99 citations · 698 across the 15 of their papers we have counts for
15 papers
Astro2020 Science White Paper: The fundamentals of outflows from evolved stars
E. De Beck, M. L. Boyer, V. Bujarrabal +16
Models of the chemical evolution of the interstellar medium, galaxies, and the Universe rely on our understanding of the amounts and chemical composition of the material returned b…
Through the magnifying glass: ALMA acute viewing of the intricate nebular architecture of OH231.8+4.2
C. Sánchez Contreras, J. Alcolea, A. Castro-Carrizo +4
We present continuum and molecular line emission ALMA observations of OH 231.8+4.2, a well studied bipolar nebula around an asymptotic giant branch (AGB) star. The high angular res…
The maser emitting structure and time variability of the SiS lines J=14-13 and 15-14 in IRC+10216
J. P. Fonfría, M. Fernández-López, J. R. Pardo +8
We present new high angular resolution interferometer observations of the v=0 J=14-13 and 15-14 SiS lines towards IRC+10216, carried out with CARMA and ALMA. The maps, with angular…
Clues to NaCN formation
G. Quintana-Lacaci, J. Cernicharo, L. Velilla Prieto +5
ALMA is providing us essential information on where certain molecules form. Observing where these molecules emission arises from, the physical conditions of the gas, and how this r…
The Abundance of SiC2 in Carbon Star Envelopes: Evidence that SiC2 is a gas-phase precursor of SiC dust
S. Massalkhi, M. Agúndez, J. Cernicharo +6
Silicon carbide dust is ubiquitous in circumstellar envelopes around C-rich AGB stars. However, the main gas-phase precursors leading to the formation of SiC dust have not yet been…
IRC +10 216 in 3-D: morphology of a TP-AGB star envelope
M. Guélin, N. A. Patel, M. Bremer +10
During their late pulsating phase, AGB stars expel most of their mass in the form of massive dusty envelopes, an event that largely controls the composition of interstellar matter.…
The growth of carbon chains in IRC+10216 mapped with ALMA
M. Agundez, J. Cernicharo, G. Quintana-Lacaci +9
Linear carbon chains are common in various types of astronomical molecular sources. Possible formation mechanisms involve both bottom-up and top-down routes. We have carried out a…
The millimeter IRAM-30m line survey toward IK Tau
L. Velilla Prieto, C. Sánchez Contreras, J. Cernicharo +8
We carried out a millimeter wavelength line survey between 79 and 356 GHz with the IRAM-30m telescope to investigate the physical and chemical properties of the molecular envelope…
The abundance of 28Si32S, 29Si32S, 28Si34S, and 30Si32S in the inner layers of the envelope of IRC+10216
J. P. Fonfria, J. Cernicharo, M. J. Richter +3
We present high spectral resolution mid-IR observations of SiS towards the C-rich AGB star IRC+10216 carried out with the Texas Echelon-cross-Echelle Spectrograph mounted on the NA…
The peculiar distribution of CH3CN in IRC+10216 seen by ALMA
M. Agundez, J. Cernicharo, G. Quintana-Lacaci +4
IRC+10216 is a circumstellar envelope around a carbon-rich evolved star which contains a large variety of molecules. According to interferometric observations, molecules are distri…
Discovery of SiCSi in IRC+10216: A missing link between gas and dust carriers of SiC bonds
J. Cernicharo, M. C. McCarthy, C. A. Gottlieb +13
We report the discovery in space of a disilicon species, SiCSi, from observations between 80 and 350 GHz with the IRAM 30m radio telescope. Owing to the close coordination between…
Si-bearing molecules towards IRC+10216: ALMA unveils the molecular envelope of CWLeo
L. Velilla Prieto, J. Cernicharo, G. Quintana-Lacaci +9
We report the detection during the ALMA Cycle 0 of SiS rotational lines in high-vibrational states as well as SiO and SiC lines in their ground vibrational state, towards IRC+1…
Molecular ions in the O-rich evolved star OH231.8+4.2: HCO,HCO and first detection of SO, NH, and HO
C. Sánchez Contreras, L. Velilla Prieto, M. Agúndez +8
OH 231.8+4.2, a bipolar outflow around a Mira-type variable star, displays a unique molecular richness amongst circumstellar envelopes (CSEs) around O-rich AGB and post-AGB stars.…
New N-bearing species towards OH231.8+4.2: HNCO, HNCS, HCN and NO
L. Velilla Prieto, C. Sánchez Contreras, J. Cernicharo +7
OH231.8+4.2 is a well studied O-rich CSE around an intermediate-mass evolved star that displays bipolar molecular outflows accelerated up to 400 km/s. OH231 also presents an except…
Discovery of Time Variation of the Intensity of Molecular Lines in IRC+10216 in The Submillimeter and Far Infrared Domains
J. Cernicharo, D. Teyssier, G. Quintana-Lacaci +12
We report on the discovery of strong intensity variations in the high rotational lines of abundant molecular species towards the archetypical circumstellar envelope of IRC+10216. T…