M. Van der Swaelmen
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View article: Spectroscopic binaries in Gaia-ESO, Gaia and 4MOST surveys
Spectroscopic binaries in Gaia-ESO, Gaia and 4MOST surveys Open
info:eu-repo/semantics/published
View article: Inferring stellar parameters and their uncertainties from high-resolution spectroscopy using invertible neural networks
Inferring stellar parameters and their uncertainties from high-resolution spectroscopy using invertible neural networks Open
Context . New spectroscopic surveys will increase the number of astronomical objects in need of characterisation by more than an order of magnitude. Machine learning tools are required to address this data deluge in a fast and accurate fas…
View article: The <i>Gaia</i>-ESO survey: New spectroscopic binaries in the Milky Way
The <i>Gaia</i>-ESO survey: New spectroscopic binaries in the Milky Way Open
Context . The Gaia -ESO survey (GES) is a large public spectroscopic survey that acquired spectra for more than 100 000 stars across all major components of the Milky Way. In addition to atmospheric parameters and stellar abundances that h…
View article: Appendices: The Gaia-ESO Survey: new spectroscopic binaries in the Milky Way
Appendices: The Gaia-ESO Survey: new spectroscopic binaries in the Milky Way Open
The Gaia-ESO Survey (GES) is a large public spectroscopic survey which acquired spectra for more than 100000 stars across all major components of the Milky Way. In addition to atmospheric parameters and stellar abundances that have been de…
View article: The<i>Gaia</i>-ESO Survey DR5.1 and<i>Gaia</i>DR3 GSP-Spec: a comparative analysis
The<i>Gaia</i>-ESO Survey DR5.1 and<i>Gaia</i>DR3 GSP-Spec: a comparative analysis Open
Context. The third data release of Gaia, has provided stellar parameters, metallicity [M/H], [ α /Fe], individual abundances, broadening parameter from its Radial Velocity Spectrograph (RVS) spectra for about 5.6 million objects thanks to …
View article: Ariel stellar characterisation
Ariel stellar characterisation Open
Context . One of the ultimate goals of the ESA Ariel space mission is to shed light on the formation pathways and evolution of planetary systems in the Solar neighbourhood. Stellar elemental abundances are the cipher key to decode planetar…
View article: HRMOS White Paper: Science Motivation
HRMOS White Paper: Science Motivation Open
The High-Resolution Multi-Object Spectrograph (HRMOS) is a facility instrument that we plan to propose for the Very Large Telescope (VLT) of the European Southern Observatory (ESO), following the initial presentation at the VLT 2030 worksh…
View article: MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy
MELCHIORS: The Mercator Library of High Resolution Stellar Spectroscopy Open
Over the past decades, libraries of stellar spectra have been used in a large variety of science cases, including as sources of reference spectra for a given object or a given spectral type. Despite the existence of large libraries and the…
View article: MELCHIORS
MELCHIORS Open
Aims . Over the past decades, libraries of stellar spectra have been used in a large variety of science cases, including as sources of reference spectra for a given object or a given spectral type. Despite the existence of large libraries …
View article: The role of radial migration in open cluster and field star populations with<i>Gaia</i>DR3
The role of radial migration in open cluster and field star populations with<i>Gaia</i>DR3 Open
Context. The survival time of a star cluster depends on its total mass, density, and thus size, as well as on the environment in which it was born and in which lies. Its dynamical evolution is influenced by various factors such as gravitat…
View article: The role of radial migration in open cluster and field star populations with Gaia dr3
The role of radial migration in open cluster and field star populations with Gaia dr3 Open
The survival time of a star cluster depends on its total mass, density, and thus size, as well as on the environment in which it was born and in which lies. Its dynamical evolution is influenced by various factors such as gravitational eff…
View article: The <i>Gaia</i>-ESO Survey: Homogenisation of stellar parameters and elemental abundances
The <i>Gaia</i>-ESO Survey: Homogenisation of stellar parameters and elemental abundances Open
The Gaia -ESO Survey is a public spectroscopic survey that targeted ≳10 5 stars covering all major components of the Milky Way from the end of 2011 to 2018, delivering its final public release in May 2022. Unlike other spectroscopic survey…
View article: The Gaia-ESO Survey: homogenisation of stellar parameters and elemental abundances
The Gaia-ESO Survey: homogenisation of stellar parameters and elemental abundances Open
The Gaia-ESO Survey is a public spectroscopic survey that has targeted $\gtrsim10^5$ stars covering all major components of the Milky Way from the end of 2011 to 2018, delivering its public final release in May 2022. Unlike other spectrosc…
View article: The <i>Gaia</i>-ESO survey: Placing constraints on the origin of <i>r</i>-process elements
The <i>Gaia</i>-ESO survey: Placing constraints on the origin of <i>r</i>-process elements Open
Context. A renewed interest in the origin of r -process elements has been stimulated by the multi-messenger observation of the gravitational event GW170817, with the detection of both gravitational waves and electromagnetic waves correspon…
View article: The <i>Gaia</i>-ESO survey: Mapping the shape and evolution of the radial abundance gradients with open clusters
The <i>Gaia</i>-ESO survey: Mapping the shape and evolution of the radial abundance gradients with open clusters Open
Context. The spatial distribution of elemental abundances and their time evolution are among the major constraints to disentangling the scenarios of formation and evolution of the Galaxy. Aims. In this paper we used the sample of open clus…
