either an enormous local ocean or one that is global. Parts of that immense ocean may be pleasantly warm--but other portions might be quite hot.