Search Publications

High-resolution absorption spectroscopy of the circumgalactic medium of the Milky Way

Richter, P.; Fox, A. J.; Bomans, D. +3 more

In this article we discuss the importance of high-resolution absorption spectroscopy for our understanding of the distribution and physical nature of the gaseous circumgalactic medium (CGM) that surrounds the Milky Way. Observational and theoretical studies indicate a high complexity of the gas kinematics and an extreme multi-phase nature of the C…

Long-slit échelle spectroscopy of galactic outflows: The case of NGC 4449

Weis, K.; Bomans, D. J.

At high redshift the ubiquity of outflows and winds in strongly star-forming galaxies has been demonstrated using rest frame UV absorption lines. In the cases with optical emission lines, the studies mostly had to rely on low and intermediate dispersion spectra. This implies that for detailed studies of galactic wind physics we have to use local o…

Spectra of faint sources in crowded fields with FRODOSpec on the Liverpool Robotic Telescope

Goicoechea, L. J.; Shalyapin, V. N.

We check the performance of the FRODOSpec integral-field spectrograph for observations of faint sources in crowded fields. Although the standard processing pipeline L2 yields too noisy fibre spectra, we present a new processing software (L2LENS) that gives rise to accurate spectra for the two images of the gravitationally lensed quasar Q0957+561. …

Observational dynamics of low-mass stellar systems

Frank, M. J.

The last fifteen years have seen the discovery of new types of low-mass stellar systems that bridge the gap between the once well-separated regimes of galaxies and of star clusters. Whether such objects are considered galaxies depends also on the definition of the term ``galaxy'', and several possible criteria are based on their internal dynamics …