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The Age-Thickness Relation of the Milky Way Disk: A Tracer of Galactic Merging History
Lekshmi Thulasidharan, Elena D'Onghia, Robert Benjamin +3
The prevailing model of galaxy formation proposes that galaxies like the Milky Way are built through a series of mergers with smaller galaxies over time. However, the exact details…
Signatures of simulated spiral arms on radial actions
P. A. Palicio, A. Recio-Blanco, T. Tepper-Garcia +7
Among the various implications of the spiral arms, it has been observed in the Milky Way disc that the distribution of radial actions from the Gaia Data Release 3 exhibits structur…
Constraints on the history of Galactic spiral arms revealed by Gaia GSP-Spec alpha-elements
M. Barbillon, A. Recio-Blanco, E. Poggio +4
The distribution of chemical elements in the Galactic disc can reveal fundamental clues on the physical processes that led to the current configuration of our Galaxy. We map chemic…
GaiaUnlimited: The old stellar disc of the Milky Way as traced by the Red Clump
Shourya Khanna, Jie Yu, Ronald Drimmel +9
We present an exploration of the Milky Way's structural parameters using an all-sky sample of RC giants to map the stellar density from the Galactic disc beyond 3 kpc. These evolve…
Comment on 'a slightly oblate dark matter halo revealed by a retrograde precessing Galactic disk warp' by Huang et al
Walter Dehnen, Ralph Schönrich, Ronald Drimmel +3
Huang et al. (2024) measured the derivative of the phase of the Galactic warp traced by classical Cepheids with respect to their age and interpreted it as the…
The Great Wave: Evidence of a large-scale vertical corrugation propagating outwards in the Galactic disc
E. Poggio, S. Khanna, R. Drimmel +6
We analyse the three-dimensional structure and kinematics of two samples of young stars in the Galactic disc, containing respectively young giants (17000 stars out to he…
The Milky Way as Seen by Classical Cepheids II: Spiral Structure
Ronald Drimmel, Shourya Khanna, Eloisa Poggio +1
As a relatively young and bright population and the archetype of standard candles, classical Cepheids are an ideal population on which to trace the non-axisymmetric structure in th…
The Milky Way as Seen by Classical Cepheids I: Distances Based on Mid-infrared Photometry
Dorota M. Skowron, Ronald Drimmel, Shourya Khanna +3
Classical Cepheids are the archetype of the standard candle, thanks to the period-luminosity relation which allows to measure their intrinsic brightness. They are also relatively y…
Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry
Gaia Collaboration, P. Panuzzo, T. Mazeh +412
Gravitational waves from black-hole merging events have revealed a population of extra-galactic BHs residing in short-period binaries with masses that are higher than expected base…