Emission features in the spectrum of NGC 7027 near 3. 3 microns at very high resolution

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169683· OSTI ID:5758059

Lowe, R P; Moorhead, J M; Wehlau, W H; Maillard, J P ^[1]

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1. Western Ontario Univ., London (Canada) CNRS, Institut d'Astrophysique, Paris (France)

A very high resolution spectrum is presented of the planetary nebula NGC 7027 over a 200/cm interval centered at 2950/cm, and the features found are described: (1) nebular continuum, (2) atomic recombination lines of H and He II, and (3) three broader emission features of uncertain origin. For the latter the first evidence is presented that the 3.46 micron feature and possibly the 3.40 micron feature are resolvable into a sequence of narrower features. The interpretation of the broader features is discussed in terms of the hypothesis of identification with emission by polycyclic aromatic hydrocarbons. 18 refs.

• OSTI ID: 5758059
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 368; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AROMATICS
CHEMICAL COMPOSITION
ELEMENTS
EMISSION SPECTRA
FLUIDS
GASES
HELIUM
HYDROCARBONS
HYDROGEN
INFRARED SPECTRA
NEBULAE
NONMETALS
ORGANIC COMPOUNDS
PLANETARY NEBULAE
POLYCYCLIC AROMATIC HYDROCARBONS
RARE GASES
RECOMBINATION
RESOLUTION
SPECTRA
SPECTROSCOPY