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Title:
Spatially resolved spectra of silicate dust around Alpha Orionis
Authors:
Sloan, G. C.; Grasdalen, G. L.; Levan, Paul D.
Affiliation:
AA(Wyoming Univ., Laramie), AB(G-star Enterprises, Denver, CO), AC(USAF, Phillips Lab., Hanscom AFB, MA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 1, p. 328-332. (ApJ Homepage)
Publication Date:
02/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL SPECTROSCOPY, COSMIC DUST, SILICON, STELLAR ENVELOPES, EMISSION SPECTRA, POINT SPREAD FUNCTIONS, STELLAR EVOLUTION
DOI:
10.1086/172282
Bibliographic Code:
1993ApJ...404..328S

Abstract

We have observed Alpha Orionis with a 10 micron long-slit spectrometer. By applying maximum entropy reconstruction techniques, we have spatially resolved the silicate emission from the circumstellar shell. The emissivity derived from our silicate spectrum compares favorably with published emissivity profiles describing circumstellar silicates. The lack of silicate emission in the direction of the central star suggests that the circumstellar dust may not be distributed in a spherical shell.

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