Far-infrared detection of 17OH towards Sagittarius B2
Abstract
The frequencies and line strengths of the 2Pi3/2 J=5/2-3/2 rotational transition of 17OH have been calculated from an analysis of its far-infrared laser magnetic resonance spectrum. These results have been used to make the first detection of a pure rotational transition of 17OH in the ISM. Two resolved components of this transition appear in absorption towards the giant molecular cloud Sagittarius B2, which was observed at a spectral resolution of 33 km/s with the Fabry-Perot mode of the ISO Long Wavelength Spectrometer. The corresponding transition of 18OH was also observed and its line shape was modelled using HI measurements. The 18O/17O ratio of 3.5 was then used to compare this with the observed 17OH line shape.
Cite
@article{arxiv.astro-ph/0308205,
title = {Far-infrared detection of 17OH towards Sagittarius B2},
author = {E. T. Polehampton and J. M. Brown and B. M. Swinyard and J. -P. Baluteau},
journal= {arXiv preprint arXiv:astro-ph/0308205},
year = {2009}
}
Comments
4 pages, 3 figure, for associated ascii table see ftp://cdsarc.u-strasbg.fr/cats/J/A+A/406/L47/