Education
PhD in Astronomy, 2019, The Ohio State University
Masters in Astronomy, 2015, The Ohio State University
BS in Physics 2013, California Institute of Technology
Positions
Institute for Theory and Computation Fellow, 2026-present, Center for Astrophysics | Harvard & Smithsonian
NASA Hubble Fellow, 2023-2026, Center for Astrophysics | Harvard & Smithsonian
Postdoctoral Researcher, 2019-2023, Space Telescope Science Institute
Student Fellow, 2018, Kavli Summer Program in Astrophysics, Center for Computational Astrophysics, Flatiron Institute
First Author Publications
Lochhaas, Cassandra; Peeples, Molly S.; O'Shea, Brian W.; et al., "Figuring Out Gas & Galaxies In Enzo (FOGGIE) XI: Circumgalactic O VI Emission Traces Clumpy Inflowing Recycled Gas", 2026, ApJ 1000, 104
Lochhaas, Cassandra; Tumlinson, Jason; Peeples, Molly S.; et al., "Figuring Out Gas & Galaxies in Enzo (FOGGIE) VI: The Circumgalactic Medium of L* Galaxies is Supported in an Emergent, Non-Hydrostatic Equilibrium", 2023, ApJ 948, 43
Lochhaas, Cassandra; Tumlinson, Jason; O'Shea, Brian W.; et al., "Figuring Out Gas & Galaxies in Enzo (FOGGIE) V: The Virial Temperature Does Not Describe Gas in a Virialized Halo", 2021, ApJ 922, 121
Lochhaas, Cassandra; Thompson, Todd A.; Schneider, Evan E., "The Characteristic Momentum of Radiatively Cooling Energy-Driven Galactic Winds", 2021, MNRAS, 504, 3412
Lochhaas, Cassandra; Bryan, Greg L.; Li, Yuan; et al., "Properties of the Simulated Circumgalactic Medium", 2020, MNRAS 493, 1461
Lochhaas, Cassandra; Mathur, Smita; Frank, Stephan; et al., "A High Signal-to-Noise HST Spectrum Toward J1009+0713: Precise Absorption Measurements in the CGM of Two Galaxies", 2019, MNRAS, 489, 78
Lochhaas, Cassandra; Thompson, Todd A.; Quataert, Eliot; Weinberg, David H., "Fast Winds Drive Slow Shells: A Model for the Circumgalactic Medium as Galactic Wind-Driven Bubbles", 2018, MNRAS, 481, 1873
Lochhaas, Cassandra; Thompson, Todd A., "Second Generation Stars in Globular Clusters from Rapid Radiative Cooling of Pre-Supernova Massive Star Winds", 2017, MNRAS, 470, 977
Short summary video
Lochhaas, Cassandra; Weinberg, David H.; Peirani, Sébastien; et al., "Modeling Lyman-α Forest Cross-Correlations with LyMAS", 2016, MNRAS, 461, 4353
Short summary video
Student-led Publications
Bouchereau, Helena; Lochhaas, Cassandra; Bennett, Jake S.; Chen, Mandy C., "Measuring Simulated Circumgalactic Medium Turbulence with Emission-Weighted Projected Velocity Structure Functions in FOGGIE", 2026, submitted to ApJ, arXiv:2608.17013
Substantial Contribution Publications
Ticoras, Mackenzie; O'Shea, Brian W.; Kopenhafer, Claire; Lochhaas, Cassandra; et al., "Figuring Out Gas & Galaxies in Enzo (FOGGIE). XV. Examining the Spatial and Kinematic Relationship between Circumgalactic Mg II and O VI", 2026, ApJ, 1004, 159
Saeedzadeh, Vida; Tumlinson, Jason; Peeples, Molly S.; O'Shea, Brian W.; Lochhaas, Cassandra; et al., "Figuring Out Gas & Galaxies In Enzo (FOGGIE). XIV. The Observability of Emission from Accretion and Feedback in the Circumgalactic Medium with Current and Future Instruments", 2026, ApJ, 1004, 9
Trapp, Cameron W.; Peeples, Molly S.; Tumlinson, Jason; O'Shea, Brian W.; Lochhaas, Cassandra; et al., "FOGGIE: Figuring Out Gas and Galaxies In Enzo. XII. The Formation and Evolution of Extended H I Galactic Disks and Warps with a Dynamic Circumgalactic Medium", 2026, ApJ, 1003, 186
Silich, Emily M.; ZuHone, John; Bellomi, Elena; et al. (including Cassandra Lochhaas), "X-ray emission signatures of galactic feedback in the hot circumgalactic medium: predictions from cosmological hydrodynamical simulations", 2025, ApJ, 993, 125
Witt, Emily M.; Fleming, Brian T.; McCandliss, Stephan; et al. (including Cassandra Lochhaas), "The Juniper CubeSat concept: mission overview", 2025, SPIE 13625
