Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216..776j&link_type=abstract
Astrophysical Journal, Part 1, vol. 216, Sept. 15, 1977, p. 776-783.
Astronomy and Astrophysics
Astrophysics
6
Fabry-Perot Interferometers, Planetary Nebulae, Stellar Evolution, Stellar Mass Ejection, Stellar Motions, Astronomical Spectroscopy, Atomic Excitations, Gas Expansion, Normal Density Functions, Stellar Envelopes, Stellar Rotation, Supergiant Stars, White Dwarf Stars
Scientific paper
Results are discussed for photoelectric scans with a Fabry-Perot interferometer of 12 planetary nebulae that are linearly small and possibly in an early stage of evolution. The scans were performed around the H-alpha line at 6563 A and the forbidden O III line at 5007 A with an effective velocity resolution for point sources of about 11 km/s (FWHM). Previous radio, optical, and infrared observations of the 12 objects are reviewed. Mass motions implied by the Fabry-Perot profiles are examined, and five objects are identified which have been previously observed to show a stellar continuum.
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