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Education

  • Ph.D., Astrophysics, University of California, Berkeley, 2020
  • M.S., Astrophysics, University of California, Berkeley, 2017
  • B.S., Physics, Astronomy, University of Michigan, 2015

Appointments

  • NASA Hubble Fellow, University of Michigan, 2023 – present
  • Pappalardo Fellow, Massachusetts Institute of Technology, 2020 – 2023

Publications

Lead author (9), and *student-advised (3). See my ADS library for a full list of publications.

Kern, N. 2025, “A Differentiable, End-to-End Forward Model for 21 cm Cosmology: Estimating the Foreground, Instrument, and Signal Joint Posterior.” MNRAS 541 687K, arXiv:2504.07090

*Charles, N., Kern, N., Bernardi, G. et al. 2024, “Mitigating calibration errors from mutual coupling with time-domain filtering.” MNRAS 534 3349C, arXiv:2407.20923

*Kim, H., Kern, N., Hewitt, J. et al. 2023, “The Impact of Beam Variations on Power Spectrum Estimation for 21 cm Cosmology. II. Mitigation of Foreground Systematics for HERA.” ApJ 953 136, arXiv:2307.12826

*Charles, N., Kern, N., Bernardi, G. et al. 2023, “On the use of temporal filtering for mitigating galactic synchrotron calibration bias in 21 cm reionization observations.” MNRAS 522 1009C, arXiv:2302.00269

Barry, N., Bernardi, G., Greig, B., Kern, N. (lead author), and Mertens, F. 2022, “SKA-Low Intensity Mapping Pathfinder Updates: Deeper 21 cm Power Spectrum Limits from Improved Analysis Frameworks.” JATIS 8a1007B, arXiv:2110.06173

HERA Collaboration 2022, including Kern, N. (lead author), “First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum.” ApJ 925 221A, arXiv:2108.02263

Kern, N. and Liu, A. 2021, “Gaussian Process Foreground Subtraction and Power Spectrum Estimation for 21 cm Cosmology.” MNRAS 501 1463K, arXiv:2010.15892

Kern, N., Dillon, J., Parsons, A. et al. 2020, “Absolute Calibration Strategies for the Hydrogen Epoch of Reionization Array and Their Impact on the 21 cm Power Spectrum.” ApJ 890 122, arXiv:1910.12943

Kern, N., Parsons, A., Dillon, J. et al. 2020, “Mitigating Internal Instrument Coupling for 21cm Cosmology. II. A Method Demonstration with the Hydrogen Epoch of Reionization Array.” ApJ 888 70, arXiv:1909.11733

Kern, N., Parsons, A., Dillon, J. et al. 2019, “Mitigating Internal Instrument Coupling for 21cm Cosmology. I. Temporal and Spectral Modeling in Simulations.” ApJ 884 105, arXiv:1909.11732

Kern, N., Liu, A., Parsons, A. et al. 2017, “Emulating Simulations of Cosmic Dawn for 21 cm Power Spectrum Constraints on Cosmology, Reionization and X-ray Heating.” ApJ 848 23, arXiv:1705.04688

Kern, N., Keown, J., Tobin, J., et al. 2016, “Radio properties of young stellar objects in the Serpens South Infrared Dark Cloud.” AJ 151 42, arXiv:1511.09082