Search Publications
Numerical studies on the link between radioisotopic signatures on Earth and the formation of the Local Bubble. II. Advanced modelling of interstellar 26Al, 53Mn, 60Fe, and 244Pu influxes as traces of past supernova activity in the solar neighbourhood
Schulreich, M. M.; Feige, J.; Breitschwerdt, D.
Context. Measurements of long-lived radioisotopes, which have grown rapidly in quantity and sensitivity over the last few years, provide a means, completely independent of other observational channels, to draw conclusions about near-Earth supernovae (SNe) and thus the origin of the Local Bubble (LB), our Galactic habitat. First and foremost in thi…
White dwarf spectral type-temperature distribution from Gaia DR3 and the Virtual Observatory
Solano, E.; Rebassa-Mansergas, A.; Raddi, R. +6 more
Context. The characterization of white dwarf atmospheres is crucial for accurately deriving stellar parameters such as effective temperature, mass, and age. However, the inclusion of physical processes such as convective mixing and convective dilution in current white dwarf atmospheric models offers a prediction of the spectral evolution of these …
Milky Way globular clusters on cosmological timescales. I. Evolution of the orbital parameters in time-varying potentials
Khoperskov, Sergey; Berczik, Peter; Ishchenko, Maryna +4 more
Context. Recent observational data show that the Milky Way galaxy contains about 170 globular clusters. A fraction of them is likely formed in dwarf galaxies that were accreted onto the Milky Way in the past, while the remaining clusters were formed in situ. Therefore, the different parameters, including the orbits, of the globular clusters are a …
Stellar variability in Gaia DR3. I. Three-band photometric dispersions for 145 million sources
Caballero, J. A.; Maíz Apellániz, J.; Holgado, G. +1 more
Context. The unparalleled characteristics of Gaia photometry in terms of calibration, stability, time span, dynamic range, full-sky coverage, and complementary information make it an excellent choice to study stellar variability.
Aims: We aim to measure the photometric dispersion in the G, GBP, and GRP bands of the 145 6…
A machine-learning-based tool for open cluster membership determination in Gaia DR3
Castro-Ginard, A.; Jordi, C.; Casamiquela, L. +2 more
Context. Membership studies characterising open clusters (OCs) with Gaia data - most of them using Gaia Data Release 2 (DR2) - have so far been limited at the faint end to magnitude G = 18 due to astrometric uncertainties.
Aims: Our goal is to extend current OC membership lists with faint members and to characterise the low-mass end. These lo…
TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and an eccentric cold Jupiter
Deleuil, M.; Stassun, K.; Gandolfi, D. +62 more
Context. The current architecture of a given multi-planetary system is a key fingerprint of its past formation and dynamical evolution history. Long-term follow-up observations are key to complete their picture.
Aims: In this paper, we focus on the confirmation and characterization of the components of the TOI-969 planetary system, where TESS…
Angular momentum transport by magnetic fields in main-sequence stars with Gamma Doradus pulsators
Eggenberger, P.; Salmon, S. J. A. J.; Ekström, S. +2 more
Context. Asteroseismic studies show that cores of post-main-sequence stars rotate more slowly than theoretically predicted by stellar models with purely hydrodynamical transport processes. Recent studies of main-sequence stars, particularly Gamma Doradus (γ Dor) stars, have revealed the internal rotation rates for hundreds of stars, offering a cou…
The Gaia-ESO Survey: Preparing the ground for 4MOST and WEAVE galactic surveys. Chemical evolution of lithium with machine learning
Gilmore, G.; Bayo, A.; Guiglion, G. +21 more
Context. With its origin coming from several sources (Big Bang, stars, cosmic rays) and given its strong depletion during its stellar lifetime, the lithium element is of great interest as its chemical evolution in the Milky Way is not well understood at present. To help constrain stellar and galactic chemical evolution models, numerous and precise…
PENELLOPE. IV. A comparison between optical forbidden lines and H2 UV lines in the Orion OB1b and σ-Ori associations
France, K.; Kóspál, Á.; Siwak, M. +17 more
Context. Observing the spatial distribution and excitation processes of atomic and molecular gas in the inner regions (<20 au) of young (<10 Myr) protoplanetary disks helps us to understand the conditions for the formation and evolution of planetary systems.
Aims: In the framework of the PENELLOPE and ULLYSES projects, we aim to charact…
Chronology of the chemical enrichment of the old Galactic stellar populations
Smiljanic, R.; Giribaldi, R. E.
Context. Over its history, the Milky Way has accreted several smaller satellite galaxies. These mergers added stars and gas to the Galaxy and affected the properties of the pre-existing stellar populations. Stellar chemical abundances and ages are needed to establish the chronological order of events that occur before, during, and after such merge…