Search Publications

Properties of nuclear star clusters

Böker, Torsten

Over the last decade, HST imaging studies have revealed that the centers of most galaxies are occupied by massive, yet compact, stellar clusters. These 'nuclear star clusters' (NSCs) are found in a wide range of Hubble types, suggesting that their formation is intricately linked to galaxy evolution. In this review, I briefly summarize what has bee…

On the classification of ultra-compact nuclear rings

Beckman, John E.; Comerón, Sébastien; Knapen, Johan H.

Ultra-compact nuclear rings (UCNRs) can be defined as those galactic circumnuclear rings with a radius inferior to 200 parsecs [1]. Because very high spatial resolution is needed, this population has not been studied systematically until now. One important issue that has to be solved is whether UCNRs have an origin similar to larger circumnuclear …

Two-dimensional structure and kinematics of a representative sample of low-z ULIRGs

Colina, L.; Arribas, S.; García-Marín, M.

We present the optical INTEGRAL integral field spectroscopy data and Hubble Space Telescope archive images obtained for a representative sample of 22 local Ultraluminous Infrared Galaxies (ULIRGs L_IR >10¹²L_odot). The sample has been designed for fulfilling a program aimed at studying the internal structure and k…