Search Publications
The IACOB project. VII. The rotational properties of Galactic massive O-type stars revisited
Herrero, A.; Simón-Díaz, S.; Barbá, R. H. +1 more
Context. Stellar rotation is of key importance in the formation process, the evolution, and the final fate of massive stars.
Aims: We perform a reassessment of the empirical rotational properties of Galactic massive O-type stars using the results from a detailed analysis of ground-based multi-epoch optical spectra obtained in the framework of…
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc
Baratella, M.; Gilmore, G.; Montes, D. +33 more
Context. The last decade has seen a revolution in our knowledge of the Galaxy thanks to the Gaia and asteroseismic space missions and the ground-based spectroscopic surveys.
Aims: To complete this picture, it is necessary to map the ages of its stellar populations. During recent years, the dependence on time of abundance ratios involving slow…
GIARPS High-resolution Observations of T Tauri stars (GHOsT). IV. Accretion properties of the Taurus-Auriga young association
Munari, U.; Alcalá, J. M.; Manara, C. F. +9 more
Aims: In the framework of the GIARPS High-resolution Observations of T Tauri stars (GHOsT) project, we study the accretion properties of 37 classical T Tauri stars of the Taurus-Auriga star-forming region (SFR) with the aim of characterizing their relation with the properties of the central star, with jets and disk winds, and with the global …
Classical Cepheid period-Wesenheit-metallicity relation in the Gaia bands
Clementini, G.; Ripepi, V.; Molinaro, R. +7 more
Context. Classical Cepheids (DCEPs) represent a fundamental tool to calibrate the extragalactic distance scale. However, they are also powerful stellar population tracers in the context of Galactic studies. The forthcoming Data Release 3 of the Gaia mission will allow us to study, with unprecedented detail, the structure, the dynamics, and the che…
Euclid preparation. XVI. Exploring the ultra-low surface brightness Universe with Euclid/VIS
Altieri, B.; Cimatti, A.; Baccigalupi, C. +181 more
Context. While Euclid is an ESA mission specifically designed to investigate the nature of dark energy and dark matter, the planned unprecedented combination of survey area (∼15 000 deg2), spatial resolution, low sky-background, and depth also make Euclid an excellent space observatory for the study of the low surface brightness Univers…
HADES RV Programme with HARPS-N at TNG. XV. Planetary occurrence rates around early-M dwarfs
Rebolo, R.; Ribas, I.; Morales, J. C. +28 more
Aims: We present the complete Bayesian statistical analysis of the HArps-n red Dwarf Exoplanet Survey (HADES), which monitored the radial velocities of a large sample of M dwarfs with HARPS-N at TNG over the last 6 yr.
Methods: The targets were selected in a narrow range of spectral types from M0 to M3, 0.3 M⊙ < M★
The GAPS Programme at TNG. XXXVII. A precise density measurement of the young ultra-short period planet TOI-1807 b
Baratella, M.; Mallonn, M.; Scandariato, G. +38 more
Context. Great strides have been made in recent years in the understanding of the mechanisms involved in the formation and evolution of planetary systems. Despite this, many observational findings have not yet been corroborated by astrophysical explanations. A fine contribution to the study of planetary formation processes comes from the study of …
Filament coalescence and hub structure in Mon R2. Implications for massive star and cluster formation
Arzoumanian, D.; Palmeirim, P.; Men'shchikov, A. +3 more
There is growing evidence of the role of hub-filament systems (HFS) in the formation of stars from low to high masses. As of today, however, the detailed structures of these systems are still not well described. Here we study the Mon R2 star-forming region, which has a rich network of filaments joining in a star cluster forming hub, and aim to und…
A lensed protocluster candidate at z = 7.66 identified in JWST observations of the galaxy cluster SMACS0723−7327
Dole, H.; Laporte, N.; Zitrin, A. +3 more
Context. According to the current paradigm of galaxy formation, the first galaxies likely formed within large dark matter haloes. The fragmentation of these massive haloes led to the formation of galaxy protoclusters, which are usually composed of one to a few bright objects, surrounded by numerous fainter (and less massive) galaxies. These early …
Stellar metallicity gradients of Local Group dwarf galaxies
Jablonka, P.; Battaglia, G.; Taibi, S. +5 more
Aims: We explore correlations between the strength of metallicity gradients in Local Group dwarf galaxies and their stellar mass, star formation history timescales, and environment.
Methods: We performed a homogeneous analysis of literature spectroscopic data of red giant stars and determined radial metallicity profiles for 30 Local Grou…