Rayleigh guide star AO demonstrator for the 4.2m William Herschel Telescope
An experimental Adaptive Optics system utilizing a low-altitude Rayleigh Laser Guide Star is presented. The current status of the project is described together...
Rayleigh scattering profiles with altitude at Teide Observatory produced by laser
Rayleigh scattering produced in the lower atmosphere by laser launched from the ground, could be very relevant for performances of Laser Guide Stars systems and...
Rayleigh-Taylor instability in partially ionized prominence plasma
We study Rayleigh-Taylor instability (RTI) at the coronal-prominence boundary by means of 2.5D numerical simulations in a single-fluid MHD approach including a...
Rb and Zr abundances in massive Galactic AGB stars revisited
We report new abundances of Rb and Zr in a sample of massive Galactic asymptotic giant branch (AGB) stars that were previously studied with hydrostatic models...
We continued our Swift-XRT monitoring of the new very-faint X-ray source XMMSL1 J171900.4-353217 [ATel #2607, #2656]. Two new observations were obtained on Jun...
Re-Classification of the Alleged Quasar Q0045-3337
We present a medium-resolution optical spectrum of the alleged high-redshift quasar Q0045-3337, taken at the ESO/3.6m telescope. Our observations show that the...