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Far-Infrared detection of methylene
E. T. Polehampton, K. M. Menten, S. Bruenken +2
We present a clear detection of CH2 in absorption towards the molecular cloud complexes Sagittarius B2 and W49 N using the ISO Long Wavelength Spectrometer. These observations repr…
Resolved Molecular Gas in a Quasar Host Galaxy at Redshift z=6.42
F. Walter, C. Carilli, F. Bertoldi +5
We present high-resolution VLA observations of the molecular gas in the host galaxy of the highest redshift quasar currently known, SDSS J1148+5251 (z=6.42). Our VLA data of the CO…
Distance of W3(OH) by VLBI annual parallax measurement
K. Hachisuka, A. Brunthaler, Y. Hagiwara +4
The most powerful tool for measuring distances within our Galaxy is the annual parallax. We carried out phase-referencing VLBI observations of HO masers in the star forming r…
Probing the obscuring medium around active nuclei using masers: The case of 3C403
A. Tarchi, C. Henkel, M. Chiaberge +3
We report the first detection of a water megamaser in a radio-loud galaxy, 3C403, and present a follow-up study using the VLA. 3C403 has been observed as a part of a small sample o…
Accurate rest frequencies of methanol maser and dark cloud lines
H. S. P. Mueller, K. M. Menten, H. Maeder
We report accurate laboratory measurements of selected methanol transition frequencies between 0.834 and 230 GHz in order to facilitate astronomical velocity analyses. New data hav…
The IC133 Water Vapor Maser in the Galaxy M33: A Geometric Distance
A. L. Argon, L. J. Greenhill, J. M. Moran +3
We report on the results of a 14 year long VLBI study of proper motions in the IC133 H2O maser source in the galaxy M33. The method of Ordered Motion Parallax was used to model the…