The Spectrum of the Planetary Nebula NGC 6790

Details The Spectrum of the Planetary Nebula NGC 6790 The Spectrum of the Planetary Nebula NGC 6790

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasp..108..488a&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.108, p.488

Astronomy and Astrophysics

Astronomy

23

Planetary Nebulae: Individual: Ngc 6790, Ism: Abundances

Scientific paper

International Ultraviolet Explorer (IUE) and optical region spectroscopic observations are presented for the medium excitation planetary nebula (PN), NGC 6790, which displays a rich spectrum permitting application of several diagnostic ratios and the calculation of a number of ionic concentrations, N(ion)/N(H+). NGC 6790 seems to be a relatively young object which may represent a stage of development only slightly beyond that of a PN such as Hb 12. The diagnostics for NGC 6790 suggest a rather large density range, although not one as great as that found in IC 4997. An attempt is made to calculate a plausible simple spherically symmetrical model. We suggest that NGC 6790 may serve as a prototype "standard" for PN of intermediate age, density, and evolutionary development. Further modeling attempts would appear inappropriate until images of high spatial resolution become available. (SECTION: Interstellar Medium and Nebulae)

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