Spatial observations of dust emission in NGC 7027

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/113271· OSTI ID:6636189

Bentley, A F

NGC 7027 was mapped in each of five spectral bands between 8.7 and 23 ..mu..m with a spatial resolution of 3.5 arcsec. Two new scientific results are presented: (1) Analysis of the observations shows that the dust in NGC 7027 contains two spatially distinct components, one of which is associated with and links the unidentified emission features at 8.6 and 11.3 ..mu..m; the second component may be graphite. (2) High-quality observations indicate that thermal emission by dust in NGC 7027 is spatially coextensive with emission by ionized hydrogen over a broad spectral range in the midinfrared (approx.8--28 ..mu..m). No significant emission above the approx.1% level was found outside the region of ionized hydrogen in any spectral band observed. The intensity distribution of the observed infrared emission was successfully modeled by emission from within the walls of a hollow cylinder, similar to the model for 5-GHz radio emission proposed by Scott (Mon. Not. R. Astron. Soc. 161, 35P (1973)).

• Research Organization: Department of Physics and Astronomy, Wyoming Infrared Observatory, University of Wyoming, Laramie, Wyoming 82070
• OSTI ID: 6636189
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 87:12; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON
CHARGED PARTICLES
COSMIC DUST
DISTRIBUTION
DUSTS
ELECTROMAGNETIC RADIATION
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HYDROGEN IONS
INFRARED RADIATION
IONS
MINERALS
NEBULAE
NONMETALS
PLANETARY NEBULAE
RADIATIONS
SPATIAL DISTRIBUTION