16-25 micron spectroscopy of the Trapezium and BN-KL source in Orion

Details 16-25 micron spectroscopy of the Trapezium and BN-KL source in Orion 16-25 micron spectroscopy of the Trapezium and BN-KL source in Orion

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...208l.129f&link_type=abstract

Astrophysical Journal, vol. 208, Sept. 15, 1976, pt. 2, p. L129-L132. NSF-supported research;

Astronomy and Astrophysics

Astronomy

27

Cosmic Dust, Infrared Astronomy, Infrared Spectroscopy, Interstellar Matter, Nebulae, Absorption Spectra, Brightness Temperature, Molecular Absorption, Photoconductors, Radiative Transfer

Scientific paper

Spectrophotometric observations from 16 to 25 microns of the Trapezium and the Becklin-Neugebauer-Kleinmann-Low (BN-KL) object in Orion are reported. These observations were obtained with a liquid-helium-cooled grating spectrometer. The observations of the Trapezium show a relatively flat spectrum between 16 and 25 microns, which is consistent with a 20-micron emission peak similar to that previously found at 10 microns. The BN-KL source has a smooth spectrum over the same range, showing little absorption such as characterizes the 10-micron spectrum of this source. This lack of a deep 20-micron absorption is attributed to complex radiative-transfer processes within the molecular cloud.

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