Poster Open Access
Early Results from SOFIA/EXES High Resolution Spectroscopic Observations of Circumstellar Envelopes of AGB Stars
Edward J. Montiel;
J. P. Fonfría;
M. J. Richter;
C. N. DeWitt;
J. Cernicharo
We present early results from our project to investigate if there is a relationship between the mass-loss rates of AGB stars and the chemistry within the circumstellar envelopes that this process creates. We have obtained high spectral resolution (R > 60,000) observations with the Echelon Cross Echelle Spectrograph (EXES) aboard SOFIA of a small sample of C, M, and S-type AGB stars. The mass-loss rate of this sample ranges from 10-7 to 10-5 solar masses per year. We have focused on two spectral regions (7.5 & 13—14 μm) that allow us to study several molecules that are either exceedingly difficult to observe from the ground or have no permanent dipole moment.
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MontielE_Coolstars20p5.pdf
md5:07905293f634e982be0221bdebe8d3bb |
2.3 MB | Download |
Agúndez et al. 2020, A&A, 637, A59
Fonfría et al. 2019, A&A, 622, L14
Fonfría et al 2020, A&A, 643, L15
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| Data volume | 200.4 MB | 160.8 MB |
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- Publication date:
- February 26, 2021
- DOI:
-
- Keyword(s):
- AGB and post-AGB circumstellar matter line identification & surveys
- Meeting:
- The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, 2--4 March 2021
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International