For the past 6 years the authors have been measuring the radial velocity of the M-giant component of symbiotic stars with high dispersion echelle spectrographs...
Orbitally-modulated emission line profiles from non-Keplerian accretion disks.
Under the assumption of a vanishingly small pressure and a small viscosity accretion disk in a close binary system, gas streamlines are calculated via an...
Orbitally-modulated optical and UV emissions from SS Cygni in quiescence.
The authors present the orbitally-modulated UV and optical emissions from SS Cygni in quiescence, essentially based on their multifrequency observations with a...
Orbits of Isolated Dwarfs: Local Group Mass and Environmental Quenching
Dwarf galaxies are excellent test particles for studying dynamical properties of the Local Group (LG) and the role of environment in quenching of star formation...
Organizational transformation into the operational phase of the GTC
In this paper we review various organizational issues encountered when GRANTECAN, the Spanish organization responsible for the construction and operation of the...
Orientatio ad Sidera (OAS): a comprehensive project for cultural astronomy research in ancient Mediterranean cultures
During the last decade (starting in 2005), the OAS Project has been run, with the support of the Spanish research agencies. Within its framework, research on...