Active Galactic Nucleus Feedback

Investigating where AGN outflows interact with highly ionized X-ray-emitting and warm ionized gas in nearby active galaxies.

Conceptual illustration of highly ionized X-ray-emitting and warm ionized gas associated with an active galactic nucleus.
Conceptual illustrationVisualization: Anna Trindade Falcão

How I investigate this question

I compare resolved X-ray morphology and spectroscopy with optical and infrared emission-line structure from the nuclear region to galaxy scales.

Observatories

ChandraHubbleVLT

What the observations allow us to test

Spatial correspondence identifies candidate interaction sites; demonstrating feedback requires independent constraints on gas dynamics, ionization, and the transfer of energy or momentum.

Questions guiding this work

01

Where do observations indicate that an AGN-driven wind may first interact with the surrounding interstellar medium?

02

How do the observable signatures of feedback change from nuclear to kiloparsec scales?

03

Which gas phases provide the strongest constraints on the energy and momentum transferred to the host?

Publications and research highlights

storyHot X-Ray WindsRead the story featured releaseWinds from Supermassive Black HolesExplore publicationHot, Photoionized X-Ray Gas in Two Luminous Type 2 QuasarsView publication publicationPhysical Properties of Ionized Outflows in Nearby Type 2 QuasarsSpatially resolved Hubble constraints on ionized-gas mass, energetics, and outflow extent.View publication publicationHubble Space Telescope [O III] Emission-Line Kinematics in Two Nearby Type 2 Quasars: A Case for X-Ray FeedbackIonized-gas kinematics connecting nuclear activity with galaxy-scale feedback.View publication publicationTracking X-Ray Outflows with Optical and IR Footprint LinesPhotoionization diagnostics linking high-ionization optical and infrared lines to X-ray-emitting winds.View publication publicationDeep Chandra Observations of NGC 5728: Morphology and Spectral Properties of the Extended X-Ray EmissionResolved Chandra evidence for extended emission along and across the ionization cone.View publication