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Cosmology is the study of the history of our universe on the largest scales that exist. On scales between individual galaxies and galaxy clusters, the universe evolves primarily due to the distribution of dark matter, and on even larger scales, the universe is driven by dark energy. Observational cosmology is conducted in a variety of ways, including observing many type-IA supernovae (standard candles), fluctuations in the density of visible matter over large scales (baryon acoustic oscillations), and the remnant radio light from the very early Universe (cosmic microwave background). More recently, by combining gravitational-wave and electromagnetic signals from a single source (standard sirens), we can construct yet another way to measure the Universe. We can also observe the hydrogen gas between galaxies and its distribution throughout the Universe (21-cm cosmology).

Researchers in this area include:

Sean McWilliams (standard sirens)
Kevin Bandura (21-cm cosmology)
Maura McLaughlin

Recent publications: 

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration, 2021, Constraints on the cosmic expansion history from GWTC-3arXiv e-prints.  

Crichton, Devin, Aich, Moumita, Amara, Adam, Bandura, Kevin, Bassett, Bruce A., Bengaly, Carlos, Berner, Pascale, Bhatporia, Shruti, Bucher, Martin, Chang, Tzu-Ching, Chiang, H. Cynthia, Cliche, Jean-Francois, Crichton, Carolyn, Dave, Romeel, de Villiers, Dirk I. L., Dobbs, Matt A., Ewall-Wice, Aaron M., Eyono, Scott, Finlay, Christopher, Gaddam, Sindhu, Ganga, Ken, Gayley, Kevin G., Gerodias, Kit, Gibbon, Tim, Gumba, Austin, Gupta, Neeraj, Harris, Maile, Heilgendorf, Heiko, Hilton, Matt, Hincks, Adam D., Hitz, Pascal, Jalilvand, Mona, Julie, Roufurd, Kader, Zahra, Kania, Joseph, Karagiannis, Dionysios, Karastergiou, Aris, Kesebonye, Kabelo, Kittiwisit, Piyanat, Kneib, Jean-Paul, Knowles, Kenda, Kuhn, Emily R., Kunz, Martin, Maartens, Roy, MacKay, Vincent, MacPherson, Stuart, Monstein, Christian, Moodley, Kavilan, Mugundhan, V., Naidoo, Warren, Naidu, Arun, Newburgh, Laura B., Nistane, Viraj, Di Nitto, Amanda, Ölçek, Deniz, Pan, Xinyu, Paul, Sourabh, Peterson, Jeffrey B., Pieters, Elizabeth, Pieterse, Carla, Pillay, Aritha, Polish, Anna R., Randrianjanahary, Liantsoa, Refregier, Alexandre, Renard, Andre, Retana-Montenegro, Edwin, Rout, Ian H., Russeeawon, Cyndie, Vafaei Sadr, Alireza, Saliwanchik, Benjamin R. B., Sampath, Ajith, Sanghavi, Pranav, Santos, Mario G., Sengate, Onkabetse, Shaw, J. Richard, Sievers, Jonathan L., Smirnov, Oleg M., Smith, Kendrick M., Armel Mbou Sob, Ulrich, Srianand, Raghunathan, Stronkhorst, Pieter, Sunder, Dhaneshwar D., Tartakovsky, Simon, Taylor, Russ, Timbie, Peter, Tolley, Emma E., Townsend, Junaid, Tyndall, Will, Ungerer, Cornelius, van Dyk, Jacques, van Vuuren, Gary, Vanderlinde, Keith, Viant, Thierry, Walters, Anthony, Wang, Jingying, Weltman, Amanda, Woudt, Patrick, Wulf, Dallas, Zavyalov, Anatoly, and Zhang, Zheng, 2021, The Hydrogen Intensity and Real-time Analysis eXperiment: 256-Element Array Status and OverviewarXiv e-prints.

Heimersheim, Stefan, Sartorio, Nina, Fialkov, Anastasia, and Lorimer, Duncan R., 2021, What it takes to measure reionization with fast radio burstsarXiv e-prints.  

Petroff, E., Hessels, J. W. T., and Lorimer, D. R., 2021, Fast radio bursts at the dawn of the 2020sarXiv e-prints. 

Ligo Scientific Collaboration, VIRGO Collaboration, and Kagra Collaboration, 2021, Constraints on Cosmic Strings Using Data from the Third Advanced LIGO-Virgo Observing RunPhysical Review Letters, 126.