Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-03-17
Astrophys.J. 616 (2004) L51-L54
Astronomy and Astrophysics
Astrophysics
accepted for publication in ApJ Letters, 12 pages, 3 figures
Scientific paper
10.1086/420883
We present imaging observations of the evolved star IRC+10216 in the CS J=14--13 line at 685.4 GHz and associated submillimeter continuum at about 2'' resolution made with the partially constructed Submillimeter Array. The CS J=14--13 line emission from the stellar envelope is well resolved both spatially and spectrally. The strong central concentration of the line emission provides direct evidence that CS is a parent molecule that forms close to the stellar photosphere, in accord with previous images of the lower excitation CS J=2--1 line and inferences from unresolved observations of vibrationally excited transitions. The continuum emission is dominated by a compact, unresolved component, consistent with the photospheric emission, that accounts for about 20% of the broadband 450 micron flux. These are the first interferometer imaging observations made in the semi-transparent 450 micron atmospheric window.
Gurwell Mark A.
Hunter Todd Russell
Wilner David J.
Young Kenneth H.
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