UDP: an integral management system of embedded scripts implemented into the IMaX instrument of the Sunrise mission
The UDP (User Defined Program) system is a scripting framework for controlling and extending instrumentation software. It has been specially designed for air-...
ULIRGs: Tidal-induced Star Formation and Implications for SCUBA Sources
Integral field optical spectroscopy with the INTEGRAL fiber-fed system is used to investigate the properties of the tidal-induced star formation in the...
Ultra low-mass star and substellar formation in σ Orionis
The nearby young σ Orionis cluster (˜360 pc, ˜3 Myr) is becoming one of the most important regions for the study of ultra low-mass star formation and its...
Ultra-deep imaging of nearby galaxy outskirts from the ground
We show how present-day 10 meter class telescopes can provide broadband imaging 1.5-2 mag deeper than most previous results within a reasonable amount of time (...
Deep imaging is a fundamental tool in the study of the outermost structures of galaxies. We review recent developments in ultra-deep imaging of galaxy disks and...
Ultra-diffuse galaxies are smaller than Milky Way-like galaxies and more like dwarfs
The effective or half-light radius has become a very popular choice for characterising galaxy size, but it measures the concentration of light within galaxies...
A large number of Ultra-Diffuse Galaxies (UDGs) has been detected over the past few years, both in clusters and in isolation. UDGs have stellar masses typical...