149 citations · 536 across the 18 of their papers we have counts for
18 papers
The Contribution of Quasar Absorption Outflows to AGN Feedback
Timothy R. Miller, Nahum Arav, Xinfeng Xu +1
Determining the distance of quasar absorption outflows from the central source (R) and their kinetic luminosity are crucial for understanding their contribution to active galactic…
HST/COS Observations of Quasar Outflows in the 500-1050 Angstrom Rest Frame: VII. Distances and Energetics for 11 Outflows in Five Quasars
Timothy R. Miller, Nahum Arav, Xinfeng Xu +2
From Hubble Space Telescope/Cosmic Origins Spectrograph spectra of five quasars, 16 outflows are detected. For 11 outflows, we are able to constrain their distances to the central…
HST/COS Observations of Quasar Outflows in the 500 -- 1050 Å Rest Frame: VI Wide, Energetic Outflows in SDSS J0755+2306
Xinfeng Xu, Nahum Arav, Timothy Miller +2
We present the analysis of two outflows (S1 at --5500 km s and S2 at --9700 km s) seen in recent HST/COS observations of quasar SDSS J0755+2306 (z = 0.854). The outfl…
HST/COS Observations of Quasar Outflows in the 500-1050 Å Rest Frame: V. Richness of Physical Diagnostics and Ionization Potential-dependent Velocity Shift in PKS J0352-0711
Timothy R. Miller, Nahum Arav, Xinfeng Xu +2
We analyze absorption troughs from two outflows within PKS J0352-0711 (S1 at 1950 km s and S2 at 3150 km s) from spectra taken with Hubble Space Telescope/Cosmi…
HST/COS Observations of Quasar Outflows in the 500 -- 1050 Å Rest Frame: IV. The Largest Broad Absorption Line Acceleration
Xinfeng Xu, Nahum Arav, Timothy Miller +2
We present an analysis of the broad absorption line (BAL) velocity shift that appeared in one of the outflow systems in quasar SDSS J1042+1646. Observations were taken by the Hubbl…
HST/COS Observations of Quasar Outflows in the 500-1050 Å Rest Frame: III. Four Similar Outflows in 2MASS J1051+1247 with Enough Energy to be Major Contributors to AGN Feedback
Timothy R. Miller, Nahum Arav, Xinfeng Xu +2
We detect four very energetic outflows in the Hubble Space Telescope/Cosmic Origin Spectrograph spectra of quasar 2MASS J1051+1247 with a combined kinetic luminosity ()…
HST/COS Observations of Quasar Outflows in the 500 -- 1050 Å Rest Frame: II The Most Energetic Quasar Outflow Measured to Date
Xinfeng Xu, Nahum Arav, Timothy Miller +2
We present a study of the BAL outflows seen in quasar SDSS J1042+1646 (z = 0.978) in the rest-frame 500 -- 1050 (EUV500) region. The results are based on the analysis of recent…
HST/COS Observations of Quasar Outflows in the 500-1050 Å Rest Frame: I. The Most Energetic Outflows in the Universe and Other Discoveries
Nahum Arav, Xinfeng Xu, Timothy R. Miller +2
The Hubble Space Telescope/Cosmic Origins Spectrograph (COS) has opened a new discovery space for studying quasar absorption outflows and their contribution to AGN feedback. Specif…
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…
HST/COS observations of the newly discovered obscuring outflow in NGC 3783
G. A. Kriss, M. Mehdipour, J. S. Kaastra +24
To understand the nature of transient obscuring outflows in active galactic nuclei, we observed the Seyfert 1 galaxy NGC 3783 on two occasions in December 2016 triggered by Swift m…
Co-spatial UV-optical HST/STIS Spectra of Six Planetary Nebulae: Nebular and Stellar Properties
Timothy R. Miller, Richard B. C. Henry, Bruce Balick +4
This paper represents the conclusion of a project that had two main goals: (1) to investigate to what extent planetary nebulae (PNe) are chemically homogeneous; and (2) to provide…
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_…
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…
ISM properties of a Massive Dusty Star-Forming Galaxy discovered at z ~ 7
M. L. Strandet, A. Weiß, C. De Breuck +28
We report the discovery and constrain the physical conditions of the interstellar medium of the highest-redshift millimeter-selected dusty star-forming galaxy (DSFG) to date, SPT-S…
Analysis of Co-spatial UV-optical STIS Spectra of Planetary Nebula NGC 3242
Timothy R. Miller, Richard B. C. Henry, Bruce Balick +4
This project sought to consider two important aspects of the planetary nebula NGC 3242 using new long-slit HST/STIS spectra. First, we investigated whether this object is chemicall…
Co-spatial Long-slit UV/Optical Spectra of Ten Galactic Planetary Nebulae with HST/STIS II. Nebular Models, Central Star Properties and He+CNO Synthesis
R. B. C. Henry, B. Balick, R. J. Dufour +5
The goal of the present study is twofold. First, we employ new HST/STIS spectra and photoionization modeling techniques to determine the progenitor masses of eight planetary nebula…
Near-infrared line identification in type Ia supernovae during the transitional phase
Brian Friesen, E. Baron, John P. Wisniewski +4
We present near-infrared synthetic spectra of a delayed-detonation hydrodynamical model and compare them to observed spectra of four normal type Ia supernovae ranging from day +56.…