Search Publications
Multi-spacecraft study with the Icarus model: Modelling the propagation of CMEs to Mercury and Earth
Schmieder, B.; Poedts, S.; Démoulin, P. +2 more
Context. Coronal mass ejections (CMEs) are the main drivers of the disturbances in interplanetary space. Earth-directed CMEs can be dangerous, and understanding the CME interior magnetic structure is crucial for advancing space weather studies. It is important to assess the capabilities of a numerical heliospheric model, as a firm understanding of…
Lithium, rotation and metallicity in the open cluster M35
Bouy, H.; Barrado, D.; Agüeros, M. A. +2 more
Context. Lithium (Li) abundance is an age indicator for G, K, and M stellar types, as its abundance decreases over time for these spectral types. However, despite all of the observational efforts made over the past few decades, the role of rotation, stellar activity, and metallicity in the depletion of Li is still unclear.
Aims: Our purpose i…
Stellar halo density with LAMOST K and M giants
Wang, H. -F.; López-Corredoira, M.; Liu, C. +3 more
Aims: We derive the morphology of the stellar component in the outer halo volume, and search for possible overdensities due to substructures therein.
Methods: We made use of some of the data releases of the spectroscopic survey LAMOST DR8-DR9 in tandem with distance determinations for two subsamples, that is, of K-giants and M-giants, re…
Properties of flare events based on light curves from the TESS survey: II. 20-second cadence
Zhang, Liyun; Han, Xianming L.; Misra, Prabhakar +2 more
Aims. Stellar flares are sudden bursts of energy and are the result of magnetic activity. We used light curves from the TESS 20-second cadence survey from 2020 to 2023 to detect flare events and determine their properties. Methods. By means of repeated fitting to distinguish stellar background light curves and flare events, we detected 32 978 flar…
A halo model approach to describe clustering and emission of the two main star-forming galaxy populations for cosmic infrared background studies
Calabrese, E.; Pagano, L.; Negrello, M. +3 more
The cosmic infrared background (CIB), which is traced by the emission from dusty star-forming galaxies, provides a crucial window into the phases of star formation throughout cosmic history. These galaxies, although challenging to detect individually at high redshifts due to their faintness, cumulatively contribute to the CIB, which then becomes a…
J-PLUS: The fraction of calcium white dwarfs along the cooling sequence
Hernández-Monteagudo, C.; Hernán-Caballero, A.; Gänsicke, B. T. +24 more
Aims. We used the Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2) photometry in 12 optical bands over 2176 deg2 to estimate the fraction of white dwarfs with the presence of Ca II H+K absorption along the cooling sequence. Methods. We compared the J-PLUS photometry against metal-free theoretical models to…
Gaia DR3 reveals the complex dynamical evolution within star clusters
Miret-Roig, N.; Randich, S.; Alves, J. +6 more
Context. Star clusters, composed of stars born from the same molecular cloud, serve as invaluable natural laboratories for understanding the fundamental processes governing stellar formation and evolution. Aims. This study aims to investigate correlations between the Mean Interdistance (
Compositional characterization of a primordial S-type asteroid family of the inner main belt
Fornasier, S.; Delbo, M.; Ochner, P. +4 more
Context. Recently, a primordial family of moderate-albedo asteroid fragments was discovered in the inner main belt. Its age was estimated to be 4.4 ± 1.7 Gyr. However, there is a lack of compositional characterization, which is important to the study of the earliest collisions in the main belt.
Aims: In addition to the previously identified m…
The interplay between disk wind and magnetospheric accretion mechanisms in the innermost environment of RU Lup
Labadie, L.; Dougados, C.; Bouvier, J. +10 more
Context. Hydrogen recombination lines such as Brγ are tracers of hot gas within the inner circumstellar disk of young stellar objects (YSOs). In the relatively cool innermost environment of T Tauri stars specifically, Brγ emission is closely associated with magnetically driven processes, such as magnetospheric accretion. Magnetospheric emission al…
Neutron-capture elements in a sample of field metal-poor N-rich dwarfs
Bonifacio, P.; Caffau, E.; Spite, M. +1 more
Context. The aim of this work is to measure the abundances of n-capture elements in a sample of six metal-poor N-rich dwarfs that were formed in globular clusters, and subsequently became unbound from the cluster. These N-rich stars, HD 25329, HD 74000, HD 160617, G 24-3, G53-41, and G90-3, were previously studied in Paper I.
Aims: The abunda…