Spectroscopic parameters for silacyclopropynylidene, SiC${}_2$, from extensive astronomical observations toward CW Leo (IRC +10216) with the Herschel satellite

Abstract

A molecular line survey has been carried out toward the carbon-rich asymptotic giant branch star CW Leo employing the HIFI instrument on board of the Herschel satellite. Numerous features from 480 GHz to beyond 1100 GHz could be assigned unambiguously to the fairly floppy SiC${}_2$ molecule. However, predictions from laboratory data exhibited large deviations from the observed frequencies even after some lower frequency data from this survey were incorporated into a fit. Therefore, we present a combined fit of all available laboratory data together with data from radio-astronomical observations.

7 pages, 1 figure, J. Mol. Spectrosc., appeared; CDMS links corrected (version 2; current version: 3; may be updated later this year)

References in corpus (5)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• Astronomical identification of CN-, the smallest observed molecular anion
• Detection of C5N- and vibrationally excited C6H in IRC +10216
• A high resolution line survey of IRC+10216 with Herschel. First results: Detection of warm silicon dicarbide SiC2
• A spectral line survey in the 2 mm and 1.3 mm windows toward the carbon rich envelope of IRC +10216

Cited by in corpus (10)

• The Cologne Database for Molecular Spectroscopy, CDMS, in the Virtual Atomic and Molecular Data Centre, VAMDC
• Confirmation of circumstellar phosphine
• Discovery of SiCSi in IRC+10216: A missing link between gas and dust carriers of SiC bonds
• Discovery of Time Variation of the Intensity of Molecular Lines in IRC+10216 in The Submillimeter and Far Infrared Domains
• The Abundance of SiC2 in Carbon Star Envelopes: Evidence that SiC2 is a gas-phase precursor of SiC dust
• The complex dust formation zone of the AGB star IRC+10216 probed with CARMA 0.25 arcsec angular resolution molecular observations
• Electronic transitions of jet-cooled SiC2, Si2Cn (n=1-3), Si3Cn (n=1,2), and SiC6H4 between 250 and 710 nm
• ATOMIUM: Molecular inventory of 17 oxygen-rich evolved stars observed with ALMA
• Reconciling spectroscopy with dynamics in global potential energy surfaces: the case of the astrophysically relevant SiC${}_2$
• The Abundance of SiC${}_2$ in Carbon Star Envelopes