Ana Ennis photo

Joint Postdoctoral Research Fellow - Perimeter/UW(Centre for Astrophysics)

Perimeter Institute for Theoretical Physics

Postdoctoral Researcher

Areas of research: Cosmology

https://sites.google.com/view/anaennis/home

Overview
Ana Ennis is a postdoctoral fellow at Perimeter Institute and University of Waterloo, working on the study of extragalactic globular cluster systems.
Research Interests
My main interest is galaxy formation and evolution seen through the study of discrete tracers. At large distances or at large galactocentric radii, where the stellar component of galaxies is too faint to measure, discrete tracers such as globular clusters and planetary nebulae are excellent tools for unveiling the properties of the underlying stellar population.
Positions Held
  • Doctoral Fellow, Centro Científico Tecnológico - La Plata, 2017-2023
Recent Publications
  • Yang, N., Hartke, J., Bureau, M., Spiniello, C., Guité, L. -S., Flint, G., . . . Vicens-Mouret, S. (2026). An automated method for planetary nebula detection with SIGNALS: first applications to NGC 4214 and NGC 4449. https://doi.org/10.1093/mnras/stag661
  • Ennis, A. I., Hartke, J., Bian, F., Pulsoni, C., Spiniello, C., Arnaboldi, M., & de Propris, R. (2025). Planetary nebulae as tracers of stellar population properties: a pilot study with MUSE. Monthly Notices of the Royal Astronomical Society, 545(2), staf2036. doi:10.1093/mnras/staf2036
  • Ennis, A. I., Hartke, J., Bian, F., Pulsoni, C., Spiniello, C., Arnaboldi, M., & Propris, R. D. (2025). Planetary nebulae as tracers of stellar population properties: a pilot study with MUSE. https://arxiv.org/abs/2511.11479v1
  • Ennis, A. I., Caso, J. P., & Bassino, L. P. (2024). Imprints of interaction processes in the globular cluster system of NGC 3640. The Open Journal of Astrophysics, 7. doi:10.33232/001c.124843
  • Ennis, A. I., Caso, J. P., & Bassino, L. P. (2024). Imprints of interaction processes in the globular cluster system of NGC 3640. https://arxiv.org/abs/2403.00065v2
  • Hartke, J., Arnaboldi, M., Gerhard, O., Ennis, A., Coccato, L., Cortesi, A., . . . Napolitano, N. (2023). Planetary nebulae populations in the haloes of nearby massive early-type galaxies. In Planetary Nebulae: a Universal Toolbox in the Era of Precision Astrophysics. Krakow, Poland. doi:10.48550/arXiv.2312.02587
  • Ennis, A., Hartke, J., Arnaboldi, M., Pulsoni, C., Bian, F., & Spiniello, C. (2023). Planetary nebulae as tracers of stellar population properties: unlocking their potential with integral-field spectroscopy. Krakow, Poland. doi:10.48550/arXiv.2311.09176
  • Hartke, J., Arnaboldi, M., Gerhard, O., Ennis, A. I., Pulsoni, C., Coccato, L., . . . Napolitano, N. (2023). Planetary nebulae populations in the haloes of nearby massive early-type galaxies. Proceedings of the International Astronomical Union, 19(S384), 109-121. doi:10.1017/s174392132300577x
  • Penger, S., Hartke, J., Arnaboldi, M., & Ennis, A. I. (2023). Exploring Planetary Nebulae in the dwarf galaxy VCC 1249 using MUSE data. Proceedings of the International Astronomical Union, 19(S384), 391-393. doi:10.1017/s1743921323005318
  • Ennis, A. I., Hartke, J., Arnaboldi, M., Pulsoni, C., Bian, F., & Spiniello, C. (2023). Planetary nebulae as tracers of stellar population properties: unlocking their potential with integral-field spectroscopy. Proceedings of the International Astronomical Union, 19(S384), 14-20. doi:10.1017/s1743921323005501
  • Caso, J. P., Ennis, A. I., & De Bórtoli, B. J. (2023). Scaling relations for globular cluster systems in early-type galaxies – III. The inner flattening of the radial distributions. Monthly Notices of the Royal Astronomical Society, 527(3), 6993-7004. doi:10.1093/mnras/stad3602
  • Ennis, A., Hartke, J., Arnaboldi, M., Pulsoni, C., Bian, F., & Spiniello, C. (2023). Planetary nebulae as tracers of stellar population properties: unlocking their potential with integral-field spectroscopy. https://arxiv.org/abs/2311.09176v1
  • Dage, K. C., Usher, C., Sobeck, J., Santos, A. L. C., Szabó, R., Reina-Campos, M., . . . Williams, B. F. (2023). Extragalactic Star Cluster Science with the Nancy Grace Roman Space Telescope's High Latitude Wide Area Survey and the Vera C. Rubin Observatory. https://arxiv.org/abs/2306.12620v1
  • Pulsoni, C., Gerhard, O., Fall, S. M., Arnaboldi, M., Ennis, A. I., Hartke, J., . . . Napolitano, N. R. (2023). The extended Planetary Nebula Spectrograph (ePN.S) early-type galaxy survey: The specific angular momentum of ETGs. Astronomy & Astrophysics, 674, a96. doi:10.1051/0004-6361/202346234
Seminars
  • Nebulosas planetarias como trazadoras de poblaciones estelares con MUSE, Instituto de Astronomía Teórica y Experimental, Cordoba, Cordoba, Argentina, 2026/03/13
  • Nebulosas planetarias como trazadoras de poblaciones estelares con MUSE, Universidad Nacional de La Plata, Facultad de Ciencias Astronomicas y Geofisicas, La Plata, Buenos Aires, Argentina, 2025/09/24
  • Extragalactic globular clusters in the era of large surveys, Globular Clusters and Their Tidal Tails: From the Milky Way to the Local Group, University of Toronto, Toronto, Canada, 2024/05/31
  • Extragalactic globular clusters in the era of large surveys, 4th Regional Extragalactic Astronomy Meeting: 60 Years Of The Sersic Law, Universidad Nacional de Córdoba, Facultad de Ciencias Exactas, Físicas y Naturales, Córdoba, Córdoba, Argentina, 2023/12/04
  • Discrete tracers, Journal Club, Universidad Nacional de La Plata UNLP, Facultad de Ciencias Astronomicas y Geofisicas de La Plata, Paseo del Bosque S/N, La Plata, Buenos Aires, Argentina, 2023/09/29
  • Planetary nebulae as tracers of stellar population properties: unlocking their potential with integral-field spectroscopy, IAU Symposium 384: Planetary Nebulae: a Universal Toolbox in the Era of Precision Astrophysics, 2023/09/04
  • Discrete tracers as keys to unlocking the evolutionary history of early-type galaxies, Lunch Talk Series, European Southern Observatory, Garching bei München, Germany, 2023/07/18
  • Anchoring the Planetary Nebulae population studies in the outskirts of galaxies with integral-field spectroscopy, European Astronomical Society, Marii Konopnickiej 17, Krakow, Poland, 2023/07/14, PIRSA:799
  • Discrete tracers as keys to unlocking the evolutionary history of early-type galaxies, Tuorla Seminar, University of Turku, Tuorla Observatory, Quantum, Vesilinnantie 5, Turku, FI-20014, Finland, 2023/07/06