Stephanie O'Neil

Astrophysics Postdoc at University of Pennsylvania and Princeton

A listing of my papers is below and can also be found here.

First author papers

  1. S. O'Neil, J. Borrow, M. Vogelsberger, H. Zhao, B. Wang. How time weathers galaxies: The temporal impact of the cluster environment on galaxy formation and evolution. 2024, MNRAS, 530, 3, 3310-3326. [ads]
  2. S. O’Neil, M. Vogelsberger, S, Heeba, K. Schutz, J.C. Rose, P. Torrey, J. Borrow, R. Low, R. Adhikari, M.V. Medvedev, T.R. Slatyer, J. Zavala. Endothermic self-interacting dark matter in Milky Way-like haloes. 2023, MNRAS, 524, 1, 288-306 [ads]
  3. S. O’Neil, J. Borrow, M. Vogelsberger, B. Diemer. The impact of galaxy selection on the splashback boundaries of galaxy clusters. 2022, MNRAS, 513, 1, 835-852 [ads]
  4. S. O’Neil, D. J. Barnes, M. Vogelsberger, B. Diemer. The splashback boundary of haloes in hydrodynamic simulations. 2021, MNRAS, 504, 3, 4649-4666 [ads]

Student papers

  1. X. Sun, S. O'Neil, X. Shen, M. Vogelsberger. The effects of projection on measuring the splashback feature. arXiv:2503.04882 [ads]
  2. V. Tran, D. Gilman, M. Vogelsberger, X. Shen, S. O'Neil, X. Zhang. Gravothermal Catastrope in Resonant Self-interacting Dark Matter Models. 2024, PRD, 110, 4, 12pp. [ads]
  3. A. Leonard, S. O’Neil, X. Shen, M. Vogelsberger, O. Rosenstein, H. Shangguan, Y. Teng, J. Hu. Varying primordial state fractions in exo- and endothermic SIDM simulations of Milky Way-mass haloes. 2024, MNRAS, 531, 1, 1440-1453. [ads]

Coauthor papers

  1. W. Qin, K. Schutz, O. Rosenstein, S. O'Neil, M. Vogelsberger. Supersizing hydrodynamical simulations of reionization using perturbative techniques. arXiv: 2504.02929 [ads]
  2. V. Tran, X. Shen, D. Gilman, M. Vogelsberger, S. O'Neil, D. Xiong, J. Hu, Z. Wu. Ain't no resonance high enough: Core collapse in self-interacting dark matter across two decades in halo mass. arXiv: 2504.02928 [ads]
  3. R. Low, R. Adhikari, J.C. Rose, S. O'Neil, M. Medvedev, P. Torrey, M. Vogelsberger. Structure Formation under Inelastic Two-Component Dark Matter: Halo Statistics and Matter Power Spectra in the High-z Universe. arXiv:2503.05881 [ads]
  4. V. Tran, X. Shen, M. Vogelsberger, D. Gilman, S. O'Neil, J. Gao. A Novel Density Profile for Isothermal Cores of Dark Matter Halos. arXiv:2411.11945 [ads]
  5. T. Nguyen, F. Villaescusa-Navarro, S. Mishra-Sharma, C. Cuesta-Lazaro, P. Torrey, A. Farahi, A.M. Garcia, J.C. Rose, S. O'Neil, M. Vogelsberger, X. Shen, C. Roche, D. Anglés-Alcázar, N. Kallivayalil, J.B. Muñoz, F.-Y. Cyr-Racine, S. Roy, L. Necib, K.E. Kollmann. How DREAMS are made: Emulating Satellite Galaxy and Subhalo Populations with Diffusion Models and Point Clouds. arXiv:2409.02980 [ads]
  6. T.M. O'Shea, J. Borrow, S. O'Neil, M. Vogelsberger. Dynamical friction and measurements of the splashback radius in galaxy clusters. arXiv:2405.18468 [ads]
  7. J.C. Rose, P. Torrey, F. Villaescusa-Navarro, M. Lisanti, T. Nguyen, S. Roy, K.E. Kollmann, M. Vogelsberger, F.-Y. Cyr-Racine, M.V. Medvedev, S. Genal, D. Anglés-Alcázar, N. Kallivayalil, B.Y. Wang, B. Costanza, S. O'Neil, C. Roche, S. Karmakar, A.M. Garcia, R. Low, S. Lin, O. Mostow, A. Cruz, A. Caputo, A. Farahi, J.B. Muñoz, L. Necib, R. Teyssier, J.J. Dalcanton, D. Spergel. Introducing the DREAMS Project: DaRk mattEr and Astrophysics with Machine learning and Simulations. arXiv:2405.00766 [ads]
  8. J.C. Rose, P. Torrey, F. Villaescusa-Navarro, M. Vogelsberger, S. O'Neil, M.V. Medvedev, R. Low, R. Adhikari, D. Anglés-Alázar. Inferring warm dark matter masses with deep learning. 2024, MNRAS, 527, 1, 739-755 [ads]
  9. J.C. Rose, P. Torrey, M. Vogelsberger, S. O’Neil. Unraveling the interplay between SIDM and baryons in MW halos: defining where baryons dictate heat transfer. 2023, MNRAS, 529, 5, 5623-5636 [ads]
  10. J. Borrow, M. Vogelsberger, S. O’Neil, M. McDonald, A. Smith. There and back again: understanding the critical properties of backsplash galaxies. 2023, MNRAS, 520, 1, 649-667 [ads]
  11. R. McKinnon, R. Kannan, M. Vogelsberger, S. O’Neil, P. Torrey, H. Li. Simulating dust grain-radiation coupling on a moving mesh. 2021, MNRAS, 502, 1, 1344-1354 [ads]
  12. M. Vogelsberger, R. McKinnon, S. O’Neil, F. Marinacci, P. Torrey, R. Kannan. Dust in and around galaxies: dust in cluster environments and its impact on cooling. 2019, MNRAS, 487, 4, 4870-4883 [ads]