| The merger that led to the formation of the Milky Way’s inner stellar halo and thick disk A Helmi, C Babusiaux, HH Koppelman, D Massari, J Veljanoski, ... Nature 563 (7729), 85-88, 2018 | 1171 | 2018 |
| Origin of the system of globular clusters in the Milky Way D Massari, HH Koppelman, A Helmi Astronomy & Astrophysics 630, L4, 2019 | 384 | 2019 |
| Multiple retrograde substructures in the Galactic halo: A shattered view of Galactic history HH Koppelman, A Helmi, D Massari, AM Price-Whelan, TK Starkenburg Astronomy & Astrophysics 631, L9, 2019 | 230 | 2019 |
| One large blob and many streams frosting the nearby stellar halo in Gaia DR2 H Koppelman, A Helmi, J Veljanoski The Astrophysical Journal Letters 860 (1), L11, 2018 | 181 | 2018 |
| Characterization and history of the Helmi streams with Gaia DR2 HH Koppelman, A Helmi, D Massari, S Roelenga, U Bastian Astronomy & Astrophysics 625, A5, 2019 | 135 | 2019 |
| The Pristine survey IV: approaching the Galactic metallicity floor with the discovery of an ultra-metal-poor star E Starkenburg, DS Aguado, P Bonifacio, E Caffau, P Jablonka, C Lardo, ... Monthly Notices of the Royal Astronomical Society 481 (3), 3838-3852, 2018 | 76 | 2018 |
| The messy merger of a large satellite and a Milky Way-like galaxy HH Koppelman, ROY Bos, A Helmi Astronomy & Astrophysics 642, L18, 2020 | 53 | 2020 |
| Electrically tunable wetting defects characterized by a simple capillary force sensor D ’t Mannetje, A Banpurkar, H Koppelman, MHG Duits, D van den Ende, ... Langmuir 29 (31), 9944-9949, 2013 | 48 | 2013 |
| Determination of the escape velocity of the Milky Way using a halo sample selected based on proper motion HH Koppelman, A Helmi Astronomy & Astrophysics 649, A136, 2021 | 30* | 2021 |
| Substructure in the stellar halo near the Sun-I. Data-driven clustering in integrals-of-motion space SS Lövdal, T Ruiz-Lara, HH Koppelman, T Matsuno, E Dodd, A Helmi Astronomy & Astrophysics 665, A57, 2022 | 29 | 2022 |
| Galactic potential constraints from clustering in action space of combined stellar stream data S Reino, EM Rossi, RE Sanderson, E Sellentin, A Helmi, HH Koppelman, ... Monthly Notices of the Royal Astronomical Society 502 (3), 4170-4193, 2021 | 29 | 2021 |
| Substructure in the stellar halo near the Sun-II. Characterisation of independent structures T Ruiz-Lara, T Matsuno, SS Lövdal, A Helmi, E Dodd, HH Koppelman Astronomy & Astrophysics 665, A58, 2022 | 28 | 2022 |
| High-precision chemical abundances of Galactic building blocks-The distinct chemical abundance sequence of Sequoia T Matsuno, HH Koppelman, A Helmi, W Aoki, MN Ishigaki, T Suda, Z Yuan, ... Astronomy & Astrophysics 661, A103, 2022 | 26 | 2022 |
| High-precision chemical abundances of Galactic building blocks-II. Revisiting the chemical distinctness of the Helmi streams T Matsuno, E Dodd, HH Koppelman, A Helmi, MN Ishigaki, W Aoki, J Zhao, ... Astronomy & Astrophysics 665, A46, 2022 | 21 | 2022 |
| Age determination of galaxy merger remnant stars using asteroseismology CC Borre, V Aguirre Børsen-Koch, A Helmi, HH Koppelman, MB Nielsen, ... Monthly Notices of the Royal Astronomical Society 514 (2), 2527-2544, 2022 | 19 | 2022 |
| Substructures, resonances, and debris streams-A new constraint on the inner shape of the Galactic dark halo E Dodd, A Helmi, HH Koppelman Astronomy & Astrophysics 659, A61, 2022 | 19 | 2022 |
| Hidden deep in the halo: selection of a reduced proper motion halo catalogue and mining retrograde streams in the velocity space A Viswanathan, E Starkenburg, HH Koppelman, A Helmi, E Balbinot, ... Monthly Notices of the Royal Astronomical Society 521 (2), 2087-2102, 2023 | 13 | 2023 |
| Frequencies, chaos, and resonances: A study of orbital parameters of nearby thick-disc and halo stars HH Koppelman, JHJ Hagen, A Helmi Astronomy & Astrophysics 647, A37, 2021 | 12 | 2021 |
| The reduced proper motion selected halo: Methods and description of the catalogue HH Koppelman, A Helmi Astronomy & Astrophysics 645, A69, 2021 | 12 | 2021 |
| The time evolution of gaps in tidal streams A Helmi, HH Koppelman The Astrophysical Journal Letters 828 (1), L10, 2016 | 11 | 2016 |
