Search Publications
JWST imaging of the closest globular clusters: IV. Chemistry, luminosity, and mass functions of the lowest-mass members in the NIRISS parallel fields
Salaris, M.; Apai, D.; Anderson, J. +9 more
We present observations of the two closest globular clusters, NGC 6121 and NGC 6397, taken with the NIRISS detector of JWST. The combination of our new JWST data with archival Hubble Space Telescope (HST) images allows us to compute proper motions, disentangle cluster members from field objects, and probe the main sequence (MS) of the clusters dow…
The Galactic bulge exploration. II. Line-of-sight velocity templates for single-mode RR Lyrae stars
Smolec, R.; Prudil, Z.; Kunder, A. +2 more
We present a new set of tools to derive systemic velocities for single-mode RR Lyrae stars from visual and near-infrared spectra. We derived scaling relations and line-of-sight velocity templates using both APOGEE and Gaia spectroscopic products combined with photometric G-band amplitudes. We provide a means to estimate systemic velocities for the…
A global view on star formation: The GLOSTAR Galactic plane survey: XI. Radio source catalog IV: 2° < ℓ < 28°, 36° < ℓ < 60° and |b| < 1°
Menten, K. M.; Khan, S.; Csengeri, T. +17 more
Context. The GLObal view on STAR formation in the Milky Way (GLOSTAR) survey studies star formation with the Very Large Array (VLA) and the Effelsberg 100 meter radio telescope in the Galactic plane between ‑2° < ℓ < 60° and |b| < 1°, and the Cygnus X region (76° < ℓ < 83° and ‑1° < b < 2°), with unprecedented sensitivity in b…
Dynamics and potential origins of decimeter-sized particles around comet 67P/Churyumov-Gerasimenko
Agarwal, Jessica; Grieger, Björn; Marschall, Raphael +2 more
Context. One of the primary goals of the European Space Agency's Rosetta mission to comet 67P/Churyumov-Gerasimenko was to investigate the mechanisms responsible for cometary activity.
Aims: Our aim is to learn more about the ejection process of large refractory material by studying the dynamics of decimeter-sized dust particles in the coma o…
Using autoencoders and deep transfer learning to determine the stellar parameters of 286 CARMENES M dwarfs
Caballero, J. A.; Montes, D.; Passegger, V. M. +9 more
Context. Deep learning (DL) techniques are a promising approach among the set of methods used in the ever-challenging determination of stellar parameters in M dwarfs. In this context, transfer learning could play an important role in mitigating uncertainties in the results due to the synthetic gap (i.e. difference in feature distributions between …
Phobos photometric properties from Mars Express HRSC observations
Barucci, M. A.; Fornasier, S.; Matz, K. -D. +5 more
Aims: This study aims to analyze Phobos' photometric properties using Mars Express mission observations to support the Martian Moons exploration mission (MMX) devoted to the investigation of the Martian system and to the return of Phobos samples.
Methods: We analyzed resolved images of Phobos acquired between 2004 and 2022 by the High Re…
The galactic acceleration scale is imprinted on globular cluster systems of early-type galaxies of most masses and on red and blue globular cluster subpopulations
Hilker, Michael; Richtler, Tom; Renaud, Florent +3 more
Context. Globular clusters (GCs) carry information about the formation histories and gravitational fields of their host galaxies. It was found before that the radial profiles of the volume number density of GCs in GC systems (GCSs) follow broken power laws, while the breaks occur approximately at the a0 radii. These are the radii at whi…
Mind the gap between A2061 and A2067: Unveiling new diffuse, large-scale radio emission
Brunetti, G.; Balboni, M.; Venturi, T. +11 more
Aims. The clusters Abell 2061 and Abell 2067 in the Corona Borealis supercluster have been studied at different radio frequencies and are both known to host diffuse radio emission. The aim of this work is to investigate the radio emission between them, whose presence is suggested by low-resolution observations. Methods. We analysed deep LOw Freque…
Probing the filamentary nature of star formation in the California giant molecular cloud
André, Philippe; Zhang, Guo-Yin; Li, Jin-Zeng +1 more
Context. Recent studies suggest that filamentary structures are representative of the initial conditions of star formation in molecular clouds and support a filament paradigm for star formation, potentially accounting for the origin of the stellar initial mass function (IMF). The detailed, local physical properties of molecular filaments remain po…
Imprint of the magnetic activity cycle on solar asteroseismic characterisation based on 26 years of GOLF and BiSON data
Bétrisey, J.; Farnir, M.; García, R. A. +4 more
Context. Asteroseismic modelling will play a key role in future space-based missions, such as PLATO, CubeSpec, and Roman. Despite remarkable achievements, asteroseismology has revealed significant discrepancies between observations and theoretical predictions of the physics used in stellar models, which have the potential to bias stellar character…