An analysis of the radio continuum spectra of 18 compact planetary nebulae, based on published flux densities plus new observations at 327 MHz with the Westerbork Synthesis Radio Telescope, is presented. It is shown that the radio spectra are well represented by a model in which the radio emission arises in a photon-limited, ionized shell of a stellar wind type envelope. A comparison of predicted and observed angular radii indicates a radial density power law in the shell of the form r exp -2. The model also accounts for an evolutionary trend in the radio spectra revealed by a correlation between spectral shape and the linear dimensions of the nebulae. The results suggest that planetary nebulae are ionized shells of stellar wind ejecta prod...
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is th...
We present an updated and newly compiled radio-continuum data base for Macquarie/AAO/Strasbourg Hα (...
We present the first radio continuum images of the 'Engraved Hourglass' planetary nebula (PN) MyCn 1...
An analysis of the radio continuum spectra of 18 compact planetary nebulae, based on published flux ...
Radio continuum emission of planetary nebulae is a rich source of information about their structure ...
Abstract — Radio continuum emission has been detected from a planetary nebula in the Large Magellani...
We have analysed the radio fluxes for 264 planetary nebulae for which reliable measurements of fluxe...
Radio continuum emission has been detected from a planetary nebula in the Large Magellanic Cloud: th...
The thesis describes the results of extended radio observations of pn, both in continuum and spectra...
Midcourse Space eXperiment and Infrared Astronomical Satellite colour diagnostics as well as OH mase...
Midcourse Space eXperiment and Infrared Astronomical Satellite colour diagnostics as well as OH mase...
We report an Australia Telescope Compact Array (ATCA) radio-continuum observations of 26 planetary n...
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is th...
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is th...
We report an Australia Telescope Compact Array (ATCA) radio-continuum observations of 26 planetary n...
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is th...
We present an updated and newly compiled radio-continuum data base for Macquarie/AAO/Strasbourg Hα (...
We present the first radio continuum images of the 'Engraved Hourglass' planetary nebula (PN) MyCn 1...
An analysis of the radio continuum spectra of 18 compact planetary nebulae, based on published flux ...
Radio continuum emission of planetary nebulae is a rich source of information about their structure ...
Abstract — Radio continuum emission has been detected from a planetary nebula in the Large Magellani...
We have analysed the radio fluxes for 264 planetary nebulae for which reliable measurements of fluxe...
Radio continuum emission has been detected from a planetary nebula in the Large Magellanic Cloud: th...
The thesis describes the results of extended radio observations of pn, both in continuum and spectra...
Midcourse Space eXperiment and Infrared Astronomical Satellite colour diagnostics as well as OH mase...
Midcourse Space eXperiment and Infrared Astronomical Satellite colour diagnostics as well as OH mase...
We report an Australia Telescope Compact Array (ATCA) radio-continuum observations of 26 planetary n...
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is th...
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is th...
We report an Australia Telescope Compact Array (ATCA) radio-continuum observations of 26 planetary n...
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is th...
We present an updated and newly compiled radio-continuum data base for Macquarie/AAO/Strasbourg Hα (...
We present the first radio continuum images of the 'Engraved Hourglass' planetary nebula (PN) MyCn 1...