Research Overview: Uncovering Hidden Monsters

All big galaxies host a supermassive black hole at their centers, more than a million times the mass of our Sun. These monsters are often lurking unseen behind thick blankets of dust. I use space telescopes to uncover the secrets at the centers of galaxies in the distant universe, 7-10 billion years in the past. This is an epoch in which galaxies have ample fuel for forming new stars and feeding their black holes. I research how these monsters grow and what impact they have on their host galaxies. I am anxiously waiting for the unprecedented look into the lives of these hidden monsters that will be revealed with the launch of NASA's next flagship mission, the James Webb Space Telescope, in 2021.

See some research highlights below.
Full list of publications on NASA/ADS.


Cold Quasars

A cold quasar is a very active supermassive black hole whose host galaxy still has a lot of cold gas in it. The quasar itself is blue, unobscured, and X-ray luminous. The host galaxy is only seen in the IR. These are some of the rarest quasars, comprising a mere 4% of the unobscured, quasar population.

Image from Kirkpatrick et al. (2019, submitted) and the DECal Legacy Surveys.

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Dusty Galaxy Templates

Publicly available templates based on how much the AGN continuum contributes to the mid-IR luminosity (0.0 means no contribution, 1.0 means 100% of mid-IR luminosity is due to continuum emission). These are ideal for use with z=0.3-2.8 IR sources.

Figure from Kirkpatrick et al. (2015)

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Color Selection with the James Webb Space Telescope

The Mid-Infrared Instrument (MIRI) on JWST will greatly improve our ability to detect hidden AGN galaxies with colors alone, due to the filters' sensitivity to the PAH features.

Figure from Kirkpatrick et al. (2017b)

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Research Group

Read more about how KU students are contributing to our understanding of active galactic nuclei.


Articles and videos in the press about newsworthy results.

Teaching Resources

Activities and assignments that I have created for my classes, shared for public use.