Submillimeter Array Observations of CS J=14--13 Emission from the Evolved Star IRC+10216

Abstract

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.

accepted for publication in ApJ Letters, 12 pages, 3 figures

References in corpus (2)

• The Submillimeter Array
• Towards the automated reduction and calibration of SCUBA data from the James Clerk Maxwell Telescope

Cited by in corpus (10)

• The Submillimeter Array
• ALMA data suggest the presence of a spiral structure in the inner wind of CW Leo
• An Interferometric Spectral-line Survey of IRC+10216 in the 345 GHz Band
• The distribution of SiO in the circumstellar envelope around IRC+10216
• Submillimeter narrow emission lines from the inner envelope of IRC+10216
• The complex dust formation zone of the AGB star IRC+10216 probed with CARMA 0.25 arcsec angular resolution molecular observations
• Radio continuum monitoring of the extreme carbon star IRC+10216
• IRC+10216's Innermost Envelope -- The eSMA's View
• The distribution of H13CN in the circumstellar envelope around IRC+10216
• Dual frequency 230/690 GHz interferometry at the Submillimeter Array