→
Lisa Bugnet's Homepage
Welcome! I am Lisa Bugnet, an astrophysicist working on the internal dynamics and evolution of stars, using asteroseismology to probe stellar interiors. My research focuses on understanding how physical processes such as internal rotation, magnetic fields, and angular momentum transport affect the evolution of stars, with a particular emphasis on intermediate-mass stars. By interpreting stellar oscillations, I place new constraints on stellar physics that cannot be accessed through surface observations alone.
My ERC Starting Grant project, Calcifer, is dedicated to advancing our understanding of the role of large-scale internal magnetic fields in stellar evolution through magnetoasteroseismology. Recent discoveries have revealed that stable magnetic fields can exist deep within the radiative cores of red giant stars — regions that are hidden from view yet fundamental to a star’s internal dynamics. Traditional stellar evolution models largely neglect these magnetic fields, leading to systematic uncertainties in age estimates and evolutionary pathways for stars like our Sun. By building the first coherent, physically anchored framework for the magnetic evolution of stars, the project aims to revise basic assumptions in stellar physics and improve age diagnostics not only for individual stars but also for stellar populations and galactic archaeology. The funding also supports the growth of a multidisciplinary team covering young stars, evolved giants, and compact remnants, fostering a unified view of magnetism across stellar lifecycles.
I began my academic journey with a Ph.D. in Astronomy & Astrophysics from the French Alternative Energies and Atomic Energy Commission (CEA) and Paris-Cité University in 2020, where I focused on stellar structure and dynamics through asteroseismology. I was a Flatiron Research Fellow at the Center for Computational Astrophysics of the Flatiron Institute in New York (2020–2022). In 2023, I joined the Institute of Science and Technology Austria (ISTA) as the first Assistant Professor in Astronomy, where I established the Asterics research group. I am Associate Editor for Astronomy & Astrophysics since January 2026.
29. Sep. 2026
Magnetic signatures in Merger products
Published in Astronomy and Astrophysics: A&A, 715, A45 (2026)
17. Juli 2026
Constraining the model-based uncertainties of asteroseismic magnetic field measurements in red giants
Published in Astronomy and Astrophysics: A&A, 713, A294 (2026)
14. Apr. 2026
Magneto-Archeology of White Dwarfs. Revisiting the fossil field scenario with observational constraints during the red giant branch
Published in Astronomy and Astrophysics | Letter to the Editor: A&A 708, L14 (2026)
17. März 2026
Near-degeneracy effects in Quadrupolar Mixed Modes. From an Asymptotic Description to Data Fitting.
Published in Astronomy and Astrophysics: A&A, 707, A321 (2026)
2. Juli 2025
Exploring the probing power of γ-Dor’s inertial dip for core magnetism: case of a toroidal field
Published in Astronomy and Astrophysics: A&A, 701, A253 (2025)
18. Feb. 2025
Constraining differential rotation in gamma Doradus stars from inertial dips properties
Published in Astronomy and Astronphysics: A&A 694, A225 (2025)
11. Juli 2024
Unveiling complex magnetic field configurations in red giant stars
Published in Astronomy and Astrophysics: A&A, 690, A217 (2024)
29. Apr. 2024
Detectability of axisymmetric magnetic fields from the core to the surface of oscillating post-main sequence stars
Published in the Astrophysical Journal: ApJ 970 42 (2024)
16. Nov. 2022
Mode Mixing and Rotational Splittings. I. Near-degeneracy Effects Revisited
Published in The Astrophysical Journal: ApJ 940 18 (2022)
1. Aug. 2023
Magnetic Activity Evolution of Solar-like Stars. I. S ph-Age Relation Derived from Kepler Observations
Published in the Astrophysical Journal: ApJ 952 131 (2023)
24. Aug. 2022
Magnetic signatures on mixed-mode frequencies. II. Period spacings as a probe of the internal magnetism of red giants
Published in Astronomy and Astrophysics:
10. Aug. 2023
Asymmetries of frequency splittings of dipolar mixed modes: a window on the topology of deep magnetic fields
Published in Astronomy and Astrophysics | Letter to the Editor: A&A 676, L9 (2023)
