29 papers · 1 filter
A Sensitive Search For [NII] Emission in a z=6.4 Quasar Host Galaxy
F. Walter, A. Weiss, D. A. Riechers +4
We present a sensitive search for the ^3P_1->^3P_0 ground state fine structure line at 205 microns of ionized nitrogen ([NII]) in one of the highest redshift quasars (J1148+5251 at…
Distances to Galactic methanol masers
K. L. J. Rygl, A. Brunthaler, K. M. Menten +2
We present the first EVN parallax measurements of 6.7 GHz methanol masers in star forming regions of the Galaxy. The 6.7 GHz methanol maser transition is a very valuable astrometri…
An EVLA search for water megamaser emission in the submm galaxy SMM J16359+6612 at z=2.5
R. Edmonds, J. Wagg, E. Momjian +5
Using the Expanded Very Large Array, we have conducted a search for 22.2 GHz H2O megamaser emission in the strongly lensed submm galaxy, SMM J16359+6612 at z=2.517. This object is…
Trigonometric Parallaxes of Massive Star Forming Regions: V. G23.01-0.41 and G23.44-0.18
A. Brunthaler, M. J. Reid, K. M. Menten +3
We report trigonometric parallaxes for the massive star-forming regions G23.01-0.41 and G23.44-0.18, corresponding to distances of 4.59 [+0.38/-0.33] kpc and 5.88 [+1.37/-0.93] kpc…
Observations of the Goldreich-Kylafis effect in star-forming regions with XPOL at the IRAM 30m telescope
Jan Forbrich, Helmut Wiesemeyer, Clemens Thum +2
The Goldreich-Kylafis (GK) effect causes certain molecular line emission to be weakly linearly polarized, e.g., in the presence of a magnetic field. Compared to polarized dust emis…
Submillimeter water and ammonia absorption by the peculiar z~0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system
K. M. Menten, R. Guesten, S. Leurini +5
Using the Atacama Pathfinder Experiment (APEX) telescope we have detected the rotational ground-state transitions of ortho-ammonia and ortho-water toward the redshift ~0.89 absorbi…