SIMBAD references

2004A&A...428..117L - Astronomy and Astrophysics, volume 428, 117-120 (2004/12-2)

The abundance of HOC+ in diffuse clouds.


Abstract (from CDS):

We used the Plateau de Bure Interferometer to search for λ3mm absorption lines of HOC+ from local diffuse and translucent clouds occulting compact extragalactic mm-wave continuum sources. We detected HOC+ in three directions with column densities only 70-120 times below that of the HCO+ isomer, a factor 5-50 higher than typically found in dense dark gas but comparable to recent observations of dense photon-dominated regions. The observed amounts of HOC+N(HOC+)/N(H2)=3-6x10–11 can be made in quiescent diffuse gas at thermal gas-kinetic rates if the H2O/OH ratio is of order unity, in mild violation of extant observational limits.

Abstract Copyright:

Journal keyword(s): ISM: molecules - astrochemistry

Simbad objects: 7

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