T. Antoja
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View article: Delayed phase mixing in the self-gravitating Galactic disc
Delayed phase mixing in the self-gravitating Galactic disc Open
The Gaia phase spiral is considered to work as a dynamical clock for dating past perturbations, but most of the previous studies neglected the disc's self-gravity, potentially biasing estimates of the phase spiral's excitation time. We aim…
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: Analogues of the Milky Way-Sagittarius interaction in the TNG50: effect on the Milky Way
Analogues of the Milky Way-Sagittarius interaction in the TNG50: effect on the Milky Way Open
The Sagittarius Dwarf Galaxy is undoubtedly being disrupted in the tidal field of the Milky Way. The Milky Way disc is also found to be in a state of disequilibrium. The role of the Sagittarius in driving or contributing to this disequilib…
View article: Formation of the Two-armed Phase Spiral from Multiple External Perturbations
Formation of the Two-armed Phase Spiral from Multiple External Perturbations Open
Recent studies using the Gaia DR3 data have revealed a two-armed phase spiral in the Z – V Z phase space in the inner disk. In this study, we present new features of the two-armed phase spiral revealed by the Gaia data and a new mechanism …
View article: Searching for new hypervelocity stars with <i>Gaia</i> DR3 and VLT/FORS2 spectroscopy
Searching for new hypervelocity stars with <i>Gaia</i> DR3 and VLT/FORS2 spectroscopy Open
Context. Hypervelocity stars are unique objects that move through the Milky Way at speeds exceeding the local escape velocity. They provide valuable insights into the gravitational potential of the Galaxy and the properties of its central …
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: Formation of the Two-Armed Phase Spiral from Multiple External Perturbations
Formation of the Two-Armed Phase Spiral from Multiple External Perturbations Open
Recent studies using the Gaia DR3 data have revealed a two-armed phase spiral in the $Z-V_Z$ phase space in the inner disk. In this study, we present new features of the two-armed phase spiral revealed by the Gaia Data and a new mechanism …
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: Radial Wave in the Galactic Disk: New Clues to Discriminate Different Perturbations
Radial Wave in the Galactic Disk: New Clues to Discriminate Different Perturbations Open
Decoding the key dynamical processes that shape the Galactic disk structure is crucial for reconstructing the Milky Way’s evolution history. The second Gaia data release unveils a novel wave pattern in the L Z −〈 V R 〉 space, but its forma…
View article: Assessing the robustness of the Galactic rotation curve inferred from the Jeans equations using <i>Gaia</i> DR3 and cosmological simulations
Assessing the robustness of the Galactic rotation curve inferred from the Jeans equations using <i>Gaia</i> DR3 and cosmological simulations Open
Context . Several authors have recently applied Jeans modelling to Gaia -based datasets to infer the circular velocity curve for the Milky Way. These works have consistently found evidence for a continuous decline in the rotation curve bey…
View article: On the Galactic rotation curve inferred from the Jeans equations Assessing its robustness using Gaia DR3 and cosmological simulations
On the Galactic rotation curve inferred from the Jeans equations Assessing its robustness using Gaia DR3 and cosmological simulations Open
Several works have recently applied Jeans modelling to Gaia-based datasets to infer the circular velocity curve for the Milky Way. Such works have consistently found evidence for a continuous decline in the rotation curve beyond $\sim$15kp…
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: Radial Wave in the Galactic Disk: New Clues to Discriminate Different Perturbations
Radial Wave in the Galactic Disk: New Clues to Discriminate Different Perturbations Open
Decoding the key dynamical processes that shape the Galactic disk structure is crucial for reconstructing the Milky Way's evolution history. The second Gaia data release unveils a novel wave pattern in the $L_Z-\langle V_R\rangle$ space, b…
View article: Structure, kinematics, and time evolution of the Galactic warp from Classical Cepheids
Structure, kinematics, and time evolution of the Galactic warp from Classical Cepheids Open
The warp is a well-known undulation of the Milky Way disc. Its structure has been widely studied, but only since Gaia DR2 has it been possible to reveal its kinematic signature beyond the solar neighbourhood. In this work, we present an an…
View article: Structure, kinematics and time evolution of the Galactic Warp from Classical Cepheids
Structure, kinematics and time evolution of the Galactic Warp from Classical Cepheids Open