Augustin, Ramona; Tumlinson, Jason; Peeples, Molly S.; O'Shea, Brian W.; Smith, Britton D.; Lochhaas, Cassandra; et al., "FOGGIE X: Characterizing the Small-Scale Structure of the CGM and its Imprint on Observables", 2025, ApJ, 993, 52
Simons, Raymond C.; Peeples, Molly S.; Tumlinson, Jason; O'Shea, Brian W.; Lochhaas, Cassandra; et al., "Figuring Out Gas & Galaxies in Enzo (FOGGIE). IX: The Angular Momentum Evolution of Milky Way-like Galaxies and their Circumgalactic Gas", 2025, ApJ, 988, 250
Acharyya, Ayan; Peeples, Molly S.; Tumlinson, Jason; O'Shea, Brian W.; Lochhaas, Cassandra; et al., "Figuring Out Gas and Galaxies In Enzo (FOGGIE). VIII. Complex and Stochastic Metallicity Gradients at z > 2", 2025, ApJ, 979, 129
Coil, Alison L.; Perrotta, Serena; Rupke, David S. N.; Lochhaas, Cassandra; et al., "Detection of Spatially Extended Ionized Gas in an Odd Radio Circle", 2024, Nature, 625, 459
Wright, Anna C.; Tumlinson, Jason; Peeples, Molly S.; O'Shea, Brian W.; Lochhaas, Cassandra; et al., "Figuring Out Gas & Galaxies In Enzo (FOGGIE) VII: The (Dis)Assembly of Stellar Halos", 2024, ApJ, 970, 70
Lee, Hyeonmin; Acharyya, Ayan; Wright, Anna C.; Augustin, Ramona; Lochhaas, Cassandra; et al., "Evolution of Galaxy Size in the FOGGIE Simulations", 2023, RNAAS 7, 202
Simons, Raymond C.; Peeples, Molly S.; Tumlinson, Jason; et al. (with Cassandra Lochhaas), "Figuring Out Gas & Galaxies In Enzo (FOGGIE). IV. The Stochasticity of Ram Pressure Stripping in Galactic Halos", 2020, ApJ 905, 167
Zheng, Yong; Peeples, Molly S.; O'Shea, Brian W.; et al. (with Cassandra Lochhaas), "Figuring Out Gas & Galaxies in Enzo (FOGGIE). III. The Mocky Way: Investigating Biases in Observing the Milky Way's Circumgalactic Medium", 2020, ApJ 896, 143
Li, Yuan; Gendron-Marsolais, Marie-Lou; Zhuravleva, Irina; et al. (with Cassandra Lochhaas), "Direct Detection of Black Hole-driven Turbulence in the Centers of Galaxy Clusters", 2020, ApJL 889, 1
Other Publications
Bennett, Jake S.; Smith, Aaron; Arrigoni-Battaia, Fabrizio; et al. (including Cassandra Lochhaas) "The birth of the intracluster medium: the evolution of multiphase gas and Lyman-alpha haloes in a simulated z~3 protocluster", 2026, OJAp 9, 65188
Coil, Alison L.; Rupke, David S. N.; Perrotta, Serena; et al. (including Cassandra Lochhaas) "A Shocked Wind Interpretation of an Odd Radio Circle", 2026, ApJ 1003, 24
Horne, Keith; De Rosa, G.; Peterson, B. M., and 154 additional authors incl. Cassandra Lochhaas, "Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548", 2021, ApJ 907, 176
Williams, P. R.; Pancoast, A.; Treu, T., and 155 additional authors incl. Cassandra Lochhaas, "Space Telescope and Optical Reverberation Mapping Project. XII. Broad-Line Region Modeling of NGC 5548", 2020, ApJ 902, 74
Kriss, G. A.; De Rosa, G.; Ely, J., and 168 additional authors incl. Cassandra Lochhaas, "Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum", 2019, ApJ 881, 153
De Rosa, G.; Fausnaugh, M. M.; Grier, C. J., and 103 additional authors incl. Cassandra Lochhaas, "Velocity-resolved Reverberation Mapping of Five Bright Seyfert 1 Galaxies", 2018, ApJ 866, 133
Fausnaugh, M. M.; Starkey, D. A.; Horne, Keith, and 74 additional authors incl. Cassandra Lochhaas, "Continuum Reverberation Mapping of the Accretion Disks in Two Seyfert 1 Galaxies", 2018, ApJ 854, 107
Fausnaugh, M. M.; Grier, C. J.; Bentz, M. C., and 74 additional authors incl. Cassandra Lochhaas, "Reverberation Mapping of Optical Emission Lines in Five Active Galaxies", 2017, ApJ 840, 97
Pei, L.; Fausnaugh, M. M.; Barth, A. J., and 157 additional authors incl. Cassandra Lochhaas, "Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548", 2017, ApJ 837, 131
