Publications & Presentations

First-author papers
FOTO: Figure-Level Semantic Search for Astronomy
Tohfa, H.; Villaescusa-Navarro, F. (2026)
In review · arXiv: 2609.30536 · Live demo
Two bits about lossy compression: On the limits of compression in cosmology
Tohfa, H. et al. (2026)
In review · arXiv: 2609.40239
An emulator for the ionizing photon mean free path in ultra-high resolution simulations: the implications of mean free path measurements for the reionization history
Tohfa, H.; Cain, C.; McQuinn, M.; D'Aloisio, A. (2026)
Journal of Cosmology and Astroparticle Physics, JCAP06(2026)094 · arXiv: 2602.03923
Forecast Cosmological Constraints with the 1D Wavelet Scattering Transform and the Lyman-α Forest
Tohfa, H.; Bird, S.; Ho, M.; Qezlou, M.; Fernandez, M. (2024)
Physical Review Letters, Vol. 132, No. 23
A Cosmic Microwave Background Search for Fine-Structure Constant Evolution
Tohfa, H.; Crump, J.; Baker, E.; Hart, L.; Grin, D.; Brosius, M.; Chluba, J. (2024)
Physical Review D, Vol. 109, No. 10
Co-authored papers
Multi-Method Machine Learning Classification of Astronomical Sources with Rubin Data Previews: a Spectroscopy-Free Approach with DP1 and DP2
Plazas Malagón, A. A. et al. including Tohfa, H. (2026)
Submitted to OJA · arXiv: 2610.20746
Breaking the Exoplanet Mass-Eccentricity Degeneracy: Combining Periodic Orbit Constraints with Transit Timing Variations
Chatchadanoraset, J.; Tohfa, H. et al. (2026)
In review
A self-consistent analytical model for both the photoionization rate and reionization history
Cain, C. et al. including Tohfa, H. (2026)
Submitted to JCAP · arXiv: 2606.19449
Introducing SAGUARO — Simulating IGM Evolution and Environments At High Resolution: Setup and First Results
Cain, C. et al. including Tohfa, H. (2026)
Accepted to JCAP · arXiv: 2603.25788
SN 2023ixf in Messier 101: Photo-ionization of Dense, Close-in Circumstellar Material in a Nearby Type II Supernova
Jacobson-Galan, W. V. et al. including Tohfa, H. (2023)
The Astrophysical Journal Letters, 954, L42
Selected presentations
AIDonut: First Real-Time Neural Network Control of Telescope Active Optics at the Vera Rubin Observatory
The 2026 AstroAI Workshop, Harvard University, 2026
AI Methods for the Rubin Active Optics System
Rubin Community Workshop, Stanford University, 2026
Machine Learning in Modern Astronomy (invited talk)
Haverford College, 2026
From Simulations to Emulators: Improving IGM Opacity Models for Cosmic Reionization
Kaba Kada: Exploring the First Billion Years of the Universe, Queensland, Australia, 2025
Forecast Cosmological Constraints with the 1D Wavelet Scattering Transform and the Lyman-α Forest
University of Washington, 2023
Fine structure constant variation
American Astronomical Society, CA, 2022
Fine structure constant variation
American Physical Society, NY, 2022
Understanding X-ray Cavities
MIT Summer Research Symposium, Massachusetts Institute of Technology, 2021
Fine structure constant variation due to spatial variation
Virtual Summer Research Symposium, Haverford College, 2020
Computing Lifshitz Field Theory Correlation Functions Using AdS/CFT
Summer Science Research Symposium, Bryn Mawr College, 2019 (with S. Pandey, F. Khan)
Bispectrum Analysis on Non-linear Systems
Spring Research Symposium, Bryn Mawr College, 2019 (with S. Pandey)