Kes 75: Energy Budgets of a Young Pulsar Wind Nebula Around a High-Field Pulsar

This paper computes the energy, density and acceleration budgets of Kes 75 from a small set of adopted, published input values, using the relations stated in the Methods and a deposited script that reproduces every number. The timing parameters give a spin-down power of 8.03e+36 erg per second, a surface field of 4.85e+13 gauss and a characteristic age of only 733 years, younger than the remnant that hosts it on most age estimates, which forces either a birth period close to the present one or a braking history unlike the dipole formula. Between an adopted birth period of 50 milliseconds and the present day, rotation has surrendered 7.71e+48 erg; the nebula's expansion at the adopted mass and speed uses 3.18e+48 erg, a fraction 0.413, leaving the bulk for the particle and field content. The calculation is a computation from stated assumptions, not a measurement, and each headline result is reported together with the diagnostic that tests whether the assumed evolutionary phase applies to this object.