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Title:
Studies of bipolar nebulae. VI - Optical spectrophotometric mapping of GL 2688 /the Cygnus EGG Nebula/
Authors:
Cohen, M.; Kuhi, L. V.
Affiliation:
AA(NASA, Ames Research Center, Moffett Field, Calif.), AB(California, University, Berkeley, Calif.)
Publication:
Astronomical Society of the Pacific, Publications, vol. 92, Oct.-Nov. 1980, p. 736-745. (PASP Homepage)
Publication Date:
10/1980
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL MAPS, NEBULAE, OPTICAL EMISSION SPECTROSCOPY, POSITION (LOCATION), STELLAR SPECTROPHOTOMETRY, CARBON, GRANULAR MATERIALS, LIGHT SCATTERING, MOLECULAR SPECTRA, OPTICAL SCANNERS, RESONANCE FLUORESCENCE, SILICON CARBIDES
Comment:
A&AA ID. AAA028.134.041
DOI:
10.1086/130739
Bibliographic Code:
1980PASP...92..736C

Abstract

Optical scanner spectra are presented for ten positions in the lobes of GL 2688. Color gradients exist across the nebulae, probably due to systematic variations in the sizes of typical scattering grains. Molecular emissions C2, C3, and SiC2 are found, similar to the spectra of comets. Resonance fluorescence seems to be indicated.

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