Hot bubbles of planetary nebulae with hydrogen-deficient winds - II. Analytical approximations with application to BD+30${}^{\circ }$3639

René Heller, Ralf Jacob, Detlef Schönberner +1

The first high-resolution X-ray spectroscopy of the planetary nebula BD+30${}^{\circ }$3639 allowed to study X-ray emitting "hot bubbles" (HBs) of planetary nebulae in unprecedented det…