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Research Interests

I am interested in a variety of topics, ranging from star formation to galactic dynamics. I am particularly interested in using both dynamical simulations and observations of stars in the Milky Way and nearby galaxies to gain insight into how galaxies form and evolve. My research work to date includes analyses of the stellar populations of ultra-faint dwarf galaxies, the dynamics of stars in barred galaxies, and preparations for the resolved-star component of the upcoming Subaru Prime Focus Spectrograph survey.

Education

Undergraduate

Bryn Mawr College, Bryn Mawr, PA USA

2015 - 2018, A.B. with Honors in Physics, graduated *Magna Cum Laude*

Undergraduate thesis work advised by Prof. Kate Daniel

Graduate

Johns Hopkins University, Baltimore, MD, USA

2018 - 2024, Ph.D. in Astronomy and Astrophysics

Dissertation work advised by Prof. Rosemary F.G. Wyse


Publication List

on ADS, ORCiD

  • First Author

    • "The Low-Mass Stellar Initial Mass Function in Nearby Ultra-Faint Dwarf Galaxies", Filion, C., Wyse, R.F.G., Richstein, H., Kallivayalil, N., van der Marel, R.P., Sacchi, E., 2024, ApJ, accepted
    • “The Non-Axisymmetric Influence: Radius and Angle-Dependent Trends in a Barred Galaxy”, Filion, C., McClure, R.L., Weinberg, M., D’Onghia, E., Daniel, K.J., 2023, MNRAS, 524, 276
    • “Faint Stars in a Faint Galaxy. II. the Low-Mass Stellar Initial Mass Function of the Boötes I Ultrafaint Dwarf Galaxy”, Filion, C., Platais, I., Wyse, R.F.G, Kozhurina-Platais, V., 2022, ApJ, 939, 38
    • “The Far-away Blues: Exploring the Furthest Extents of the Boötes I Ultra-faint Dwarf Galaxy”, Filion, C., Wyse, R.F.G, 2021, ApJ, 923, 218
    • “Faint Stars in a Faint Galaxy. I. Ultradeep Photometry of the Boötes I Ultrafaint Dwarf Galaxy”, Filion, C., Kozhurina-Platais, V., Avila, R., Platais, I., Wyse, R.F.G, 2020, ApJ, 901, 82

  • Nth Author

    • "Detection of a Spatially Extended Stellar Population in M33: A Shallow Stellar Halo?", Ogami, I., et al including Filion, C., 2024 submitted to ApJ
    • "Radial phase spirals in the Solar neighbourhood", Hunt, J., et al including Filion, C., 2024, MNRAS, 527, 4
    • "The structure of the stellar halo of the Andromeda galaxy explored with the NB515 for Subaru/HSC. I.: New Insights on the stellar halo up to 120 kpc", Ogami, I., et al including Filion, C., 2024, submitted to MNRAS
    • "RomAndromeda: The Roman Survey of the Andromeda Halo", Dey, A., Najita, J., Filion, C., et al., 2023, Roman White Paper on the arXiv
    • “Revealing Mass Distributions of Dwarf Spheroidal Galaxies in the Subaru-PFS Era”, Hayashi, K., Dobos, L., Filion, C., Kirby, E., et al., 2023, Accepted for publication in the Proceedings of the IAUS 379

Additional Info

Collaborations

Beyond Basis Function Expansion (B-BFE) - *link coming soon*

Subaru Prime Focus Spectrograph (PFS) Collaboration

Mad Astro Dynamics Research Group


Awards and Grants

American Physical Society Women in Physics Group Grants, 2023 *

American Astronomical Society International Travel Grant, 2022

NASA FINESST Grant, 2020

Alumni Association Student Grant *

* - successful grant proposal that I led on behalf of a service-oriented group


Observing Proposals

Prime Focus Spectrograph Subaru Strategic Program (PFS SSP), In preparation , CO-I on a proposed a 365-night survey to be conducted on the Subaru PFS.

Cool Subdwarfs in the Galactic Halo, Submitted , CO-I on a program to observe candidate cool subdwarfs in the Milky Way stellar halo using unfilled fibers on the Subaru PFS

Deciphering the Outer Halo of the Galaxy with Blue Horizontal Branch Stars, Submitted , CO-I on a program to observe candidate blue horizontal branch stars using unfilled fibers on the Subaru PFS

The ZERO survey - Search for zero-metal stars in the Galaxy with HSC/NB395, Successful , CO-I on a program requesting 2.5 nights on Subaru’s Hyper Suprime-Cam in 2021/2022