Detection of HOCO+ in the protostar IRAS 16293−2422. Issue 1 (15th March 2018)

• Record Type: Journal Article
• Authors: Majumdar, L; Gratier, P; Wakelam, V; Caux, E; Willacy, K; Ressler, M E
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 477:Issue 1(2018)
• Page Start: 525
• Page End: 530
• Publication Date: 2018-03-15
• Subjects: astrochemistry -- methods: statistical -- ISM: abundances -- ISM: evolution -- ISM: molecules; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty703
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: 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 (40, 4 –30, 3 and 50, 5 –40, 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.