Search Publications
High velocity outflows in narrow absorption line quasars
Chartas, G.; Giustini, M.; Charlton, J. +6 more
The current paradigm for the AGN phenomenon is a central engine that consists of an inflow of material accreting in the form of a disk onto a supermassive black hole. Observations in the UV and optical find high velocity ionized material outflowing from the black hole. We present results from Suzaku and XMM-Newton observations of a sample of intri…
Kinematics of the broad absorption line region in QSOs: Rotation and random motion
Popović, L. Č.; Antoniou, A.; Danezis, E. +2 more
Assuming that the Broad Absorption Line Region - BALR (originated in a disk wind) is composed of a number of successive independent absorbing density layers, which have apparent rotational and radial velocities and where ions have random velocities, we applied a model in order to obtain the kinematical parameters of BALR, by fitting the broad abso…
Astrometric measurement techniques
Reffert, Sabine
This contribution reviews the various principles which form the basis of astrometric measurements, such as meridian circle observations, imaging techniques, scanning satellites and interferometry. Various projects which employ those techniques are described, e.g. the Multichannel Astrometric Photometer, the Fine Guidance Sensors onboard the Hubble…
A new view on the ISM of galaxies: Far-infrared and submillimetre spectroscopy with Herschel
Wilson, Christine D.; Baes, Maarten; Madden, Suzanne C. +2 more
The FIR/submm window is amongst the least explored spectral regions of the electromagnetic spectrum. It is, however, a key to study the general properties of the interstellar medium of galaxies, as it contains important spectral line diagnostics from the neutral, ionized and molecular ISM. The Herschel Space Observatory, successfully launched on 1…