Physical and Chemical Conditions in the Dust Formation Zone of IRC+10216
Abstract
A mid-infrared high-resolution spectral survey of the source IRC+10216 (CW Leo) has been carried out between 11 and 14 μm. A large number of lines of C_2H_2 and HCN and their most abundant isotopologues, have been identified. Lines involving high-energy ro-vibrational levels allow an accurate derivation of the physical and chemical conditions in the innermost envelope. We have developed a radiative transfer model capable of fitting the observed lines satisfactorily. The fit of more than 200 ro-vibrational lines allowed us to get the kinetic, vibrational and rotational temperatures and the abundances of the C_2H_2 and HCN between 1 and 300 R_*.
- Publication:
-
Astrochemistry: Recent Successes and Current Challenges
- Pub Date:
- 2005
- DOI:
- 10.1017/S1743921306007538
- Bibcode:
- 2005IAUS..231..509E