Search Publications
A solar coronal loop in a box: Energy generation and heating
Peter, H.; Chitta, L. P.; Solanki, S. K. +4 more
Context. Coronal loops are the basic building block of the upper solar atmosphere as seen in the extreme UV and X-rays. Comprehending how these are energized, structured, and evolve is key to understanding stellar coronae.
Aims: Here we investigate how the energy to heat the loop is generated by photospheric magneto-convection, transported in…
New binaries from the SHINE survey
Moutou, C.; Rouan, D.; Avenhaus, H. +68 more
We present the multiple stellar systems observed within the SpHere INfrared survey for Exoplanet (SHINE). SHINE searched for sub-stellar companions to young stars using high contrast imaging. Although stars with known stellar companions within the SPHERE field of view (< 5.5 arcsec) were removed from the original target list, we detected additi…
Deep images of the Galactic center with GRAVITY
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +65 more
Stellar orbits at the Galactic Center provide a very clean probe of the gravitational potential of the supermassive black hole. They can be studied with unique precision, beyond the confusion limit of a single telescope, with the near-infrared interferometer GRAVITY. Imaging is essential to search the field for faint, unknown stars on short orbits…
A proper motion catalogue for the Milky Way's nuclear stellar disc
Nogueras-Lara, F.; Gallego-Calvente, A. T.; Gallego-Cano, E. +5 more
We present the results of a large-scale proper motion study of the central ∼36′ × 16′ of the Milky Way, based on our high angular resolution GALACTICNUCLEUS survey (epoch 2015) combined with the HST Paschen-α survey (epoch 2008). Our catalogue contains roughly 80 000 stars, an unprecedented kinematic dataset for this region. We describe the data a…
X-ray emission from cosmic web filaments in SRG/eROSITA data
Aghanim, N.; Douspis, M.; Malavasi, N. +1 more
Using the publicly available eROSITA Final Equatorial Depth Survey (eFEDS) data, we detected the stacked X-ray emissions at the position of 463 filaments at a significance of 3.8σ based on the combination of all energy bands. In parallel, we found that the probability of the measurement under the null hypothesis is ∼0.0017. The filaments were iden…
Detection of period-spacing patterns due to the gravity modes of rotating dwarfs in the TESS southern continuous viewing zone
Garcia, S.; De Ridder, J.; Aerts, C. +3 more
Context. The theory of stellar evolution presents shortcomings when confronted with asteroseismic probes of interior physical properties. The differences between observations and theory are often great because stellar models have mainly been calibrated from observables connected to the surface of stars. Period-spacing patterns caused by gravity mo…
A self-consistent dynamical model of the Milky Way disc adjusted to Gaia data
Figueras, F.; Reylé, C.; Mor, R. +6 more
Context. Accurate astrometry achieved by Gaia for many stars in the Milky Way provides an opportunity to reanalyse the Galactic stellar populations from a large and homogeneous sample and to revisit the Galaxy gravitational potential.
Aims: This paper shows how a self-consistent dynamical model can be obtained by fitting the gravitational pot…
Gaia EDR3 distances of the young stellar clusters in the extended Carina Nebula complex
Preibisch, T.; Göppl, C.
Context. The Carina Nebula complex (CNC) is one of the most massive and active star-forming regions in our Galaxy and it contains several large young star clusters. The distances of the individual clusters and their physical connection were poorly known up to now, with strongly discrepant results reported in the literature.
Aims: We want to d…
Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b
Bouchy, F.; Queloz, D.; Henning, T. +50 more
Context. Long-period transiting planets provide the opportunity to better understand the formation and evolution of planetary systems. Their atmospheric properties remain largely unaltered by tidal or radiative effects of the host star, and their orbital arrangement reflects a different and less extreme migrational history compared to close-in obj…
[Mg/Fe] ratios in the solar neighbourhood: Stellar yields and chemical evolution scenarios
Recio-Blanco, Alejandra; Matteucci, Francesca; Palla, Marco +1 more
Context. The [Mg/Fe] abundance ratios are a fundamental fossil signature used to trace the chemical evolution of the disc and to divide it into low-α and high-α populations. Despite the huge observational and theoretical efforts, discrepancies between models and data are still present and several explanations have been put forward to explain the […