Publications
Research on accretion, outflows, and active galaxies
The publication record spans spatially resolved AGN feedback, extended X-ray emission, multiphase gas, and compact active nuclei, from obscured Seyfert galaxies to luminous quasars.
Research highlights
Black-hole winds and dual active nuclei
![Side-by-side observational composites of 2MASX J13003807+5454367 and FIRST J120041.4+314745, with Chandra X-rays in red, Hubble [O III] emission in green, and Hubble stellar continuum in blue.](/_next/image?url=%2Fimages%2Fpress%2Fquasar-winds%2Fhero-quasar-winds-clean.png&w=3840&q=75)
The Astrophysical Journal · 2026
Hot, Photoionized X-Ray Gas in Two Luminous Type 2 Quasars: Chandra–HST Evidence for a Wind-driven Sequence
Chandra and Hubble observations compare extended X-ray emission with [O III] morphology and optically measured kinematics in two luminous type 2 quasars.
Chandra · HubbleRead publication →
The Astrophysical Journal · 2024
Resolving a Candidate Dual Active Galactic Nucleus with ∼100 pc Separation in MCG-03-34-64
Multiwavelength observations identify a candidate dual active galactic nucleus in MCG-03-34-64 on an approximately 100 pc scale; the current data do not yet uniquely exclude a single-AGN plus shocked-gas interpretation.
Chandra · Hubble · XMM-Newton · NuSTAR · VLARead publication →Publication record
Research articles
Hot, Photoionized X-Ray Gas in Two Luminous Type 2 Quasars: Chandra-HST Evidence for a Wind-driven Sequence
ApJ 1000, 242 (2026)
Chandra/ACIS imaging spectroscopy with Hubble imaging and STIS spectroscopy
Chandra · Hubble
Mapping the Excitation Mechanisms in the LINER I Active Galactic Nucleus NGC 5005: Positive Feedback and a Thin LINER Cocoon
ApJ 986, 175 (2025)
Hubble emission-line imaging with archival eMERLIN radio and CO(1-0) measurements
Hubble Space Telescope · eMERLIN · Owens Valley Radio Observatory millimeter array
The X-Ray Emission of NGC 5005: An Unobscured Low-luminosity Active Galactic Nucleus with a Weakly Accreting Broad-line Region
ApJ 993, 247 (2025)
Chandra imaging spectroscopy with NuSTAR, Swift, and archival Hubble comparisons
Chandra · Hubble · NuSTAR · Swift
Hubble Space Telescope observations of nearby type 1 quasars. I. Characterization of the extended [O III] 5007 Å emission
MNRAS 535(1), 621–633 (2024)
Hubble/ACS narrow-band [O III] and continuum imaging of seven PG quasars
Hubble Space Telescope (ACS/WFC)
Resolving a Candidate Dual Active Galactic Nucleus with ∼100 pc Separation in MCG-03-34-64
ApJ 972, 185 (2024)
Chandra, Hubble, XMM-Newton, NuSTAR, and VLA observations of MCG-03-34-64
Chandra · Hubble · NuSTAR · XMM-Newton · VLA
Deep Chandra Observations of NGC 5728. III. Probing the High-resolution X-Ray Morphology and Multiphase Interstellar Medium Interactions in the Circumnuclear Region
ApJ 977, 275 (2024)
Chandra imaging spectroscopy with ALMA CO, VLT/MUSE, VLT/SINFONI, and Hubble data
Chandra · Hubble · ALMA · VLT/MUSE · VLT/SINFONI
Discovery of Kiloparsec-scale Semirelativistic Fe Kα Complex Emission in NGC 5728
ApJ 963, 6 (2024)
Deep Chandra/ACIS spectroscopy and energy-resolved imaging of extended Fe K emission
Chandra
Deep Chandra Observations of NGC 5728: Morphology and Spectral Properties of the Extended X-Ray Emission
ApJ 950, 143 (2023)
Deep Chandra/ACIS imaging spectroscopy of the nucleus, bicone, and cross-cone regions
Chandra
Tracking X-ray outflows with optical/infrared footprint lines
MNRAS 511(1), 1420–1430 (2022)
Hubble/STIS spectroscopy and WFPC2 imaging with infrared and prior Chandra/HETG measurements
Hubble Space Telescope (STIS and WFPC2) · Chandra (prior HETG analysis)
Hubble Space Telescope observations of [O III] emission in nearby QSO2s: physical properties of the ionized outflows
MNRAS 500(1), 1491–1504 (2021)
Hubble/ACS [O III] imaging and STIS long-slit spectroscopy of nearby type 2 quasars
Hubble Space Telescope (ACS/WFC and STIS)
Hubble Space Telescope [O III] emission-line kinematics in two nearby QSO2s: a case for X-ray feedback
MNRAS 505(2), 3054–3069 (2021)
Hubble imaging and STIS spectroscopy, with Chandra imaging and APO coronal-line measurements
Apache Point Observatory · Chandra · Hubble