Pseudo-resonance absorption lines in planetary nebulae - Discovery?

Details Pseudo-resonance absorption lines in planetary nebulae - Discovery? Pseudo-resonance absorption lines in planetary nebulae - Discovery?

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.175...15g&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 175, no. 1, Jan. 1991, p. 15-21. Research supported by National Astronomy

Astronomy and Astrophysics

Astrophysics

Absorption Spectra, Line Spectra, Planetary Nebulae, Resonance Lines, Carbon, Iue, Magnesium, Silicon, Spectrum Analysis, Sulfur

Scientific paper

An attempt has been made to show, as a result of careful analysis of IUE spectral recordings for a group of planetary nebulae, that the existence of one pseudoresonance line 1300 (Si III) is without doubt at least in spectra of three planetary nebulae: NGC 2610, NGC 3587, and NGC 6891. The presence of this line in the spectra of the other three planetary nebulae, NGC 6210, IC 3568, and IC 4776, seems to be probable. Also analyzed were the role of interstellar selective absorption; the blending effect by the resonance lines of Si II, O I, and S I in the formation of the pseudoresonance line 1300 (Si III); and the possibility of formation of this line in the photosphere of the central star of the nebula.

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