Upon reading about this galaxy I was curious about the gas surrounding it. This galaxy is a field galaxy so is not under the influence of any nearby galaxies. It is elliptical so I do not think it has any average rotation. It is approximately 40,000 parsecs in diameter and is surrounded by a 10,000,000 degree C cloud of gas with a diameter of 120,000 parsecs. According to various descriptions about this galaxy, there is not enough mass in the galaxy itself to hold the gas cloud in place wiithout adding in dark matter, and the amount of dark matter required is considerable, about 10 times the mass of the galaxy. My question is why would this gas would go anywhere (even without dark matter) considering the isolation of the galaxy. It's temperature would cause it to stay a considerable distance from the galaxy, but why would it leave the vicinity of the galaxy at all when there would be no nearby sideways solar winds to blow it off or nearby gravity to pull it away?