18 citations · 88 across the 11 of their papers we have counts for
6 papers · 1 filter
Probing ultra-diffuse galaxies out to the virial radius of the Coma cluster with XMM-Newton
M. S. Mirakhor, S. A. Walker
We probe the formation scenarios and the active galactic nuclei (AGN) occupation fraction of ultra-diffuse galaxies (UDGs) in the nearby Coma cluster by utilizing XMM-Newton observ…
Probing within the Bondi radius of the ultramassive black hole in NGC 1600
J. Runge, S. A. Walker
We present deep (250 ks) Chandra observations of the nearby galaxy group NGC 1600, which has at its centre an ultramassive black hole (171.5 billion M). The exceptio…
Exploring the hot gaseous halo around an extremely massive and relativistic jet launching spiral galaxy with XMM-Newton
M. S. Mirakhor, S. A. Walker, J. Bagchi +6
We present a deep XMM-Newton observation of the extremely massive, rapidly rotating, relativistic-jet-launching spiral galaxy 2MASX J23453268-0449256. Diffuse X-ray emission from t…
Timing the earliest quenching events with a robust sample of massive quiescent galaxies at 2 < z < 5
A. C. Carnall, S. Walker, R. J. McLure +19
We present a sample of 151 massive () quiescent galaxies at , based on a sophisticated Bayesian spectral energy distribution fitting analy…
The Massively Accreting Cluster A2029
Jubee Sohn, Margaret J. Geller, Stephen A. Walker +3
We explore the structure of galaxy cluster Abell 2029 and its surroundings based on intensive spectroscopy along with X-ray and weak lensing observations. The redshift survey inclu…
XMM-Newton observation of the ultraluminous quasar SDSS J010013.02+280225.8 at redshift 6.326
Yanli Ai, A. C. Fabian, Xiaohui Fan +7
A brief Chandra observation of the ultraluminous quasar, SDSS J010013.02+280225.8 at redshift 6.326, showed it to be a relatively bright, soft X-ray source with a count rate of abo…