Search Publications
Constraining the top-light initial mass function in the extended ultraviolet disk of M 83
Knapen, J. H.; Comerón, S.; Venhola, A. +3 more
Context. The universality or non-universality of the initial mass function (IMF) has significant implications for determining star formation rates and star formation histories from photometric properties of stellar populations.
Aims: We reexamine whether the IMF is deficient in high-mass stars (top-light) in the low-density environment of the…
Asteroid reflectance spectra from Gaia DR3: Near-UV in primitive asteroids
Tatsumi, E.; Tanga, P.; Licandro, J. +4 more
Context. In the context of charge-coupled devices (CCDs), the ultraviolet (UV) region has mostly remained unexplored after the 1990s. Gaia DR3 offers the community a unique opportunity to explore tens of thousands of asteroids in the near-UV as a proxy of the UV absorption. This absorption has been proposed in previous works as a diagnostic of hyd…
Catalogue of BRITE-Constellation targets. I. Fields 1 to 14 (November 2013-April 2016)
Smolec, R.; Handler, G.; Wade, G. A. +25 more
Context. The BRIght Target Explorer (BRITE) mission collects photometric time series in two passbands with the aim of investigating stellar structure and evolution. Since their launches in the years 2013 and 2014, the constellation of five BRITE nano-satellites has observed a total of more than 700 individual bright stars in 64 fields. Some target…
Radial velocities from Gaia BP/RP spectra
Kuijken, Konrad; Koposov, Sergey E.; Verberne, Sill +3 more
Aims: The Gaia mission has provided us full astrometric solutions for over 1.5B sources. However, only the brightest 34M of them have radial velocity measurements. This paper aims to close that gap by obtaining radial velocity estimates from the low-resolution BP/RP spectra that Gaia now provides. These spectra are currently published for abo…
Double red giant branch and red clump features of Galactic disc stellar populations with Gaia GSP-Spec
Recio-Blanco, A.; de Laverny, P.; Palicio, P. A. +4 more
Context. The bimodality of the Milky Way disc, in the form of a thick short disc and a thinner more radially extended one, encrypts the complex internal evolution of our Galaxy and its interaction with the environment. Aims. To disentangle the different competing physical processes at play in Galactic evolution, a detailed chrono-chemical-kinemati…
Evaporation ages: A new dating method for young star clusters
Miret-Roig, N.; Pelkonen, V. -M.; Padoan, P.
Context. The ages of young star clusters are fundamental clocks to constrain the formation and evolution of pre-main-sequence stars and their protoplanetary disks and exoplanets. However, dating methods for very young clusters often disagree, casting doubts on the accuracy of the derived ages.
Aims: We propose a new method to derive the kinem…
Faraday tomography of LoTSS-DR2 data. II. Multi-tracer analysis in the high-latitude outer Galaxy
Soler, Juan D.; Haverkorn, Marijke; Turić, Luka +4 more
Context. We conducted a follow-up study on the analysis of the LOw Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) mosaic in the high-latitude outer Galaxy presented in the first paper of this series. Here, we focus on the search for alignment between the magnetic field traced by dust, HI filaments, starlight optical linear polarisation, and …
Combining STEREO heliospheric imagers and Solar Orbiter to investigate the evolution of the 2022 March 10 CME
Farrugia, C. J.; Galvin, A. B.; Davies, E. E. +7 more
Context. Coronal mass ejections (CMEs) are large-scale structures of magnetized plasma that erupt from the corona into interplanetary space. The launch of Solar Orbiter (SolO) in 2020 enables in situ measurements of CMEs in the innermost heliosphere, at such distances where CMEs can be observed remotely within the inner field of view of heliospher…
Characterisation of the TOI-421 planetary system using CHEOPS, TESS, and archival radial velocity data
Alonso, R.; Deleuil, M.; Erikson, A. +88 more
Context. The TOI-421 planetary system contains two sub-Neptune-type planets (Pb ~ 5.2 days, Teq,b ~ 900 K, and Pc ~ 16.1 days, Teq,c ~ 650 K) and is a prime target to study the formation and evolution of planets and their atmospheres. The inner planet is especially interesting as the existence…
Running with the bulls: The frequency of star-disc encounters in the Taurus star-forming region
Benisty, Myriam; Joncour, Isabelle; Winter, Andrew J. +5 more
Context. Stars and planets form in regions of enhanced stellar density, subjecting protoplanetary discs to gravitational perturbations from neighbouring stars. Observations in the Taurus star-forming region have uncovered evidence of at least three recent, star-disc encounters that have truncated discs (HV/DO Tau, RW Aurigae, and UX Tau), raising …