Marcel Bernet
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View article: The dark matter wake of a galactic bar revealed by multichannel singular spectral analysis
The dark matter wake of a galactic bar revealed by multichannel singular spectral analysis Open
The Milky Way is known to contain a stellar bar, as are a significant fraction of disc galaxies across the universe. Our understanding of bar evolution, both theoretically and through analysis of simulations indicates that bars both grow i…
View article: Dynamics of tidal spiral arms: Machine learning-assisted identification of equations and application to the Milky Way
Dynamics of tidal spiral arms: Machine learning-assisted identification of equations and application to the Milky Way Open
Context . Understanding the spiral arms of the Milky Way (MW) remains a key open question in galactic dynamics. Tidal perturbations, such as the recent passage of the Sagittarius dwarf galaxy (Sgr), could play a significant role in excitin…
View article: A non-axisymmetric potential for the Milky Way disk
A non-axisymmetric potential for the Milky Way disk Open
We provide a purely dynamical global map of the non-axisymmetric structure of the Milky Way disk. For this, we exploited the information contained within the in-plane motions of disk stars from Gaia DR3 to adjust a model of the Galactic po…
View article: A non-axisymmetric potential for the Milky Way disk
A non-axisymmetric potential for the Milky Way disk Open
We provide a purely dynamical global map of the non-axisymmetric structure of the Milky Way disk. For this, we exploited the information contained within the in-plane motions of disk stars from Gaia DR3 to adjust a model of the Galactic po…
View article: Dark matter spiral arms in Milky Way-like halos
Dark matter spiral arms in Milky Way-like halos Open
Context . The coupling between the dark matter (DM) halo and the stellar disc is a key factor in galactic evolution. While the interaction between structures like the Galactic bar and DM halos has been explored (e.g. slowing down of the ba…
View article: KRATOS: A large suite of <i>N</i>-body simulations to interpret the stellar kinematics of LMC-like discs
KRATOS: A large suite of <i>N</i>-body simulations to interpret the stellar kinematics of LMC-like discs Open
Context. The Large and Small Magellanic Clouds (LMC and SMC, respectively) are the brightest satellites of the Milky Way (MW), and for the last thousand million years they have been interacting with one another. As observations only provid…
View article: KRATOS: A large suite of N-body simulations to interpret the stellar kinematics of LMC-like discs
KRATOS: A large suite of N-body simulations to interpret the stellar kinematics of LMC-like discs Open
We present KRATOS, a comprehensive suite of 28 open access pure N-body simulations of isolated and interacting LMC-like galaxies, to study the formation of substructures in their disc after the interaction with an SMC-mass galaxy. The prim…
View article: Radial and azimuthal gradients of the moving groups in <i>Gaia</i> DR3: The slow and fast bar degeneracy problem
Radial and azimuthal gradients of the moving groups in <i>Gaia</i> DR3: The slow and fast bar degeneracy problem Open
Context. The structure and dynamics of the central bar of the Milky Way (MW) are still under debate whilst being fundamental ingredients for the evolution of our Galaxy. The recent Gaia DR3 offers an unprecedented detailed view of the 6D p…
View article: The phase spiral in <i>Gaia</i> DR3
The phase spiral in <i>Gaia</i> DR3 Open
Aims. We aim to study the phase spiral in the Milky Way (MW) disc with data from the third data release of Gaia (DR3) and use it as an inference tool to decipher the late-time evolution of the Galaxy. Methods. We used an edge-detection alg…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Gaia Data Release 3 ( Gaia DR3) time series data may contain spurious signals related to the time-dependent scan angle. Aims. We aim to explain the origin of scan-angle-dependent signals and how they can lead to spurious periods, …
View article: The phase spiral in Gaia DR3
The phase spiral in Gaia DR3 Open
We aim to study the phase spiral in the Milky Way (MW) with Gaia DR3. We used an edge detection algorithm to find the border of the phase spiral, allowing us to robustly quantify its shape at different positions and for different selection…
View article: Gaia Data Release 3: Gaia scan-angle dependent signals and spurious periods
Gaia Data Release 3: Gaia scan-angle dependent signals and spurious periods Open
Context: Gaia DR3 time series data may contain spurious signals related to the time-dependent scan angle. Aims: We aim to explain the origin of scan-angle dependent signals and how they can lead to spurious periods, provide statistics to i…
View article: From ridges to manifolds: 3D characterization of the moving groups in the Milky Way disc
From ridges to manifolds: 3D characterization of the moving groups in the Milky Way disc Open
Context. The details of the effect of the bar and spiral arms on the disc dynamics of the Milky Way are still unknown. The stellar velocity distribution in the solar neighbourhood displays kinematic substructures, which are possibly signat…
View article: Tidally induced spiral arm wraps encoded in phase space
Tidally induced spiral arm wraps encoded in phase space Open
Context. The impact of Sagittarius and other satellite galaxies such as the Large Magellanic Cloud on our Galaxy and in particular its disc is gradually being disclosed. Simulations tailored to the interaction of the Milky Way (MW) and Sag…
View article: From ridges to manifolds: 3D characterization of the moving groups in the Milky Way disc
From ridges to manifolds: 3D characterization of the moving groups in the Milky Way disc Open
The stellar velocity distribution in the Solar Neighbourhood displays kinematic substructures, which are possibly signatures of the bar and spiral arms of the Milky Way and of previous accretion events. These kinematic substructures -- mov…
View article: <i>Gaia</i> Early Data Release 3
<i>Gaia</i> Early Data Release 3 Open
Context. Gaia -CRF3 is the celestial reference frame for positions and proper motions in the third release of data from the Gaia mission, Gaia DR3 (and for the early third release, Gaia EDR3, which contains identical astrometric results). …
View article: Gaia Early Data Release 3: The celestial reference frame (Gaia-CRF3)
Gaia Early Data Release 3: The celestial reference frame (Gaia-CRF3) Open
Gaia-CRF3 is the celestial reference frame for positions and proper motions\nin the third release of data from the Gaia mission, Gaia DR3 (and for the early\nthird release, Gaia EDR3, which contains identical astrometric results). The\nref…
View article: Gaia Early Data Release 3. Building the Gaia DR3 source list -- Cross-match of Gaia observations
Gaia Early Data Release 3. Building the Gaia DR3 source list -- Cross-match of Gaia observations Open
The Gaia Early Data Release 3 (Gaia EDR3) contains results derived from 78 billion individual field-of-view transits of 2.5 billion sources collected by the European Space Agency's Gaia mission during its first 34 months of continuous scan…
View article: Gaia Early Data Release 3: The astrometric solution
Gaia Early Data Release 3: The astrometric solution Open
Gaia Early Data Release 3 (Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operational p…
View article: <i>Gaia</i>Early Data Release 3
<i>Gaia</i>Early Data Release 3 Open
Context. The Gaia Early Data Release 3 ( Gaia EDR3) contains results derived from 78 billion individual field-of-view transits of 2.5 billion sources collected by the European Space Agency’s Gaia mission during its first 34 months of conti…
View article: <i>Gaia</i>Early Data Release 3
<i>Gaia</i>Early Data Release 3 Open
Context. Gaia Early Data Release 3 ( Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = 3–21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operat…