247 citations · 891 across the 11 of their papers we have counts for
11 papers
Multi-wavelength campaign on NGC 7469 V. Analysis of the HST/COS observations: Super solar metallicity, distance, and trough variation models
N. Arav, X. Xu, G. A. Kriss +18
Aims. Our aim is to determine the distance of the UV outflow components from the central source, their abundances and total column density, and the mechanism responsible for their…
Multi-wavelength Campaign on NGC 7469 VI. Photoionisation Modelling of the Emission Line Regions and the Warm Absorber
S. Grafton-Waters, G. Branduardi-Raymont, M. Mehdipour +16
Aims. We aim to investigate and characterise the photoionised X-ray emission line regions within NGC 7469. Methods. We apply the photoionisation model, PION, within the spectral fi…
Evidence that 50% of BALQSO Outflows Are Situated at Least 100 pc from the Central Source
Nahum Arav, Guilin Liu, Xinfeng Xu +3
The most robust way for determining the distance of quasar absorption outflows is the use of troughs from ionic excited states. The column density ratio between the excited and res…
Multi-wavelength campaign on NGC 7469: III. Spectral energy distribution and the AGN wind photoionisation modelling, plus detection of diffuse X-rays from the starburst with Chandra HETGS
M. Mehdipour, J. S. Kaastra, E. Costantini +15
We investigate the physical structure of the AGN wind in the Seyfert-1 galaxy NGC 7469 through high-resolution X-ray spectroscopy with Chandra HETGS and photoionisation modelling.…
Extreme Variability in a Broad Absorption Line Quasar
Daniel Stern, Matthew J. Graham, Nahum Arav +9
CRTS J084133.15+200525.8 is an optically bright quasar at z=2.345 that has shown extreme spectral variability over the past decade. Photometrically, the source had a visual magnitu…
Strong Candidate for AGN Feedback: VLT/X-shooter Observations of BALQSO SDSS J0831+0354
Carter Chamberlain, Nahum Arav, Chris Benn
We measure the location and energetics of a SIV BALQSO outflow. This ouflow has a velocity of 10,800 km s and a kinetic luminosity of erg s, which is 5.2%…