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II. Accurate Positions and Proper Motions of Stellar SiO Masers near the Galactic Center
M. J. Reid, K. M. Menten, R. Genzel +3
Menten, Reid, Eckart and Genzel (1997) accurately determined the position of Sgr A* on an infrared image, by aligning the infrared image with positions measured for SiO masers, ass…
Detection of HCN Direct l-Type Transitions Probing Hot Molecular Gas in the Proto-Planetary Nebula CRL 618
S. Thorwirth, F. Wyrowski, P. Schilke +4
We report the detection of direct l-type transitions towards the proto-planetary nebula CRL 618 during a study of vibrationally excited carbon chains. The J=8,10,11,12,13,14 DJ=0 t…
Physical conditions in the Protoplanetary Nebula CRL 618 derived from observations of vibrationally excited HCCCN
F. Wyrowski, P. Schilke, S. Thorwirth +2
We used the Effelsberg 100m and IRAM 30m telescopes to observe vibrationally excited cyanoacetylene (HCCCN) in several rotational transitions toward the proto-planetary nebula CRL6…
Closest Star Seen Orbiting the Supermassive Black Hole at the Centre of the Milky Way
R. Schodel, T. Ott, R. Genzel +20
Measurements of stellar velocities and variable X-ray emission near the centre of the Milky Way have provided the strongest evidence so far that the dark mass concentrations seen i…
86 GHz SiO maser survey of late-type stars in the Inner Galaxy. I. Observational data
M. Messineo, H. J. Habing, L. O. Sjouwerman +2
We present 86 GHz (v = 1, J = 2 -1) SiO maser line observations with the IRAM 30-m telescope of a sample of 441 late-type stars in the Inner Galaxy (-4 degr < l < +30 degr). These…
Observations of extragalactic masers in bright IRAS sources
A. Tarchi, C. Henkel, A. B. Peck +2
We report the first results of an ongoing survey at 22 GHz with the 100-m Effelsberg telescope to search for water maser emission in bright IRAS sources. We have detected water vap…