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9 papers · 2 filters
The evolution of the Milky Way's thin disc radial metallicity gradient with K2 asteroseismic ages
Emma Willett, Andrea Miglio, J. Ted Mackereth +8
The radial metallicity distribution of the Milky Way's disc is an important observational constraint for models of the formation and evolution of our Galaxy. It informs our underst…
Chemical clocks and their time zones: understanding the [s/Mg]--age relation with birth radii
Bridget Ratcliffe, Ivan Minchev, Gabriele Cescutti +5
The relative enrichment of s-process to -elements ([s/]) has been linked with age, providing a potentially useful avenue in exploring the Milky Way's chemical evolution. Howe…
Galactic ArchaeoLogIcaL ExcavatiOns (GALILEO) II. t-SNE Portrait of Local Fossil Relics and Structures
Mario Ortigoza-Urdaneta, Katherine Vieira, José G. Fernández-Trincado +7
Based on high-quality APOGEE DR17 and Gaia DR3 data for 1,742 red giants stars within 5 kpc of the Sun and not rotating with the Galactic disc ( 100 km s), we use the…
The Chemodynamical Nature of the Triangulum-Andromeda Overdensity
Yuri Abuchaim, Hélio D. Perottoni, Silvia Rossi +7
We present a chemodynamical study of the Triangulum-Andromeda overdensity (TriAnd) employing a sample of 31 candidate stars observed with the GRACES high-resolution (=40,000) sp…
Unveiling the time evolution of chemical abundances across the Milky Way disk with APOGEE
Bridget Ratcliffe, Ivan Minchev, Friedrich Anders +12
Chemical abundances are an essential tool in untangling the Milky Way's enrichment history. However, the evolution of the interstellar medium abundance gradient with cosmic time is…
Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
F. Anders, P. Gispert, B. Ratcliffe +12
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-…
StarHorse results for spectroscopic surveys + Gaia DR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young-alpha rich stars
Anna B. A. Queiroz, Friedrich Anders, Cristina Chiappini +16
The Gaia mission has provided an invaluable wealth of astrometric data for more than a billion stars in our Galaxy. The synergy between Gaia astrometry, photometry, and spectroscop…
Stellar-mass black holes in the Hyades star cluster?
Stefano Torniamenti, Mark Gieles, Zephyr Penoyre +3
Astrophysical models of binary-black hole mergers in the Universe require a significant fraction of stellar-mass black holes (BHs) to receive negligible natal kicks to explain the…
The multiplicity fraction in 202 open clusters from Gaia
J. Donada, F. Anders, C. Jordi +7
In this study, we estimate the fraction of binaries with high mass ratios for 202 open clusters in the extended solar neighbourhood (closer than 1.5 kpc from the Sun). This is one…