SIMBAD references

2008A&A...486..493L - Astronomy and Astrophysics, volume 486, 493-496 (2008/8-1)

Limits on chemical complexity in diffuse clouds: search for CH3 and HC5N absorption.

LISZT H.S., PETY J. and LUCAS R.

Abstract (from CDS):

An unexpectedly complex polyatomic chemistry exists in diffuse clouds, allowing detection of species such as C2H, C3H2, H2CO, and NH3, which have relative abundances that are strikingly similar to those inferred toward the dark cloud TMC-1. We probe the limits of complexity of diffuse cloud polyatomic chemistry. We used the IRAM Plateau de Bure Interferometer to search for galactic absorption from low-lying J=2-1 rotational transitions of A- and E-CH3OH near 96.740GHz and used the VLA to search for the J=8-7 transition of HC5N at 21.3GHz. Neither CH3OH nor HC5N were detected at column densities well below those of all polyatomics known in diffuse clouds and somewhat below the levels expected from comparison with TMC-1. The HCN/HC5N ratio is at least 3-10 times higher in diffuse gas than toward TMC-1.

Abstract Copyright:

Journal keyword(s): ISM: molecules - astrochemistry - ISM: clouds

Errata: erratum vol. 594, art. C1 (2016)

CDS comments: Paragraph 4.1 B0415+479 is a misprint for B0415+379.

Simbad objects: 7

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2019.10.22-12:11:46

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