The warp is a well-known undulation of the Milky Way disc. Its structure has been widely studied, but only since Gaia DR2 has it been possible to reveal its kinematic signature beyond the solar neighbourhood. In this work we present an ana…
View article: All-sky Kinematics and Chemistry of Monoceros Stellar Overdensity
All-sky Kinematics and Chemistry of Monoceros Stellar Overdensity Open
We explore the kinematic and chemical properties of the Monoceros stellar overdensity by combining data from the Two Micron All Sky Survey, Wide-field Infrared Survey Explorer, APOGEE, and Gaia. Monoceros is a structure located toward the …
View article: Galactoseismology in cosmological simulations
Galactoseismology in cosmological simulations Open
Context. Complex models recently became available for studying the dynamics of disk galaxies such as the Milky Way (MW). These models include the global dynamics from dwarf satellite galaxies, dark matter halo structure, gas infall, and st…
View article: Galactoseismology in cosmological simulations: Vertical perturbations by dark matter, satellite galaxies and gas
Galactoseismology in cosmological simulations: Vertical perturbations by dark matter, satellite galaxies and gas Open
Only recently, complex models that include the global dynamics from dwarf satellite galaxies, dark matter halo structure, gas infalls, and stellar disk in a cosmological context became available to study the dynamics of disk galaxies such …
View article: All-sky Kinematics and Chemistry of Monoceros Stellar Overdensity
All-sky Kinematics and Chemistry of Monoceros Stellar Overdensity Open
We explore the kinematic and chemical properties of Monoceros stellar overdensity by combining data from 2MASS, WISE, APOGEE, and $\text{Gaia}$. Monoceros is a structure located towards the Galactic anticenter and close to the disk. We ide…
View article: Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc Open
Over the last few years, many studies have found an empirical relationship between the abundance of a star and its age. Here we estimate spectroscopic stellar ages for 178 825 red-giant stars observed by the APOGEE survey with a median sta…
View article: Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc Open
Over the last few years, many studies have found an empirical relationship between the abundance of a star and its age. Here we estimate spectroscopic stellar ages for 178 825 red-giant stars observed by the APOGEE survey with a median sta…
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: The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation
The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation Open
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, saw first light in late 2022. WEAVE comprises a new 2-deg field-of-view prime-focus corrector system, a nearly 1000-multiple…
View article: Spiral-like features in the disc revealed by <i>Gaia</i> DR3 radial actions
Spiral-like features in the disc revealed by <i>Gaia</i> DR3 radial actions Open
Context. The so-called action variables are specific functions of the positions and velocities that remain constant along the stellar orbit. The astrometry provided by Gaia Early Data Release 3 (EDR3), combined with the velocities inferred…
View article: The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation
The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation Open
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, will see first light in late 2022. WEAVE comprises a new 2-degree field-of-view prime-focus corrector system, a nearly 1000-…
View article: <i>Gaia</i>Data Release 3
<i>Gaia</i>Data Release 3 Open
Context. Gaia Data Release 3 ( Gaia DR3) contains the second release of the combined radial velocities. It is based on the spectra collected during the first 34 months of the nominal mission. The longer time baseline and the improvements o…
View article: Kinematic analysis of the Large Magellanic Cloud using <i>Gaia</i> DR3
Kinematic analysis of the Large Magellanic Cloud using <i>Gaia</i> DR3 Open
Context. The high quality of the Gaia mission data has allowed for studies of the internal kinematics of the Large Magellanic Cloud (LMC) to be undertaken in unprecedented detail, providing insights into the non-axisymmetric structure of i…
View article: Kinematic analysis of the Large Magellanic Cloud using Gaia DR3
Kinematic analysis of the Large Magellanic Cloud using Gaia DR3 Open
Context: The high quality of the Gaia mission data is allowing to study the internal kinematics of the Large Magellanic Cloud (LMC) in unprecedented detail, providing insights on the non-axisymmetric structure of its disc. Aims: To define …
View article: The disturbed outer Milky Way disc
The disturbed outer Milky Way disc Open
The outer parts of the Milky Way’s disc are significantly out of equilibrium. Using only distances and proper motions of stars from Gaia’s Early Data Release 3, in the range |b| < 10°, 130° < ℓ < 230°, we show that for stars in th…