Poster abstract details
Detection of Diffuse X-ray Emission from Planetary Nebulae with Nebular O VI Emission or Absorption
Abstract
Shocked stellar winds confined in the central cavities of planetary nebulae (PNe) are sources of diffuse soft X-ray emission. Chandra and XMM-Newton observations of PNe have started to reveal several trends in the occurrence of X-ray emission, X-ray luminosity and temperature of the hot plasma. Here we present Chandra X-ray observations of IC 418, NGC 2392, and NGC 6826, three PNe with indications of the presence of collisionally ionized O~{\sc vi} at the interface layer between the hot interior and the cool nebular shell. X-ray emission is detected in all of these three PNe, thus indicating
that nebular O~{\sc vi} emission or absorption is an excellent diagnostic for the presence of hot gas from shocked fast winds.
that nebular O~{\sc vi} emission or absorption is an excellent diagnostic for the presence of hot gas from shocked fast winds.