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Department of Physics

Lado Samushia

Lado SamushiaAssociate Professor
13 Cardwell Hall
lado@phys.ksu.edu
Group webpage

Ph.D. Kansas State University, 2009

Research Area

Cosmology

Recent cosmological observations show that dark matter makes 25 percent of the Universe and that dark energy makes about 70 percent. The exact nature of dark matter and dark energy are yet to be determined.

I am using 3D maps of galaxy distribution from current spectroscopic galaxy surveys to study the properties of dark energy. We also study the properties of gravitational interactions with these large datasets and check whether Einstein's General Relativity is a correct theory of gravity. A good example of this is how we used SDSS-III data to measure the distances to remote galaxies with better than 1 percent precision and to measure the expansion rate of the Universe with a 4 percent precision (http://mnras.oxfordjournals.org/content/439/4/3504).

The next generation of spectroscopic galaxy surveys will provide us with data that's orders of magnitude larger than what we have today. I am involved with the Euclid satellite mission (http://www.euclid-ec.org), the DESI mission (http://desi.lbl.gov), and the Roman telescope (https://roman.gsfc.nasa.gov/).

Research Support

  • Department of Energy
  • NASA

Graduate Advisees

  • Jayashree Behera
  • Abhishek Jana
  • Hanyu Zhang

Postdoctoral Advisee

  • Mehdi Rezaie

Recent Selected Publications

L. Samushia, Z. Slepian, F. Villaescusa-Navarro, Information content of higher order galaxy correlation functions, Monthly Notices of the Royal Astronomical Society, Volume 505, 1,628–641 (2021). [link]

S. Ferraro, M.J. Wilson, M. Abidi, D. Alonso, B. Ansarinejad et al., Inflation and Dark Energy from spectroscopy at z > 2. Bulletin of the American Astronomical Society 51, 3 (2020). [link]

A.J. Ross, L. Samushia, C. Howlett, W.J. Percival, A. Burden, and M. Manera, Clustering of the SDSS DR7 main galaxy sample. VizieR Online Data Catalog, (2020). [link]

K. N. Abazajian, Z. Ahmed, D. Alonso, M.A. Amin, B. Ansarinejad, et al. Dark Energy and Modified Gravity (2019). [link]
 

D.W. Pearson and L. Samushia, Computing three-point correlation function randoms counts without the randoms catalogue, Monthly Notices of the Royal Astronomical Society: Letters, Volume 486, Issue 1, June 2019, Pages L105–L109 (2019).  [link]