SIMBAD references

2016A&A...591L...2V - Astronomy and Astrophysics, volume 591, L2-2 (2016/7-1)

Abundance of HOCO+ and CO2 in the outer layers of the L1544 prestellar core.


Abstract (from CDS):

The L1544 prestellar core has been observed as part of the ASAI IRAM Large Program at 3 mm. These observations led to the detection of many complex molecules. In this Letter, we report the detection of two lines, at 85.5GHz (40,4-30,3) and 106.9GHz (50,5-40,4), respectively, of the protonated carbon dioxide ion, HOCO+. We also report the tentative detection of the line at 100.4GHz (50,5-40,4) of DOCO+. The non-LTE analysis of the detected lines shows that the HOCO+ emission originates in the external layer where non-thermal desorption of other species has previously been observed. Its abundance is (5±2)x10–11. Modelling of the chemistry involved in the formation and destruction of HOCO+ provides a gaseous CO2 abundance of 2x10–7 (with respect to H2) with an upper limit of 2x10–6.

Abstract Copyright: © ESO, 2016

Journal keyword(s): astrochemistry - line: identification - molecular data - radiative transfer

Simbad objects: 8

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