Astrophysics PhD candidate

Hannah E.
McCall

I study black holes and galaxy clusters using X-ray observations.

The University of Chicago
Hannah McCall in the garden of Schloss Koblenz
  • X-ray astronomy
  • AGN feedback
  • Galaxy clusters
  • AGN outflows

About me

I’m a fifth-year PhD candidate in the Department of Astronomy and Astrophysics at the University of Chicago. My research explores active galactic nuclei (AGN) feedback at all scales, from outflows close to the black hole to feedback's impact on the gas in galaxy clusters. I use X-ray observations from XRISM, Chandra, eROSITA, XMM-Newton, NuSTAR and Swift.

Before I came to Chicago, I earned my undergraduate degree in physics at Washington University in St. Louis, where I studied the X-ray binary GX 301-2 with NICER. I then spent two years in Germany completing my master’s in astrophysics at the Argelander-Institut für Astronomie at Universität Bonn, studying the outskirts of the Virgo Cluster with eROSITA.

I use X-ray observations to study how black holes interact with their environments.

The XRISM X-ray spectrum of M87 overlaid on a Rubin optical view of the Virgo cluster stars and galaxies M87 · A new view with XRISM

XRISM · Galaxy cluster kinematics

Hot gas motions in M87

M87, the central galaxy of the Virgo Cluster, offers a close-up view of AGN feedback in a cluster. I led a study using XRISM to measure the motions of hot gas in its innermost regions, probing feedback on scales as small as 5 kiloparsecs.

An X-arithmetic image of the Perseus Cluster, with hot-gas structures highlighted in blue, magenta, and yellow Perseus Cluster · X-arithmetic

Chandra · X-arithmetic

Structure in 15 galaxy groups and clusters

Black holes in galaxy clusters create structures in the hot gas around them. I applied X-arithmetic, an image-analysis technique, to 15 galaxy groups and clusters observed with Chandra to efficiently identify the nature of these structures.

CV

Download CV

PDF · 2-page 2026 edition

University of Chicago

2022 — present

PhD, Astronomy & Astrophysics · In progress

Thesis: X-ray View of the Interplay Between Active Galactic Nuclei and their Host Halos.

Universität Bonn

2020 — 2022

MSc, Astrophysics

Thesis: X-ray imaging analysis of the Virgo Cluster with eROSITA. Read the published work.

Washington University in St. Louis

2016 — 2020

BA, Physics · High Distinction

Minors in Mathematics and Women, Gender, and Sexuality Studies.

Contact

For research questions and collaborations.

Address

Department of Astronomy and Astrophysics
The University of Chicago
William Eckhardt Research Center, room 526
5640 South Ellis Avenue
Chicago, Illinois 60637