Search Publications
The Radcliffe wave as the gas spine of the Orion arm
Benjamin, R. A.; Gallagher, J. S., III; Drimmel, R. +7 more
The Radcliffe wave is a ∼3 kpc long coherent gas structure containing most of the star-forming complexes near the Sun. In this Letter we aim to find a Galactic context for the Radcliffe wave by looking into a possible relationship between the gas structure and the Orion (local) arm. We use catalogs of massive stars and young open clusters based on…
And then they were two: Detection of non-thermal radio emission from the bow shocks of two runaway stars
Menten, K. M.; Brose, R.; Gvaramadze, V. V. +7 more
Context. In recent years, winds from massive stars have been considered promising sites for investigating relativistic particle acceleration. In particular, the resulting bow-shaped shocks from the interaction of the supersonic winds of runaway stars with interstellar matter have been intensively observed at many different wavelengths, from radio …
The disk of FU Orionis viewed with MATISSE/VLTI. First interferometric observations in L and M bands
Waters, L. B. F. M.; Zhu, Z.; Liu, H. B. +30 more
Aims: We studied the accretion disk of the archetypal eruptive young star FU Orionis with the use of mid-infrared interferometry, which enabled us to resolve the innermost regions of the disk down to a spatial resolution of 3 milliarcseconds (mas) in the L band, that is, within 1 au of the protostar.
Methods: We used the interferometric …
Stellar dating using chemical clocks and Bayesian inference
Chaplin, W. J.; Moya, A.; Sarro, L. M. +3 more
Context. Dating stars is a major challenge with a deep impact on many astrophysical fields. One of the most promising techniques for this is using chemical abundances. Recent space- and ground-based facilities have improved the quantity of stars with accurate observations. This has opened the door for using Bayesian inference tools to maximise the…
Escape from the Bermuda cluster: Orphanization by multiple stellar ejections
Weiler, M.; Maíz Apellániz, J.; Barbá, R. H. +1 more
Context. Dynamical interactions in young stellar clusters can eject massive stars early in their lives and significantly alter their mass functions. If all of the most massive stars are lost, we are left with an orphan cluster.
Aims: We study the Bermuda cluster (Villafranca O-014 NW), the most significant young stellar group in the North Ame…
A bottom-up search for Lyman-continuum leakage in the Hubble Ultra Deep Field
Hayes, M.; Melinder, J.; Rivera-Thorsen, T. E.
Context. When studying the production and escape of Lyman continuum (LyC) from galaxies, it is standard to rely on an array of indirect observational tracers in the preselection of candidate leakers.
Aims: In this work, we investigate how much ionizing radiation might be missed due to these selection criteria by completely removing them and p…
Bridging the gap between Monte Carlo simulations and measurements of the LISA Pathfinder test-mass charging for LISA
Cesarini, A.; Grimani, C.; Fabi, M. +2 more
Context. Cubic gold-platinum free-falling test masses (TMs) constitute the mirrors of future LISA and LISA-like interferometers for low-frequency gravitational wave detection in space. High-energy particles of Galactic and solar origin charge the TMs and thus induce spurious electrostatic and magnetic forces that limit the sensitivity of these int…
Constraints on the structure and seasonal variations of Triton's atmosphere from the 5 October 2017 stellar occultation and previous observations
Forget, F.; Strobel, D. F.; Hueso, R. +234 more
Context. A stellar occultation by Neptune's main satellite, Triton, was observed on 5 October 2017 from Europe, North Africa, and the USA. We derived 90 light curves from this event, 42 of which yielded a central flash detection.
Aims: We aimed at constraining Triton's atmospheric structure and the seasonal variations of its atmospheric press…
Deep study of A399-401: Application of a wide-field facet calibration
Brunetti, G.; Shimwell, T. W.; Tasse, C. +6 more
Context. Diffuse synchrotron emission pervades numerous galaxy clusters, indicating the existence of cosmic rays and magnetic fields throughout the intra-cluster medium. The general consensus is that this emission is generated by shocks and turbulence that are activated during cluster merger events and cause a (re-)acceleration of particles to hig…
A first glimpse at the line-of-sight structure of the Milky Way's nuclear stellar disc
Nogueras-Lara, F.
Context. The nuclear stellar disc (NSD) is a dense stellar structure at the centre of our Galaxy. Given its proximity, it constitutes a unique laboratory to understand other galactic nuclei. Nevertheless, the high crowding and extinction hamper its study, and even its morphology and kinematics are not yet totally clear.
Aims: In this work we …