Marianne Vestergaard

Marianne Vestergaard is a Professor at the Niels Bohr Institute, University of Copenhagen, specifically affiliated with the Dark Cosmology Centre (DARK). She has been a faculty member since returning to the University of Copenhagen in 2009 as a Freja Fellow. Her research focuses on distant, young galaxies called quasars, particularly studying the physics of supermassive black holes at their centers.

Dr. Vestergaard earned her PhD in Astrophysics from the Niels Bohr Institute in 1999 with a dissertation titled "Are Radio-loud Quasars Rebellious or Are Radio-quiets Just Plain Untalented? A Study of the Ultraviolet Broad Emission Line Profiles in High-Redshift Radio-loud and Radio-quiet Quasars." Prior to her PhD, she completed her Master of Science at the University of Copenhagen in 1992. She conducted research at the Harvard-Smithsonian Center for Astrophysics during her PhD studies and subsequently worked at Ohio State University, University of Arizona, and Tufts University before returning to Copenhagen.

Marianne Vestergaard's primary research interest is in the physics of distant, young galaxies called quasars. These objects emit powerful radiation due to material falling onto supermassive black holes at the centers of galaxies. She specializes in determining the mass of these black holes and investigating how the powerful energy emission from the central active nucleus affects their surroundings. Her work employs a wide array of telescopes both in space and on Earth, sensitive to X-ray, ultraviolet, visible, infrared, sub-millimeter and radio radiation. Recently, she has utilized data from the Very Large Telescope at the European Southern Observatory in Chile, Atacama Pathfinder Experiment (APEX), Atacama Large Millimeter Array (ALMA), Hubble Space Telescope, and Swift X-ray and UV-optical telescope.

Analysis of Dr. Vestergaard's recent publications (2024-2025) reveals a strong focus on active galactic nuclei (AGN) physics, particularly through the AGN STORM 2 project. Her work examines accretion disk dynamics, black hole mass measurements, reverberation mapping techniques, and the relationship between central black holes and their host galaxies. She frequently collaborates on multi-wavelength observational campaigns, combining data from X-ray through radio wavelengths to build comprehensive models of AGN structure and behavior. A significant portion of her recent work involves studying specific AGN like Mrk 817 and NGC 7469 to understand accretion physics in detail.

• Året Harald (2016)
• KIF (Women in Physics) Honorary Award (2024)
• Jens Martin Prisen (2015)

Dr. Vestergaard has been actively involved in numerous international collaborations and research projects throughout her career. Her work has generated significant interest in the scientific community, with her publications being referenced by multiple news outlets, blogged about, and shared across social media platforms. She has participated in public outreach activities, giving lectures at institutions like Folkeuniversitetet in Aarhus and Copenhagen on topics including "Giant black holes, quasars and baby galaxies." Her research has been featured in media outlets such as Videnskabernes Verden ("World of the Sciences").

As a member of the Dark Cosmology Centre at the Niels Bohr Institute, Dr. Vestergaard is part of a research environment dedicated to understanding the dark components of the universe - dark matter and dark energy. The center combines observational, theoretical, and computational approaches to cosmological research, with particular strengths in high-redshift astronomy, galaxy formation and evolution, and the physics of active galactic nuclei.