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 30m 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.
@article{arxiv.1803.05442,
title = {Detection of HOCO+ in the protostar IRAS 16293-2422},
author = {Liton Majumdar and Pierre Gratier and Valentine Wakelam and Emmanuel Caux and Karen Willacy and Michael E. Ressler},
journal= {arXiv preprint arXiv:1803.05442},
year = {2018}
}
Comments
Accepted for publication in MNRAS on March 13th, 7 pages, 3 figures, 2 tables