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A wind nebula, generating extended X-ray emission, was recently detectedsurrounding Swift J1834.9-0846. This is the first magnetar for which such awind nebula was found. Here, we investigate whether there is a plausiblescenario where the pulsar wind nebula (PWN) can be sustained without the needof advocating for additional sources of energy other than rotational. We dothis by using a detailed radiative and dynamical code that studies theevolution of the nebula and its particle population in time. We find that sucha scenario indeed exists: Swift J1834.9-0846's nebula can be explained as beingrotationally-powered, as all other known PWNe are, if it is currently beingcompressed by the environment. The latter introduces several effects, the mostimportant of which is the appearance of adiabatic heating, being increasinglydominant over the escape of particles as reverberation goes by. The need ofreverberation naturally explains why this is the only magnetar nebula detected,and provides estimates for Swift 1834.9-0846's age.

A rotationally-powered magnetar nebula around Swift J1834.9-0846