Spatial studies of the middle infrared spectral features in NGC 7027
نویسندگان
چکیده
منابع مشابه
A new Unidentified Far Infrared Band in NGC 7027
We report on the detection of a molecular band centered at ∼98 μm (∼102 cm), observed with the Infrared Space Observatory in the young Planetary Nebula NGC 7027. The band structure and intensity can not be reproduced by atomic fine structure lines, recombination lines or by the rotational emission of abundant molecules. We discuss the possible contribution of the low–energy bending modes of pur...
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Hyperspectral sensors are important tools in monitoring the phenomena of the Earth due to the acquisition of a large number of spectral bands. Hyperspectral image classification is one of the most important fields of hyperspectral data processing, and so far there have been many attempts to increase its accuracy. Spatial features are important due to their ability to increase classification acc...
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We present deep optical spectra of the archetypal young planetary nebula (PN) NGC7027, covering a wavelength range from 3310 to 9160 Å. The observations were carried out by uniformly scanning a long slit across the entire nebular surface, thus yielding average optical spectra for the whole nebula. A total of 937 emission features are detected. The extensive line list presented here should prove...
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Infrared spectra of NGC 7027 and NGC 6543 ranging from 2.4 to 45 m were obtained with the Short Wavelength Spectrometer on board the Infrared Space Observatory. A first analysis of these spectra, with the aid of photo-ionization models, is presented. We report the first detection of the [Arvi] 4.53 m and [Nevi] 7.65 m lines in the spectrum of NGC 7027. When compared with older observations it i...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1983
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/202.4.1233