3 papers
astro-ph2000
28SiO, 29SiO and 30SiO excitation: effects of infrared line overlaps
F. Herpin, A. Baudry
We have investigated the influence of several line overlaps between 28SiO, 29SiO and 30SiO on maser emission from the envelopes of late-type stars using the Large Velocity Gradient…
astro-ph2000
VLBI Astrometry of the Stellar Image of U Herculis, Amplified by the 1667 OH Maser
H. J. van Langevelde, W. Vlemmings, P. J. Diamond +2
The OH 1667 MHz maser in the circumstellar shell around the Mira variable U Herculis has been observed with the NRAO Very Long Baseline Array (VLBA) at 6 epochs, spread over 4 year…
astro-ph1998
29SiO (v=0) and 28SiO (v=1) J=2-1 maser emission from Orion IRc2
A. Baudry, F. Herpin, R. Lucas
We have observed with the IRAM interferometer at two different epochs and simultaneously the two transitions v=0, J=2-1 and v=1, J=2-1 of 29SiO and 28SiO in Orion IRc2. We have mad…