57 citations · 252 across the 9 of their papers we have counts for
9 papers
Hot bubbles of planetary nebulae with hydrogen-deficient winds - II. Analytical approximations with application to BD+303639
René Heller, Ralf Jacob, Detlef Schönberner +1
The first high-resolution X-ray spectroscopy of the planetary nebula BD+303639 allowed to study X-ray emitting "hot bubbles" (HBs) of planetary nebulae in unprecedented det…
Analysis of the X-ray spectrum of the hot bubble of BD+30°3639
Detlef Schönberner, Ralf Jacob, René Heller +1
We developed a model for wind-blown bubbles with temperature and density profiles based on self-similar solutions including thermal conduction. We constructed also heat-conduction…
The evolution of planetary nebulae. VIII. True expansion rates and visibility times
R. Jacob, D. Schoenberner, M. Steffen
The visibility time of planetary nebulae (PNe) in stellar systems is an essential quantity for estimating the size of a PN population in the context of general population studies.…
Diffuse X-ray Emission from Planetary Nebulae with Nebular O VI
N. Ruiz, Y. -H. Chu, R. A. Gruendl +4
The presence of O VI ions can be indicative of plasma temperatures of a few times 10^5 K that is expected in heat conduction layers between the hot shocked stellar wind gas at seve…
Modeling the diffuse X-ray emission of Planetary Nebulae with different chemical composition
M. Steffen, C. Sandin, R. Jacob +1
Based on time-dependent radiation-hydrodynamics simulations of the evolution of Planetary Nebulae (PNe), we have carried out a systematic parameter study to address the non-trivial…
The evolution of planetary nebulae VII. Modelling planetary nebulae of distant stellar systems
D. Schönberner, R. Jacob, C. Sandin +1
By means of hydrodynamical models we do the first investigations of how the properties of planetary nebulae are affected by their metal content and what can be learned from spatial…