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| Seljak, Uroš | |
|---|---|
| Name | Uroš Seljak |
| Birth date | 1961 |
| Birth place | Ljubljana, Slovenia |
| Fields | Cosmology, Astrophysics, Computational Physics |
| Alma mater | University of Ljubljana, Princeton University |
| Doctoral advisor | Matias Zaldarriaga |
| Known for | Cosmic microwave background analysis, FAST-PT, halo model, Bayesian inference methods |
Seljak, Uroš
Uroš Seljak is a Slovenian-born theoretical cosmologist and computational physicist known for influential contributions to cosmic microwave background studies, large-scale structure analysis, and statistical methods in cosmology. His work spans collaborations with researchers at institutions such as Princeton University, University of California, Berkeley, Lawrence Berkeley National Laboratory, and the Institute for Advanced Study, and his methods have been applied in projects involving the Wilkinson Microwave Anisotropy Probe, Planck Collaboration, Baryon Oscillation Spectroscopic Survey, and Large Synoptic Survey Telescope planning.
Seljak was born in Ljubljana and completed undergraduate studies in physics at the University of Ljubljana before moving to the United States for graduate work. He obtained a Ph.D. from Princeton University under the supervision of Matias Zaldarriaga, producing doctoral research connected to the cosmic microwave background and perturbation theory. During this period he interacted with researchers from Institute for Advanced Study, Harvard University, Massachusetts Institute of Technology, and Yale University, situating him within a cohort that included contributors to foundational projects like COBE and later WMAP.
Seljak held postdoctoral and faculty positions across major research centers, including appointments at Princeton University and University of California, Berkeley. He was affiliated with Lawrence Berkeley National Laboratory and participated in collaborations with the Planck Collaboration, BOSS (Baryon Oscillation Spectroscopic Survey), and the Dark Energy Survey. He served as a professor and research scientist interacting with groups at Stanford University, University of Washington, Columbia University, and international centers such as CERN and Max Planck Institute for Astrophysics. Seljak has also been involved in advisory roles for missions and facilities like Euclid (spacecraft), LSST, and instrumentation teams linked to Subaru Telescope and Keck Observatory.
Seljak's research contributions encompass theoretical modeling, numerical techniques, and statistical inference applied to cosmological data. He developed and co-developed analytic and computational tools for interpreting anisotropies in the cosmic microwave background and clustering in the large-scale structure of the universe. Notable topics include work on the halo model for nonlinear clustering, perturbation theory approaches related to the Zeldovich approximation, and contributions to modeling weak gravitational lensing and redshift-space distortions used in surveys like SDSS and DESI.
He co-authored influential papers on parameter estimation methodologies drawing on Bayesian techniques that interfaced with algorithms used by the Planck Collaboration and WMAP teams, establishing connections with methods employed in analyses at LSST, Euclid (spacecraft), and WFIRST planning. Seljak contributed to faster power spectrum evaluation methods (e.g., FAST-PT) used by researchers affiliated with NASA, National Science Foundation, and multinational consortia including European Southern Observatory participants. His modeling of baryonic effects and contributions to simulation pipelines informed campaigns at Millennium Simulation teams and influenced modeling for Hubble Space Telescope surveys and calibration efforts for Atacama Cosmology Telescope and South Pole Telescope collaborations.
Seljak's investigations extended to primordial non-Gaussianity, inflationary model constraints tied to work by authors connected to Alan Guth, Andrei Linde, and constraints compared against results from BICEP2 and Keck Array. He also examined neutrino mass effects in cosmological observables, interfacing with particle physics experiments such as KATRIN and theoretical frameworks from Standard Model extensions studied at CERN.
Seljak's research has been recognized by awards and fellowships from institutions and societies including honors tied to American Physical Society activities, fellowships associated with National Science Foundation grants, and invited roles at Institute for Advanced Study. He has been an invited speaker at conferences hosted by International Astronomical Union, American Astronomical Society, and meetings such as those organized by Cosmology@Home-style consortia. His work has been cited in high-impact reports produced for agencies like NASA and the European Space Agency.
- Seljak, U., & Zaldarriaga, M. (1996). Work on cosmic microwave background polarization and anisotropies referenced in analyses by WMAP and Planck. - Seljak, U. et al. Papers on the halo model and nonlinear clustering used in SDSS and BOSS interpretations. - Seljak, U. Publications introducing FAST-PT style techniques for fast power spectrum convolution applied in DES and LSST forecasting. - Seljak, U. Contributions to studies constraining neutrino masses combining cosmological data sets used by Planck and BOSS consortia. - Seljak, U. Papers on primordial non-Gaussianity and inflationary constraints referenced alongside work by Guth and Linde.
Seljak maintains collaborations across North American and European institutions, mentoring students and postdocs who have taken positions at places like Princeton University, Stanford University, Harvard University, and University of Cambridge. His computational tools and analytic frameworks persist in common use by projects such as Planck Collaboration, DESI, LSST, and Euclid (spacecraft). Seljak's legacy is reflected in methodological advances bridging theoretical cosmology and observational campaigns at facilities including Atacama Cosmology Telescope, South Pole Telescope, Subaru Telescope, and space missions backed by NASA and ESA.
Category:Cosmologists Category:Slovenian scientists