Search Publications
The Pristine survey: XXV. The very metal-poor Galaxy: Chemodynamics through the follow-up of the Pristine-Gaia synthetic catalogue
Massana, Pol; Sestito, Federico; Ibata, Rodrigo A. +27 more
Context. The Pristine-Gaia synthetic catalogue of reliable photometric metallicities makes use of spectrophotometric information from Gaia DR3 XP spectra to calculate metallicity-sensitive CaHK magnitudes, which in turn provides photometric metallicities for ~30 million FGK stars using the Pristine survey model and the survey's training sample. Ai…
Uncovering the invisible: A study of Gaia18ajz, a candidate black hole revealed by microlensing
Mróz, P.; Gromadzki, M.; Rybicki, K. +30 more
Context. Identifying black holes is essential for our understanding of the development of stars and can reveal novel principles of physics. Gravitational microlensing provides an exceptional opportunity to examine an undetectable population of black holes in the Milky Way. In particular, long-lasting events are likely to be associated with massive…
Dynamical confirmation of a black hole in the X-ray transient Swift J1727.8‑1613
Armas Padilla, M.; Mata Sánchez, D.; Muñoz-Darias, T. +3 more
The X-ray transient Swift J1727.8‑1613 ended its 10-month discovery outburst in June of 2024, when it reached an optical brightness comparable to pre-discovery magnitudes. With the aim of performing a dynamical study, we launched an optical spectroscopy campaign with the GTC telescope. We detected the companion star and constructed its radial velo…
Abundance ties: Nephele and the globular cluster population accreted with ω Cen: Based on APOGEE DR17 and Gaia EDR3
Ryde, N.; Casamiquela, L.; Haywood, M. +8 more
Context. The peculiar Galactic globular cluster ω Centauri (NGC 5139) has drawn attention for its unique features, such as an unusually high stellar mass compared to other Galactic globular clusters and a broad distribution of chemical elements. These features have led to the hypothesis that ω Centauri might be the nuclear remnant of an ancient dw…
The kinematics of 30 Milky Way globular clusters and the multiple stellar populations within
Cabrera-Ziri, I.; Hilker, M.; Carbajo-Hijarrubia, J. +5 more
Aims. The spectroscopic and photometric classification of multiple stellar populations (MPs) in Galactic globular clusters (GCs) has enabled comparisons between contemporary observations and formation theories regarding the initial spatial configurations of the MPs. However, the kinematics of these MPs is an aspect that requires more attention. We…
MINDS: The influence of outer dust disc structure on the volatile delivery to the inner disc
Henning, Thomas; Güdel, Manuel; Tabone, Benoît +18 more
Context. The Atacama Large Millimeter/submillimeter Array (ALMA) has revealed that the millimetre dust structures of protoplanetary discs are extremely diverse, ranging from small and compact dust discs to large discs with multiple rings and gaps. It has been proposed that the strength of H2O emission in the inner disc particularly depe…
The Gaia-ESO survey: New spectroscopic binaries in the Milky Way
Jorissen, A.; Zwitter, T.; Vallenari, A. +14 more
Context. The Gaia-ESO survey (GES) is a large public spectroscopic survey that acquired spectra for more than 100 000 stars across all major components of the Milky Way. In addition to atmospheric parameters and stellar abundances that have been derived in previous papers of this series, the GES spectra allow us to detect spectroscopic binaries wi…
Connection between planetary He I λ10 830 Å absorption and extreme-ultraviolet emission of planet-host stars
Sánchez-López, A.; López-Puertas, M.; Amado, P. J. +13 more
Context. The detection of the He I λ10 830 Å triplet in exoplanet atmospheres has opened a new window for probing planetary properties, including atmospheric escape. Unlike Lyman α, the triplet is significantly less affected by interstellar medium (ISM) absorption. Sufficient X-ray and extreme ultraviolet (XUV) stellar irradiation may trigger the …
Spatially coherent 3D distributions of HI and CO in the Milky Way
Edenhofer, Gordian; Mertsch, Philipp; Söding, Laurin +6 more
Context. The spatial distribution of the gaseous components of the Milky Way is of great importance for a number of different fields, for example, Galactic structure, star formation, and cosmic rays. However, obtaining distance information to gaseous clouds in the interstellar medium from Doppler-shifted line emission is notoriously difficult give…
The magnetic field of the Radcliffe wave: Starlight polarization at the nearest approach to the Sun
Alves, J.; Panopoulou, G. V.; Soler, J. D. +6 more
Aims. We investigate the geometry of the magnetic field toward the Radcliffe wave, a coherent part of the nearby Local Arm of 3 kpc in length recently discovered via three-dimensional dust mapping. Methods. We used archival stellar polarization in the optical and new measurements in the near-infrared to trace the magnetic field as projected on the…