The Ney-Allen Nebula: an Unambiguous Example of Infrared Circumstellar Dust Emission

Details The Ney-Allen Nebula: an Unambiguous Example of Infrared Circumstellar Dust Emission The Ney-Allen Nebula: an Unambiguous Example of Infrared Circumstellar Dust Emission

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ap%26ss.224..461g&link_type=abstract

Astrophysics and Space Science, Volume 224, Issue 1-2, pp. 461-461

Astronomy and Astrophysics

Astrophysics

Orion, Circumstellar Dust

Scientific paper

Diffraction-limited array images of the Trapezium/Ney Allen infrared nebula have been obtained at six wavelengths between 7.8 and 12.4 microns, including the 9.7 micron silicate feature. Extended emission from warm dust shows significant differences in structure around each of the four Trapezium stars. The most dramatic infrared source is associated withθ 1 Orionis D, where the bright mid-infrared emission is found to be a distinct crescent-shaped ridge or shell, concentric with the O star. This unambiguous relationship between a known type stellar luminosity source and a distinct circumstellar dust cloud of known distance and dimensions provides a unique opportunity to test the predictions of dust grain emission models for circumstellar infrared sources.

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