Published in Astronomy & Astrophysics, 2025
I led this high-precision study of the only old red giant hosting eclipsing binary with high enough asteroseismic data quality to validate the stellar mass against eclipsing binary analysis at the 1.4% level. We managed to obtain a 6% agreement on the age, and thereby affirm the use of precise asteroseismology for Galactic Archaeology.
Published in Astronomy & Astrophysics, 2025
Alessandro Mazzi led this work, where he performed stellar population synthesis of the Kepler space mission field. We used this to derive expected asteroseismic binary fractions as a function of evolutionary stage, including the impact of binary interaction.
Published in Monthly Notices of the Royal Astronomical Society, 2022
I performed a re-analysis of the eclipsing binary KIC8430105 hosting an oscillating red giant with new high precision radial velocity measurements, with a significant change in mass and radius measurements over previous analyses, as well as a large improvement in precision. We supplemented this with new spectroscopic and asteroseismic analyses, and compared the eclipsing binary measurements directly with asteroseismic scaling relations.
Published in Astronomy & Astrophysics, 2024
Karsten Brogaard led this work, where we used a catalogue of measurements of stellar masses obtained with asteroseismology together with survey spectroscopy (APOGEE DR17), parallaxes (Gaia DR3), and photometry (2MASS), in order to derive integrated mass loss rates of the of the Milky Way thick disk stars. This was done by comparing the masses of RGB stars (hydrogen-shell burning) to that of the more evolved core-Helium burning stars.
Published in Astronomy & Astrophysics, 2024
Valeria Grisoni led this study, where we used precise asteroseismic ages together with detailed survey kinematics and spectroscopy to explore a flag of seemingly young (massive) stars within the old population of Milky Way disk stars. We found that their occurence rates and general properties suggest that they are products of binary mergers or mass accretion, rather than being genuinely young stars.
Published in Astronomy & Astrophysics, 2023
Karsten Brogaard led this study, where we used oscillating red giants in the open cluster NGC 6866 to determine the RGB mass of the cluster and constrain convective-core overshoot, and thereby obtain a precise measure of the cluster age.
Published in The Planetary Science Journal, 2023
Davide Farnocchia led this study to determine the timing performance of asteroid warning networks using the asteroid 2005 LW3. I participated as the observer at the Nordic Optical Telescope.
Published in Monthly Notices of the Royal Astronomical Society: Letters, 2023
Jooyeon Geem led this work to characterize the spectral type and geometric albedo of the asteroid 2001 CC21 using polarimetry. I participated in the observing effort at the Nordic Optical Telescope.
Published in GRB Coordinates Network, 2022
We performed optical observations of the gamma-ray burst GRB 220623A with the Nordic Optical Telescope.