An Interferometric Spectral-line Survey of IRC+10216 in the 345 GHz Band

Abstract

We report a spectral-line survey of the extreme carbon star IRC+10216 carried out between 293.9 and 354.8 GHz with the Submillimeter Array. A total of 442 lines were detected, more than 200 for the first time; 149 are unassigned. Maps at an angular resolution of ~3" were obtained for each line. A substantial new population of narrow lines with an expansion velocity of ~4 km/s (i.e. ~ 30% of the terminal velocity) was detected. Most of these are attributed to rotational transitions within vibrationally excited states, emitted from energy levels above the v=0, J=0 ground state with excitation energy of 1000-3000 K. Emission from these lines appears to be centered on the star with an angular extent of <1". We use multiple transitions detected in several molecules to derive physical conditions in this inner envelope of IRC+10216.

90 pages, 13 figures. Accepted for publication in ApJSS

References in corpus (5)

• Warm water vapour in the sooty outflow from a luminous carbon star
• 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
• The distribution of SiO in the circumstellar envelope around IRC+10216
• Radio continuum monitoring of the extreme carbon star IRC+10216

Cited by in corpus (43)

• Molecules at z=0.89: A 4-mm-rest-frame absorption line survey toward PKS 1830-211
• Molecular abundances in the inner layers of IRC +10216
• Discovery of SiCSi in IRC+10216: A missing link between gas and dust carriers of SiC bonds
• ALMA data suggest the presence of a spiral structure in the inner wind of CW Leo
• PO and PN in the wind of the oxygen-rich AGB star IK Tau
• The growth of carbon chains in IRC+10216 mapped with ALMA
• Unveiling the dust nucleation zone of IRC+10216 with ALMA
• The size, luminosity and motion of the extreme carbon star IRC+10216 (CW Leonis)
• An Interferometric Spectral-Line and Imaging Survey of VY Canis Majoris in the 345 GHz Band
• The Impact of Recent Advances in Laboratory Astrophysics on our Understanding of the Cosmos
• The Abundance of SiC2 in Carbon Star Envelopes: Evidence that SiC2 is a gas-phase precursor of SiC dust
• A Search for Hydroxylamine (NH2OH) toward Select Astronomical Sources
• First light demonstration of the integrated superconducting spectrometer
• A 1.3 cm line survey toward IRC +10216
• Laboratory and astronomical discovery of magnesium dicarbide, MgC${}_2$
• Sulphur-bearing molecules in AGB stars I: The occurrence of hydrogen sulfide
• Circumstellar environment of the M-type AGB star R Dor. APEX spectral scan at $159.0-368.5$ GHz
• The abundance of C2H4 in the circumstellar envelope of IRC+10216
• The peculiar distribution of CH3CN in IRC+10216 seen by ALMA
• Templates of binary-induced spiral-shell patterns around mass-losing post-main sequence stars
• The abundance of 28Si32S, 29Si32S, 28Si34S, and 30Si32S in the inner layers of the envelope of IRC+10216
• Mapping the Linearly Polarized Spectral Line Emission around the Evolved Star IRC+10216
• ATOMIUM: Molecular inventory of 17 oxygen-rich evolved stars observed with ALMA
• Radio Stars: from kHz to THz
• A spectral line survey of IRC +10216 between 13.3 and 18.5 GHz
• A Molecular Line Survey of the Carbon-Rich Proto-Planetary Nebula AFGL 2688 in the 3mm and 1.3mm Windows
• Widespread HCN maser emission in carbon-rich evolved stars
• Discovery of a Shell of Neutral Atomic Hydrogen Surrounding the Carbon Star IRC+10216
• Molecular line study of the S-type AGB star W Aquilae. ALMA observations of CS, SiS, SiO and HCN
• Monitor variability of millimeter lines in IRC +10216
• A Pilot Imaging Line Survey of RW LMi and IK Tau Using the Expanded Very large Array
• Ultra-pure digital sideband separation at sub-millimeter wavelengths
• Molecules in the carbon-rich protoplanetary nebula CRL 2688
• Vibrationally Excited C${}_4$H
• Multi-frequency high spectral resolution observations of HCN toward the circumstellar envelope of Y CVn
• Charting Circumstellar Chemistry of Carbon-rich AGB Stars: I. ALMA 3 mm spectral surveys
• Radio Stars and Their Lives in the Galaxy
• ALMA monitoring of mm line variation in IRC+10216: I. Overview of millimeter variability
• Herschel/HIFI search for H2-17O and H2-18O in IRC+10216: constraints on models for the origin of water vapor
• The spectra of evolved stars at 20--25\,GHz: tracing circumstellar chemistry during the asymptotic giant branch to planetary nebula transition
• [C I] and [C II] emission in the circumstellar envelope of IRC +10216 I. Observational data and NLTE modeling of the [C I] emission
• Charting circumstellar chemistry of carbon-rich asymptotic giant branch stars. II. Abundances and spatial distributions of CS
• IRC+10216 mass loss properties through the study of $\lambda$3mm emission: Large spatial scale distribution of SiO, SiS, and CS