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Circumstellar chemistry of Si-C bearing molecules in the C-rich AGB star IRC+10216

Published online by Cambridge University Press:  30 December 2019

L. Velilla-Prieto Open the ORCID record for L. Velilla-Prieto [Opens in a new window] ,
J. Cernicharo ,
M. Agúndez ,
J. P. Fonfría ,
A. Castro-Carrizo Open the ORCID record for A. Castro-Carrizo [Opens in a new window] ,
G. Quintana-Lacaci ,
N. Marcelino ,
M. C. McCarthy ,
C. A. Gottlieb  and
C. Sánchez Contreras
...Show all authors
L. Velilla-Prieto
Affiliation:
Instituto de Física Fundamental (IFF-CSIC), Serrano, 123, CP 28006, Madrid, Spain Dept. of Space, Earth and Environment, Chalmers Univ. of Technology, Onsala Space Observatory, 43992 Onsala, Sweden email: [email protected]
J. Cernicharo
Affiliation:
Instituto de Física Fundamental (IFF-CSIC), Serrano, 123, CP 28006, Madrid, Spain
M. Agúndez
Affiliation:
Instituto de Física Fundamental (IFF-CSIC), Serrano, 123, CP 28006, Madrid, Spain
J. P. Fonfría
Affiliation:
Instituto de Física Fundamental (IFF-CSIC), Serrano, 123, CP 28006, Madrid, Spain
A. Castro-Carrizo
Affiliation:
Institut de Radioastronomie Millimétrique (IRAM), 38406 Saint-Martin-d’Hères, France
G. Quintana-Lacaci
Affiliation:
Instituto de Física Fundamental (IFF-CSIC), Serrano, 123, CP 28006, Madrid, Spain
N. Marcelino
Affiliation:
Instituto de Física Fundamental (IFF-CSIC), Serrano, 123, CP 28006, Madrid, Spain
M. C. McCarthy
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
C. A. Gottlieb
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
C. Sánchez Contreras
Affiliation:
Centro de Astrobiologia, (CSIC-INTA), 28691 Villanueva de la Cañada, Spain
K. H. Young
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
N. A. Patel
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
C. Joblin
Affiliation:
IRAP - Université de Toulouse, CNRS, UPS, CNES, BP 44346, 31028 Toulouse Cedex 4, France
J. A. Martín-Gago
Affiliation:
Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC),Cantoblanco, 28049 Madrid, Spain
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Abstract

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Silicon carbide together with amorphous carbon are the main components of dust grains in the atmospheres of C-rich AGB stars. Small gaseous Si-C bearing molecules (such as SiC, SiCSi, and SiC2) are efficiently formed close to the stellar photosphere. They likely condense onto dust seeds owing to their highly refractory nature at the lower temperatures (i.e., below about 2500 K) in the dust growth zone which extends a few stellar radii from the photosphere. Beyond this region, the abundances of Si-C bearing molecules are expected to decrease until they are eventually reformed in the outer shells of the circumstellar envelope, owing to the interaction between the gas and the interstellar UV radiation field. Our goal is to understand the time-dependent chemical evolution of Si-C bond carriers probed by molecular spectral line emission in the circumstellar envelope of IRC+10216 at millimeter wavelengths.

Keywords

stars: AGB & post-AGB(stars:) circumstellar matterstars: individual (IRC+10216)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 535 - 537
Copyright
© International Astronomical Union 2019 

References

Agúndez, M., Fonfra, J. P., Cernicharo, J., et al. 2012, A&A, 543, A48 Google Scholar
Cernicharo, J. 2012, EAS Publications Series, 58, 251 CrossRefGoogle Scholar
Cernicharo, J., Daniel, F., Castro-Carrizo, A., et al. 2013, ApJ (Letter), 778, L25 CrossRefGoogle Scholar
Cernicharo, J., McCarthy, M. C., Gottlieb, C. A., et al. 2015, ApJ (Letter), 806, L3 CrossRefGoogle Scholar
Guélin, M., Patel, N. A., Bremer, M., et al. 2018, A&A, 610, A4 Google ScholarPubMed
Savage, B. D., & Mathis, J. S. 1979, ARAA, 17, 73 CrossRefGoogle Scholar
Treffers, R., & Cohen, M. 1974, ApJ, 188, 545 CrossRefGoogle Scholar
Velilla Prieto, L., Sánchez Contreras, C., Cernicharo, J., et al. 2015, A&A, 575, A84 Google Scholar