Search Publications
Global survey of star clusters in the Milky Way. VII. Tidal parameters and mass function
Kovaleva, D. A.; Piskunov, A. E.; Just, A. +2 more
Aims: We built Galactic open star cluster mass functions (CMFs) for different age sub-samples and spatial locations in the wider solar neighbourhood. Here, we present a simple cluster formation and evolution model to reproduce the main features of the CMFs.
Methods: We used an unbiased working sample of 2227 clusters of the Milky Way Sta…
Ultracool dwarfs in Gaia DR3
Recio-Blanco, A.; de Laverny, P.; Bailer-Jones, C. A. L. +36 more
Context. Previous Gaia data releases offered the opportunity to uncover ultracool dwarfs (UCDs) through astrometric, rather than purely photometric, selection. The most recent, the third data release (DR3), offers in addition the opportunity to use low-resolution spectra to refine and widen the selection.
Aims: In this work we use the Gaia DR…
How the origin of stars in the Galaxy impacts the composition of planetary building blocks
Diakite, S.; Lagarde, N.; Guilbert-Lepoutre, A. +2 more
Context. Our Galaxy is composed of different stellar populations with varying chemical abundances, which are thought to imprint the composition of planet building blocks (PBBs). As such, the properties of stars should affect the properties of planets and small bodies formed in their systems. In this context, high-resolution spectroscopic surveys o…
Compact jets dominate the continuum emission in low-luminosity active galactic nuclei
Fernández-Ontiveros, J. A.; Prieto, A.; López-López, X.
Low-luminosity active galactic nuclei (LLAGN) are special among their kind due to the profound structural changes that the central engine experiences at low accretion rates (≲ 10−3 in Eddington units). The disappearance of the accretion disc - the blue bump - leaves behind a faint optical nuclear continuum whose nature has been largely …
Observations of neutral carbon in 29 high-z lensed dusty star-forming galaxies and the comparison of gas mass tracers
Weiss, A.; Greve, T. R.; Vieira, J. D. +10 more
Context. The nature and evolution of high-redshift dusty star-forming galaxies (high-z DSFGs) remain open questions. Their massive gas reservoirs play an important role in driving the intense star formation rates hosted in these galaxies.
Aims: Our aim is to estimate the molecular gas content of high-z DSFGs by using various gas mass tracers,…
Temperature of quiet Sun small scale brightenings observed by EUI on board Solar Orbiter: Evidence for a cooler component
Mierla, M.; Zhukov, A. N.; Berghmans, D. +16 more
Context. On May 30, 2020, small and short-lived extreme-UV (EUV) brightenings in the quiet Sun were observed over a four-minute sequence by the EUV channel of the Extreme Ultraviolet Imager - High Resolution Imager (EUIHRIEUV) on board the Solar Orbiter. The brightenings' physical origin and possible impact on coronal or transition regi…
High-mass eclipsing binaries: A testbed for models of interior structure and evolution. Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car, and V346 Cen
Southworth, J.; Tkachenko, A.; Van Reeth, T. +2 more
Aims: The surface chemical compositions of stars are affected by physical processes that bring the products of thermonuclear burning to the surface. Despite their potential in helping us understand the structure and evolution of stars, elemental abundances are available for only a few high-mass binary stars. We aim to enlarge this sample by d…
GMP-selected dual and lensed AGNs: Selection function and classification based on near-IR colors and resolved spectra from VLT/ERIS, Keck/OSIRIS, and LBT/LUCI
Sturm, E.; Marconi, A.; Vignali, C. +44 more
The Gaia Multipeak (GMP) technique can be used to identify large numbers of dual or lensed active galactic nucleus (AGN) candidates at subarcsec separation, allowing us to study both multiple supermassive black holes (SMBHs) in the same galaxy and rare, compact lensed systems. The observed samples can be used to test the predictions of the models …
Ongoing hierarchical massive cluster assembly: The LISCA II structure in the Perseus complex
Dalessandro, E.; Bellazzini, M.; Sanna, N. +7 more
We report on the identification of a massive (∼105 M⊙) substructured stellar system in the Galactic Perseus complex likely undergoing hierarchical cluster assembly. This system comprises nine star clusters (including the well-known clusters NGC 654 and NGC 663) and an extended and low-density stellar halo. Gaia-DR3 and availa…
Debris disk color with the Hubble Space Telescope
Debes, John H.; Roberge, Aki; Schneider, Glenn +14 more
Context. Multiwavelength scattered light imaging of debris disks may inform dust properties including typical size and mineral composition. Existing studies have investigated a small set of individual systems across a variety of imaging instruments and filters, calling for uniform comparison studies to systematically investigate dust properties. <…