Search Publications
The e-TidalGCs project. Modeling the extra-tidal features generated by Galactic globular clusters
Mastrobuono-Battisti, Alessandra; Khoperskov, Sergey; Di Matteo, Paola +5 more
We present the e-TidalGCs project, aimed at modeling and predicting the extra-tidal features surrounding all Galactic globular clusters for which 6D phase-space information, masses, and sizes are available (currently numbering 159 globular clusters). We focus the analysis and presentation of the results on the distribution of extra-tidal material …
Oxygen and iron in interstellar dust: An X-ray investigation
Waters, L. B. F. M.; Mutschke, H.; Costantini, E. +9 more
Understanding the chemistry of the interstellar medium (ISM) is fundamental for the comprehension of Galactic and stellar evolution. X-rays provide an excellent way to study the dust chemical composition and crystallinity along different sight lines in the Galaxy. In this work, we study the dust grain chemistry in the diffuse regions of the ISM in…
A new resonance-like feature in the outer disc of the Milky Way
Fouesneau, M.; Andrae, R.; Castro-Ginard, A. +18 more
Modern astrometric and spectroscopic surveys have revealed a wealth of structure in the phase space of stars in the Milky Way, with evidence of resonance features and non-equilibrium processes. Using the third Gaia data release, we present evidence of a new resonance-like feature in the outer disc of the Milky Way. The feature is most evident in t…
A super-Earth and a mini-Neptune near the 2:1 MMR straddling the radius valley around the nearby mid-M dwarf TOI-2096
Gabor, P.; Alonso, R.; Queloz, D. +72 more
Context. Several planetary formation models have been proposed to explain the observed abundance and variety of compositions of super-Earths and mini-Neptunes. In this context, multitransiting systems orbiting low-mass stars whose planets are close to the radius valley are benchmark systems, which help to elucidate which formation model dominates.…
Possible origin of the non-detection of metastable He I in the upper atmosphere of the hot Jupiter WASP-80b
Fossati, L.; Bonfanti, A.; Borsa, F. +5 more
Aims: We aim to constrain the origin of the non-detection of the metastable He I triplet at ≈10 830 Å obtained for the hot Jupiter WASP-80b.
Methods: We measure the X-ray flux of WASP-80 from archival observations and use it as input to scaling relations accounting for the coronal [Fe/O] abundance ratio in order to infer the extreme-ultr…
A new dynamical modeling of the WASP-47 system with CHEOPS observations
Alonso, R.; Deleuil, M.; Erikson, A. +80 more
Among the hundreds of known hot Jupiters (HJs), only five have been found to have companions on short-period orbits. Within this rare class of multiple planetary systems, the architecture of WASP-47 is unique, hosting an HJ (planet-b) with both an inner and an outer sub-Neptunian mass companion (-e and -d, respectively) as well as an additional no…
JWST uncovers helium and water abundance variations in the bulge globular cluster NGC 6440
Cadelano, Mario; Pallanca, Cristina; Dalessandro, Emanuele +9 more
We used ultra-deep observations obtained with the NIRCam aboard the James Webb Space Telescope to explore the stellar population of NGC 6440: a typical massive, obscured, and contaminated globular cluster formed and orbiting within the Galactic bulge. Leveraging the exceptional capabilities of this camera, we sampled the cluster down to about five…
Short-period pulsating hot-subdwarf stars observed by TESS. I. Southern ecliptic hemisphere
Van Grootel, V.; Charpinet, S.; Kilkenny, D. +7 more
We present results of a Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed in years 1 and 3 of the TESS mission, during which the southern ecliptic hemisphere was targeted. We describe the TESS data used and the details of the search method. For many of the targets, we use unpublishe…
Multiwavelength study of the galactic PeVatron candidate LHAASO J2108+5157
Antonelli, L. A.; Fukazawa, Y.; Gasparrini, D. +267 more
Context. Several new ultrahigh-energy (UHE) γ-ray sources have recently been discovered by the Large High Altitude Air Shower Observatory (LHAASO) collaboration. These represent a step forward in the search for the so-called Galactic PeVatrons, the enigmatic sources of the Galactic cosmic rays up to PeV energies. However, it has been shown that mu…
Potential scientific synergies in weak lensing studies between the CSST and Euclid space probes
Schrabback, T.; Zhang, J.; Kneib, J. P. +24 more
Aims: With the next generation of large surveys poised to join the ranks of observational cosmology in the near future, it is important to explore their potential synergies and to maximize their scientific outcomes. In this study, we aim to investigate the complementarity of two upcoming space missions: Euclid and the China Space Station Tele…