I’m an NSF Fellow in the Department of Astronomy at the University of Illinois, Urbana-Champaign (UIUC), where I use early-time data and machine learning to study the astrophysical systems that the Universe lets us watch evolve in real time (supernovae, kilonovae, gamma-ray bursts, etc). I was a Pre-Doctoral Fellow at the Flatiron Institute's Center for Computational Astrophysics in Spring 2021. I received my Bachelor’s degree in Computational Modeling and Data Analytics from Virginia Tech.
I’m also passionate about building community and creating welcoming spaces within astrophysics. I founded astro[sound]bites, the audio counterpart to the popular blog astrobites, to highlight the work of early-career scientists. I also lead Astronomy Cultural Journal Clubs at UIUC, and I've spearheaded outreach projects in the US, Gabon, and India. In my free time, you can find me practicing cello, biking and running (I ran my first marathon in 2021!), and learning about the incredible diversity of animals with which we share the planet.
download my CV here.
Rapid Inference from Survey Streams
Rubin, Roman, and JWST will revolutionize our understanding of the time-domain sky, but only if we have the architecture in place to investigate the weird, unexpected phenomena that they will discover. I develop fast, scalable methods to find and prioritize events within massive survey streams, and am an active member of the ANTARES alert broker.
Transient-Host Galaxy Studies
The local environment where transients occur can provide tantalizing evidence for the nature of their progenitors. Within
the Dark Energy Science Collaboration., I combine observations with state-of-the-art simulations to investigate these correlations for poorly-understood classes of events.
Early-Time Supernova Signatures
Data obtained in the first few days of an explosion provide an in-depth view into the final moments of a star's life and the earliest moments of its death. As a member of
the Young Supernova Experiment, I search for these young transients and model signatures of shock breakout, CSM interaction, and flash ionization.
Chemical Enrichment from High Redshift Supernovae
Multi-scale simulations are required to understand the atomic and molecular chemistry of the early Universe. At the Los Alamos National Laboratory, I built a chemical solver that runs inline with cosmological simulations and probed the abundances of formed CO, OH, and H2O.
Gagliano, Alexander; Izzo, Luca; Kilpatrick, Charles D.; Mockler,
Brenna; Jacobson-Galán, Wynn Vicente; Terreran, Giacomo; Dimitriadis,
Georgios; Zenati, Yossef; Auchettl, Katie; Drout, Maria R.; Narayan,
Gautham; Foley, Ryan J.; Margutti, R.; Rest, Armin; Jones, D. O.;
Aganze, Christian; Aleo, Patrick D.; Burgasser, Adam J.; Coulter, D. A.;
Gerasimov, Roman; Gall, Christa; Hjorth, Jens; Hsu, Chih-Chun; Magnier,
Eugene A.; Mandel, Kaisey S.; Piro, Anthony L.; Rojas-Bravo, César;
Siebert, Matthew R.; Stacey, Holland; Stroh, Michael Cullen; Swift,
Jonathan J.; Taggart, Kirsty; Tinyanont, Samaporn (for the Young Supernova Experiment),
An Early-time Optical and Ultraviolet Excess in the Type-Ic SN 2020oi,
The Astrophysical Journal, vol. 924, no. 2, pp. 55-110, 2022. doi:10.3847/1538-4357/ac35ec.
Jones, D. O., Foley, R. J., Narayan, G., Hjorth, J., Huber, M. E.,
Aleo, P. D., Alexander, K. D., Angus, C. R., Auchettl, K., Baldassare,
V. F., Bruun, S. H., Chambers, K. C., Chatterjee, D., Coppejans, D. L.,
Coulter, D. A., DeMarchi, L., Dimitriadis, G., Drout, M. R., Engel, A.,
French, K. D., Gagliano, A., Gall, C., Hung, T., Izzo, L., Jacobson-
Galán, W. V., Kilpatrick, C. D., Korhonen, H., Margutti, R., Raimundo,
S. I., Ramirez-Ruiz, E., Rest, A., Rojas-Bravo, C., Siebert, M. R.,
Smartt, S. J., Smith, K. W., Terreran, G., Wang, Q., Wojtak, R.,
Agnello, A., Ansari, Z., Arendse, N., Baldeschi, A., Blanchard, P. K.,
Brethauer, D., Bright, J. S., Brown, J. S., de Boer, T. J. L., Dodd, S.
A., Fairlamb, J. R., Grillo, C., Hajela, A., Hede, C., Kolborg, A. N.,
Law-Smith, J. A. P., Lin, C. -C., Magnier, E. A., Malanchev, K.,
Matthews, D., Mockler, B., Muthukrishna, D., Pan, Y. -C., Pfister, H.,
Ramanah, D. K., Rest, S., Sarangi, A., Schrøder, S. L., Stauffer, C.,
Stroh, M. C., Taggart, K. L., Tinyanont, S., Wainscoat, R. J. (for the Young
The Young Supernova Experiment: Survey Goals, Overview, and Operations,
The Astrophysical Journal, vol 908, no. 2, pp. 143-167, 2021. doi:10.3847/1538-4357/abd7f5.
Gagliano, A., Narayan, G., Engel, A., and Kind, M.C. (for the LSST Dark Energy Science Collaboration), GHOST: Using Only Host Galaxy Information to Accurately Associate and Distinguish Supernovae,
The Astrophysical Journal, vol. 908,
no. 170, pp. 1-23, 2021. doi:10.3847/1538-4357/abd02b.
Madrid, Juan P., O'Neill, Conor R., Gagliano, Alexander T., Marvil, Joshua R.,
A Wide-field Map of Intracluster Globular Clusters in Coma, The Astrophysical Journal, vol. 867, no. 2, pp. 144-157, 2018. doi:10.3847/1538-4357/aae206.
Recent and Upcoming Talks
I maintain/contribute to multiple open source software projects.
Outreach & Academic Service
Astronomy Cultural Journal Club (ACJC)
Through the Society for Equity in Astronomy (SEA), I organize and lead monthly discussions within my department on topical issues in equity and inclusion. Notes from this semester's discussions can be found below.
I am a creator and host of the podcast astro[sound]bites, where I discuss recent astronomy research with other graduate students. We amplify the voices of early-career scientists through regular interviews and explore sound-based representations of astronomy data. To date, we've published over 72 episodes, received outreach grants from the ASP, AGU, and AAS, and have listeners in 56 countries. Find our website
Astronomy on Tap Champaign-Urbana
I'm a local organizor for UIUC's chapter of Astronomy on Tap, which takes place at The Literary in downtown Champaign the third Thursday of every month. I've given two talks to date, the most recent in Fall 2021 titled The Stargazing Machine: Building Software to Study Cosmic Explosions (and End World Hunger)".
Sounds of the Spectrum
As part of the 2017 Story of Space, an exploration of the overlap between astronomy and art, I designed and implemented an interactive exhibit exploring the chemical composition of the universe through sound. The exhibit ran for a week in Goa, India and reached thousands of members of the public. Read more about it
here and here.
You are welcome to use these for your own talks (but please credit me)! Click a video to download it.
1. Optical spectral sequence of a type Ia supernova. Movie inspired by The Supernova Cosmology Project and data interpolated
from the 'SUGAR' SN Ia spectral templates at http://supernovae.in2p3.fr/sugar/#sec-3.
2. Mollweide sky map of supernovae classified (spectroscopically or photometrically) from 1800 to 2022. Right histogram shows breakdown by redshift.