High-resolution radio continuum observations of compact planetary nebulae

Details High-resolution radio continuum observations of compact planetary nebulae High-resolution radio continuum observations of compact planetary nebulae

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...378..599a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 378, Sept. 10, 1991, p. 599-610. Research supported by NSERC.

Astronomy and Astrophysics

Astronomy

44

Continuous Spectra, Planetary Nebulae, Radio Astronomy, Astronomical Maps, Brightness Temperature, High Resolution, Sky Surveys (Astronomy), Very Large Array (Vla)

Scientific paper

Fifteen GHz radio continuum observations of 19 compact planetary nebulae are reported. The high resolution (about 0.1 arcsec) images obtained allowed detailed examination of the structures of these nebulae. Most of these objects have very high radio surface brightness temperatures and critical frequencies, suggesting that they are very young planetary nebulae. Most show a 'bipolar' central structure, consistent with an ellipsoidal shell viewed at an angle, and may also show extended halo structure outside of the shell, probably representing remnant material left over from the asymptotic giant branch progenitor.

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