The spectrum of NGC 7027

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Publications of the Astronomical Society of the Pacific; (USA)

DOI:https://doi.org/10.1086/132607· OSTI ID:6917633

Keyes, C D; Aller, L H; Feibelman, W A ^[1]

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1. California Univ., Los Angeles (USA) NASA, Goddard Space Flight Center, Greenbelt, MD (USA)

IUE and echelle spectrograph observations of the planetary nebular NGC 7027 are analyzed to obtain nebular plasma diagnostics and chemical abundances. It is found that most of the nebular plasma has a density of about 60,000/cu cm and a temperature of about 14,000 K. The results suggest that the stellar radiation field is greatly enhanced shortward of 130 A because of a dense non-LTE wind. It is found that the chemical composition is that of a normal C-rich object, rather than that of a N-rich object. 76 refs.

• OSTI ID: 6917633
• Journal Information: Publications of the Astronomical Society of the Pacific; (USA), Journal Name: Publications of the Astronomical Society of the Pacific; (USA) Vol. 102; ISSN PASPA; ISSN 0004-6280
• 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
ABUNDANCE
CHEMICAL COMPOSITION
ELEMENT ABUNDANCE
EQUILIBRIUM
INTERSTELLAR SPACE
LTE
NEBULAE
PLANETARY NEBULAE
PLASMA DENSITY
PLASMA DIAGNOSTICS
SPACE
SPECTROSCOPY
STELLAR RADIATION