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Organic chemistry in C-rich evolved stars

AuthorsFonfría, José Pablo ; Cernicharo, José ; Richter, M. J.; Montiel, E. J.; Santander-García, M.; Lacy, J. H.; Hinkle, K. H.; Agúndez, Marcelino ; Wallace, L
Issue Date4-Mar-2019
CitationEnergetic Processing of Large Molecules (2019)
AbstractThe search for simple organic molecules out of the Solar System has been hampered due to the lack of a permanent dipole moment displayed by many of them. These molecules do not show a pure rotational spectrum in the mm spectral range but their ro-vibrational spectra can be observed in the IR. Unfortunately, the atmosphere, which shows large amounts of H2O and CO2 in addition to traces of small organic species (e.g., C2 H2 , C2H4, and C2H6), blocks part of the extraterrestrial molecular radiation increasing the difficulty of the identification processes. Consequently, searching for new molecules in the IR commonly makes use of space observatories (ISO, Spitzer, JWST) despite their low availability. However, it is possible to use also ground-based facilities for this task along with high spectral resolution spectroscopy and taking advantage of a good telluric calibration, the transparent intervals existing between the telluric features, and the Doppler shift due to the Earth¿s orbital motion. In this poster, we will present a brief summary of the detection attempts of simple non-polar organic molecules performed in evolved stars during the last decades and our last results achieved with ground-based facilities (IRTF/TEXES and IRTF/iSHELL) and airborne observatories (SOFIA/EXES).
DescriptionEPoLM-4, Consejo Superior de Investigaciones Científicas (CSIC) in Madrid (Spain), March 4-6, 2019
Appears in Collections:(CFMAC-IFF) Comunicaciones congresos
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