A research team has investigated long-term X-ray variability in the neutron star NGC 7793 P13, an object thought to be driven by supercritical accretion, where an extraordinary amount of gas falls onto the object and emits intense X-rays. The team found a relation between the X-ray luminosity and th e rotation velocity, which could provide clues to reveal the supercritical accretion mechanism. ...read more read less