Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 477, Issue 1, Pages 525-530Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty703
Keywords
astrochemistry; methods: statistical; ISM: abundances; ISM: evolution; ISM: molecules
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Funding
- INSU/CNRS (France)
- MPG (Germany)
- IGN (Spain)
- ERC starting grant (3DICE) [336474]
- NASA postdoctoral program
- Conseil National de la Recherche Scientifique (CNRS)
- Centre National dEtudes Spatiales (CNES)
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The protonated form of CO2, HOCO+, is assumed to be an indirect tracer of CO2 in the millimeter/submillimeter regime since CO2 lacks a permanent dipole moment. Here, we report the detection of two rotational emission lines (4(0,4)-3(0,3) and 5(0,5)-4(0.4)) of HOCO+ in IRAS 16293-2422. For our observations, we have used EMIR heterodyne 3 mm receiver of the IRAM 30 m telescope. The observed abundance of HOCO+ is compared with the simulations using the 3-phase NAUTILUS chemical model. Implications of the measured abundances of HOCO+ to study the chemistry of CO2 ices using JWST-MIRI and NIRSpec are discussed as well.
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