Search Publications
Milky Way archaeology using RR Lyrae and type II Cepheids. II. High-velocity RR Lyrae stars and Milky Way mass
Hansen, C. J.; Lemasle, B.; Fabrizio, M. +10 more
We report the discovery of high-velocity candidates among RR Lyrae stars found in the Milky Way halo. We identified nine RR Lyrae stars with Galactocentric velocities exceeding the local escape velocity based on the assumed Galaxy potential. Furthermore, based on a close examination of their orbits', we ruled out their ejection location in the Mil…
The ALPINE-ALMA [CII] survey: The population of [CII]-undetected galaxies and their role in the L[CII]-SFR relation
Schaerer, D.; Béthermin, M.; Silverman, J. D. +22 more
The [CII] 158 µm emission line represents one of the most profitable tools for the investigation of the high-redshift galaxies in the early Universe so far. Being one of the brightest cooling lines in the rest-frame far-infrared regime of star-forming galaxies, it has been successfully exploited as a tracer of the star-formation rate (SFR) i…
Data-driven, time-dependent modeling of pre-eruptive coronal magnetic field configuration at the periphery of NOAA AR 11726
Kilpua, E. K. J.; Pomoell, J.; Price, D. J. +4 more
Context. Data-driven, time-dependent magnetofrictional modeling has proved to be an efficient tool for studying the pre-eruptive build-up of energy for solar eruptions, and sometimes even the ejection of coronal flux ropes during eruptions. However, previous modeling works have illustrated the sensitivity of the results on the data-driven boundary…
Signs of late infall and possible planet formation around DR Tau using VLT/SPHERE and LBTI/LMIRCam
Rouan, D.; Ertel, S.; Henning, T. +31 more
Context. Protoplanetary disks around young stars often contain substructures like rings, gaps, and spirals that could be caused by interactions between the disk and forming planets.
Aims: We aim to study the young (1-3 Myr) star DR Tau in the near-infrared and characterize its disk, which was previously resolved through submillimeter interfer…
Westerlund 1 under the light of Gaia EDR3: Distance, isolation, extent, and a hidden population
Maíz Apellániz, J.; Negueruela, I.; Alfaro, E. J. +3 more
Context. The young massive cluster Westerlund 1 offers the promise of a grand laboratory for the study of high-mass star evolution, but its basic parameters are still poorly known.
Aims: In this paper, we aim at a better characterisation of the cluster by determining some basic kinematic properties and analysing the area surrounding the clust…
Diffuse radio emission from non-Planck galaxy clusters in the LoTSS-DR2 fields
Simionescu, A.; Zhang, X.; Di Gennaro, G. +17 more
Context. The presence of large-scale magnetic fields and ultra-relativistic electrons in the intra-cluster medium (ICM) is confirmed through the detection of diffuse radio synchrotron sources, so-called radio halos and relics. Due to their steep-spectrum nature, these sources are rarely detected at frequencies above a few gigahertz, especially in …
Discovery and mass measurement of the hot, transiting, Earth-sized planet, GJ 3929 b
Amado, P. J.; Caballero, J. A.; Pallé, E. +64 more
We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180-18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius…
A machine-learning photometric classifier for massive stars in nearby galaxies. I. The method
Yang, Ming; Bonanos, Alceste Z.; Maravelias, Grigoris +3 more
Context. Mass loss is a key parameter in the evolution of massive stars. Despite the recent progress in the theoretical understanding of how stars lose mass, discrepancies between theory and observations still hold. Moreover, episodic mass loss in evolved massive stars is not included in models, and the importance of its role in the evolution of m…
The stable climate of KELT-9b
Alonso, R.; Deleuil, M.; Erikson, A. +76 more
Even among the most irradiated gas giants, so-called ultra-hot Jupiters, KELT-9b stands out as the hottest planet thus far discovered with a dayside temperature of over 4500 K. At these extreme irradiation levels, we expect an increase in heat redistribution efficiency and a low Bond albedo owed to an extended atmosphere with molecular hydrogen di…
Hot Jupiters, cold kinematics. High phase space densities of host stars reflect an age bias
Mustill, Alexander J.; Davies, Melvyn B.; Lambrechts, Michiel
Context. The birth environments of planetary systems are thought to influence planet formation and orbital evolution through external photoevaporation and stellar flybys. Recent work has claimed observational support for this, in the form of a correlation between the properties of planetary systems and the local Galactic phase space density of the…