SIMBAD references

2004A&A...428.1019M - Astronomy and Astrophysics, volume 428, 1019-1026 (2004/12-4)

Accurate rest frequencies of methanol maser and dark cloud lines.


Abstract (from CDS):

We report accurate laboratory measurements of selected methanol transition frequencies between 0.834 and 230GHz in order to facilitate astronomical velocity analyses. New data have been obtained between 10 and 27GHz and between 60 and 119GHz. Emphasis has been put on known or potential interstellar maser lines as well as on transitions suitable for the investigation of cold dark clouds. Because of the narrow line widths (<0.5km/s) of maser lines and lines detected in dark molecular clouds, accurate frequencies are needed for comparison of the velocities of different methanol lines with each other as well as with lines from other species. In particular, frequencies for a comprehensive set of transitions are given which, because of their low energy levels (<20cm–1 or 30K), are potentially detectable in cold clouds. Global Hamiltonian fits generally do not yet yield the required accuracy. Additionally, we report transition frequencies for other lines that may be used to test and to improve existing Hamiltonian models.

Abstract Copyright:

Journal keyword(s): masers - molecular data - ISM: molecules - radio lines: ISM - line: identification - line: profiles

VizieR on-line data: <Available at CDS (J/A+A/428/1019): table1.dat table2.dat refs.dat table3.dat tables.tex>

Simbad objects: 6

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