View article: The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products Open
The Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to obtain astrophysical parameters and elemental abundances for 100,000 stars, including large representative samples of the stellar populations in the Galaxy, and a…
View article: The <i>Gaia</i>-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
The <i>Gaia</i>-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products Open
Context. The Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to obtain astrophysical parameters and elemental abundances for 100 000 stars, including large representative samples of the stellar populations in the Gala…
View article: The Gaia-ESO survey: placing constraints on the origin of r-process elements
The Gaia-ESO survey: placing constraints on the origin of r-process elements Open
A renewed interest about the origin of \emph{r}-process elements has been stimulated by the multi-messenger observation of the gravitational event GW170817, with the detection of both gravitational waves and electromagnetic waves correspon…
View article: The <i>Gaia</i>-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy
The <i>Gaia</i>-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy Open
Context. In the last 15 years different ground-based spectroscopic surveys have been started (and completed) with the general aim of delivering stellar parameters and elemental abundances for large samples of Galactic stars, complementing …
View article: Ariel stellar characterisation
Ariel stellar characterisation Open
Context. In 2020 the European Space Agency selected Ariel as the next mission to join the space fleet of observatories to study planets outside our Solar System. Ariel will be devoted to the characterisation of 1000 planetary atmospheres i…
View article: The <i>Gaia</i>-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc
The <i>Gaia</i>-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc Open
Context. The last decade has seen a revolution in our knowledge of the Galaxy thanks to the Gaia and asteroseismic space missions and the ground-based spectroscopic surveys. Aims. To complete this picture, it is necessary to map the ages o…
View article: HD 74438: A tight spectroscopic quadruple as possible progenitor of sub-Chandrasekhar Type Ia supernovae
HD 74438: A tight spectroscopic quadruple as possible progenitor of sub-Chandrasekhar Type Ia supernovae Open
Stars often form in multiple systems and may follow a complex evolution involving mass transfer and collisions, leading to mergers that are possible progenitors of Type Ia supernovae (SNe) [1, 2]. The progenitors of such explosions are sti…
View article: <i>Gaia</i>-ESO survey: Lithium abundances in open cluster Red Clump stars
<i>Gaia</i>-ESO survey: Lithium abundances in open cluster Red Clump stars Open
Context. It has recently been suggested that all giant stars with masses below 2 M ⊙ suffer an episode of surface lithium enrichment between the tip of the red giant branch (RGB) and the red clump (RC). Aims. We test if the above result ca…
View article: The Gaia-ESO survey: Lithium abundances in open cluster Red Clump stars
The Gaia-ESO survey: Lithium abundances in open cluster Red Clump stars Open
It has recently been suggested that all giant stars with mass below 2 $M_{\odot}$ suffer an episode of surface lithium enrichment between the tip of the red giant branch (RGB) and the red clump (RC). We test if the above result can be conf…
View article: The <i>Gaia</i>-ESO Survey: a new approach to chemically characterising young open clusters
The <i>Gaia</i>-ESO Survey: a new approach to chemically characterising young open clusters Open
Context. Young open clusters (ages of less than 200 Myr) have been observed to exhibit several peculiarities in their chemical compositions. These anomalies include a slightly sub-solar iron content, super-solar abundances of some atomic s…
View article: Magnetic-buoyancy-induced mixing in AGB stars: a theoretical explanation of the non-universal relation of [Y/Mg] to age
Magnetic-buoyancy-induced mixing in AGB stars: a theoretical explanation of the non-universal relation of [Y/Mg] to age Open
Context. Abundance ratios involving Y or other slow-neutron capture elements are routinely used to infer stellar ages. Aims. We aim to explain the observed [Y/H] and [Y/Mg] abundance ratios of star clusters located in the inner disc with a…
View article: The Gaia-ESO Survey: Calibrating the lithium-age relation with open clusters and associations. I. Cluster age range and initial membership selections
The Gaia-ESO Survey: Calibrating the lithium-age relation with open clusters and associations. I. Cluster age range and initial membership selections Open
Previous studies of open clusters have shown that lithium depletion is not only strongly age dependent but also shows a complex pattern with other parameters that is not yet understood. For pre- and main-sequence late-type stars, these par…
View article: The <i>Gaia</i>-ESO Survey: Calibrating the lithium–age relation with open clusters and associations
The <i>Gaia</i>-ESO Survey: Calibrating the lithium–age relation with open clusters and associations Open
Context. Previous studies of open clusters have shown that lithium depletion is not only strongly age dependent but also shows a complex pattern with other parameters that is not yet understood. For pre- and main-sequence late-type stars, …
View article: The Gaia-ESO survey: the non-universality of the age–chemical-clocks–metallicity relations in the Galactic disc⋆⋆⋆
The Gaia-ESO survey: the non-universality of the age–chemical-clocks–metallicity relations in the Galactic disc⋆⋆⋆ Open
Context. In the era of large spectroscopic surveys, massive databases of high-quality spectra coupled with the products of the Gaia satellite provide tools to outline a new picture of our Galaxy. In this framework, an important piece of in…