Spatial studies of the middle infrared spectral features in NGC 7027

Details Spatial studies of the middle infrared spectral features in NGC 7027 Spatial studies of the middle infrared spectral features in NGC 7027

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202.1233a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 202, Mar. 1983, p. 1233-1244. Research supported by the Science and Eng

Astronomy and Astrophysics

Astronomy

61

Astronomical Spectroscopy, Infrared Astronomy, Planetary Nebulae, Spatial Resolution, Thermal Emission, Cosmic Dust, Emission Spectra, Graphite, H I Regions, High Resolution, Infrared Spectra, Ionized Gases, Line Spectra, Spectral Resolution

Scientific paper

High spatial resolution spectral observations of the planetary nebula NGC 7027 in the 10-micron region are reported. These show that the unidentified infrared features at 8.65 and 11.25 microns originate from a more extensive region than the shell of ionized gas; the data are consistent with these features arising entirely from the contiguous neutral region. This situation places further constraints upon a fluorescent excitation mechanism (Allamandola, Greenberg and Norman, 1979) and it is argued that the features are due to thermal emission from surface bonds on graphite grains in an H I region (Barlow, 1982, in preparation; Dwek et al., 1980).

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