High resolution spectra of compact planetary nebulae

Details High resolution spectra of compact planetary nebulae High resolution spectra of compact planetary nebulae

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26as...62...17o&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 62, Oct. 1985, p. 17-21. CNR-supported research.

Astronomy and Astrophysics

Astrophysics

5

Emission Spectra, H Alpha Line, Line Spectra, Planetary Nebulae, High Resolution

Scientific paper

The central parts of six southern planetary nebulae (PNs) were observed with the CES spectrograph at the CAT telescope of the ESO in the 6536-6593 A spectral range at a resolution of 80,000. All these nebulae are found to be in a quite early evolutionary phase, and present low or moderate H-alpha and forbidden N II expansion velocities. They fit the evolutionary behaviors suggested by Sabbadin (1984) for this class of objects, a conclusion confirmed by calculations of the ionized mass from F(H-beta), the apparent radius, and the distance.

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