683 citations · 10.5k across the 221 of their papers we have counts for
8 papers · 1 filter
A Simple Disk Wind Model for Broad Absorption Line Quasars
N. Higginbottom, C. Knigge, K. S. Long +2
Approximately 20% of quasi-stellar objects (QSOs) exhibit broad, blue-shifted absorption lines in their ultraviolet spectra. Such features provide clear evidence for significant ou…
Modelling the spectra of (BAL)QSOs
Nick Higginbottom, Knox S. Long, Christian Knigge +1
We have embarked upon a project to model the UV spectra of BALQSOs using a Monte Carlo radiative transfer code previously validated through modelling of the winds of cataclysmic va…
A Young Massive Stellar Population Around the Intermediate Mass Black Hole ESO 243-49 HLX-1
S. Farrell, M. Servillat, J. Pforr +9
We present Hubble Space Telescope and simultaneous Swift X-ray telescope observations of the strongest candidate intermediate mass black hole ESO 243-49 HLX-1. Fitting the spectral…
The Entrainment-Limited Evolution of FR II Sources: Maximum Sizes and A Possible Connection to FR Is
Yang Wang, C. Knigge, J. H. Croston +1
We construct a simple theoretical model to investigate how entrainment gradually erodes high-speed FR II jets. This process is described by embedding a mixing-layer model developed…
Searching for the signature of radiative line driving: On the absence of Ly-alpha-N V line-locking features in a large sample of BALQSOs
Chris Cottis, Mike Goad, Christian Knigge +1
We have searched the hybrid BALQSO catalogue of Scaringi et al. derived from DR5 of the SDSS in order to compile the largest sample of objects displaying spectral signatures which…
The M31 globular cluster system: ugriz and K-band photometry and structural parameters
Mark B. Peacock, Thomas J. Maccarone, Christian Knigge +4
We present an updated catalogue of M31 globular clusters (GCs) based on images from the Wide Field CAMera (WFCAM) on the UK Infrared Telescope and from the Sloan Digital Sky Survey…