Madeline Marshall


Roles and responsibilities

Astronomer, focusing on research of supermassive black holes and galaxies in the early Universe.

Current research and/or projects

Investigating the formation and growth of galaxies and supermassive black holes with simulations and observations.

Unveiling Stellar Light from the First Quasars (PI): A James Webb Space Telescope (JWST) program aiming to make the first detections of the stars in the host galaxies of z~6 quasars.

PEARLS (Team Member): A Guaranteed Time JWST program studying the epoch of galaxy assembly by observing a range of fields with NIRCam and NIRSpec.

NIRSpec IFS Galaxy Assembly (Team Associate): A Guaranteed Time JWST program studying galaxy and black hole growth with NIRSpec Integral Field Spectroscopy (IFS).



  • Ph.D. (Astrophysics), University of Melbourne, Australia, 2021
  • B.Sc. (Hons.) Physics, University of Tasmania, Australia, 2016


  • Canadian Astronomical Society (CASCA)
  • Astronomical Society of Australia (ASA)
  • ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)


  • Plaskett Fellowship, NRC Herzberg Astronomy & Astrophysics, 2021-current

Key publications

Marshall, M. A., Ni, Y., Di Matteo, T., Wyithe, J. S. B., Wilkins, S., and Croft R. A. C: 2020, “The host galaxies of z=7 quasars: predictions from the BlueTides simulation.” MNRAS 499, 3, 3819 DOI: 10.1093/mnras/staa2982

Marshall, M. A., Shabala, S. S., Krause, M. G. H., Pimbblet, K. A., Croton, D. J., and Owers, M. S.: 2018, “Triggering active galactic nuclei in galaxy clusters.” MNRAS 474, 3615. 10.1093/mnras/stx2996

Marshall, M. A., Mutch, S. J., Qin, Y., Poole, G. B., and Wyithe, J. S. B.: 2020, “Dark-ages reionization and galaxy formation simulation - XVIII. The high-redshift evolution of black holes and their host galaxies.” MNRAS 494, 2747. DOI:10.1093/mnras/staa936

Marshall, M. A., Mutch, S. J., Qin, Y., Poole, G. B., and Wyithe, J. S. B.: 2019, “Dark-ages Reionization and Galaxy Formation Simulation – XVII. Sizes, angular momenta and morphologies of high redshift galaxies.” MNRAS 488, 1941. 10.1093/mnras/stz1810

Marshall, M. A., Mechtley, M., Windhorst, R. A., Cohen, S. H., Jansen, R. A., Jiang L., Jones, V. R., Wyithe, J. S. B., Fan, X., Hathi, N. P., Jahnke, K., Keel, W. C., Koekemoer, A. M., Marian, V., Ren, K., Robinson, J., Röttgering, H. J. A., Ryan, Jr., R. E., Scannapieco, E., Schneider, D. P., Schneider, G., Smith, B. M., and Yan, H.: 2020, “Limits to Rest-Frame Ultraviolet Emission From Far-Infrared-Luminous z~6 Quasar Hosts.” ApJ 900, 21. DOI:10.3847/1538-4357/abaa4c

Marshall, M. A., Wyithe, J. S. B., Windhorst, R. A., Di Matteo, T., Ni, Y., Wilkins, S., Croft, R. A. C., and Mechtley, M.: 2021, “Observing the host galaxies of high-redshift quasars with JWST: predictions from the BlueTides simulation” MNRAS 506, 1, 1209 DOI: 10.1093/mnras/stab1763

Madeline Marshall

Madeline Marshall

Assistant Research Officer
Herzberg Astronomy and Astrophysics
5071 West Saanich Road
Victoria, British Columbia V9E 2E7
Preferred language: English


Space sciences, Astronomy, Observational astronomy