We describe the boxy bulge, long stellar bar and elliptical ring of the Galaxy. This model has largely evolved from NIR survey work by many teams and differs...
The breakdown of current gyrochronology as evidenced by old coeval stars
Gyrochronology can yield useful ages for field main-sequence stars, a regime where other techniques are problematic. Typically, gyrochronology relations are...
The evolution of the morphology of C/1999 S4 (LINEAR) is examined from a series of images taken from shortly before the disruption of the nucleus until 10 days...
The Bright Galaxy Population of Five Medium Redshift Clusters. Quantitative Morphology.
Following the study already presented in our previous work, based on the Nordic Optical Telescope (NOT) sample, which consists on five clusters of galaxies...
The bright X ray transient GS2023+338 (=V404 Cyg) in optical outburst and decline
The results of optical spectroscopy and photometry from La Palma (Canary Islands) of V404 Cyg are presented. They correspond to the optical counterpart of the...
The brown dwarf candidate [KG2001] 102 in the Cha I cloud: Is it a multiple system?
We present deep IJHK_s and H_2 images of a region in the Chamaeleon I dark cloud containing the very low-mass young object [KG2001]102, in an attempt to search...
The Buildup of E-S0 Galaxies at z < 2 from Pure Luminosity Evolution Models
Considering that the recent history of E-S0 galaxies can be approximated by Pure Luminosity Evolution (PLE), we have examined a set of PLE models in order to...
The Burst Behaviour and Evolutionary History of 4u 1820-30
We want to test the observed type I X-ray burst behaviour of the bright ultra-compact binary system 4U 1820-30 with evolutionary and burst models. The short...