399 citations · 3.4k across the 51 of their papers we have counts for
9 papers · 1 filter
WEAVE-StePS. A stellar population survey using WEAVE at WHT
A. Iovino, B. M. Poggianti, A. Mercurio +44
The upcoming new generation of optical spectrographs on four-meter-class telescopes will provide valuable opportunities for forthcoming galaxy surveys through their huge multiplexi…
Evidence that Emission and Absorption Outflows in Quasars Are Related
Xinfeng Xu, Nadia Zakamska, Nahum Arav +2
We analyze VLT/X-shooter data for 7 quasars, where we study the relationships between their broad absorption line (BAL) and emission line outflows. We find: 1) the luminosity of th…
Distance, Energy, and Variability of Quasar Outflows: Two HST/COS epochs of LBQS 1206+1052
Timothy R. Miller, Nahum Arav, Xinfeng Xu +4
We analyze new HST/COS spectra for two quasar absorption outflows seen in the quasi-stellar object LBQS 1206+1052. These data cover, for the first time, absorption troughs from $S_…
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…
A Mini-BAL Outflow at 900 pc from the Central Source: VLT/X-shooter Observations
Xinfeng Xu, Nahum Arav, Timothy Miller +1
We determine the physical conditions and location of the outflow material seen in the mini-BAL quasar SDSS J1111+1437 (z = 2.138). These results are based on the analysis of a high…
VLT/X-Shooter Survey of BAL Quasars: Large Distance Scale and AGN Feedback
Xinfeng Xu, Nahum Arav, Timothy Miller +1
We conducted a survey of quasar outflows using the VLT/X-shooter spectrograph. When choosing the 14 BAL and mini-BALs comprising this sample, the data did not cover the S IV and S…