Search Publications
Hubble Asteroid Hunter. I. Identifying asteroid trails in Hubble Space Telescope images
Popescu, Marcel; de Marchi, Guido; Merín, Bruno +11 more
Context. Large and publicly available astronomical archives open up new possibilities to search for and study Solar System objects. However, advanced techniques are required to deal with the large amounts of data. These unbiased surveys can be used to constrain the size distribution of minor bodies, which represents a piece of the puzzle for the f…
Unveiling the nature of 12 new low-luminosity Galactic globular cluster candidates
Minniti, D.; Ripepi, V.; Saito, R. K. +10 more
Context. The Galactic globular cluster system is incompletely known, especially in the low-latitude regions of the Galactic bulge and disk. We report the physical characterisation of 12 star clusters in the Milky Way, most of which are explored here for the first time.
Aims: Our primary aim is determining their main physical parameters, such …
The Influence Of Individual Stars On The long-Term Dynamics Of Comets C/2014 UN271 And C/2017 K2
Dybczyński, Piotr A.; Królikowska, Małgorzata
Context. In June 2021, the discovery of an unusual comet C/2014 UN271 (Bernardinelli-Bernstein) was announced. Its cometary activity beyond the orbit of Uranus has also refreshed interest in similar objects, including C/2017 K2 (PANSTARRS). Another peculiarity of these objects is the long interval of positional data, taken at large heli…
Physics of ULIRGs with MUSE and ALMA: The PUMA project. III. Incidence and properties of ionised gas disks in ULIRGs, associated velocity dispersion, and its dependence on starburstiness
Maiolino, R.; Colina, L.; Perna, M. +11 more
Context. A classical scenario suggests that ultra-luminous infrared galaxies (ULIRGs) transform colliding spiral galaxies into a spheroid-dominated early-type galaxy. Recent high-resolution simulations have instead shown that, under some circumstances, rotation disks can be preserved during the merging process or rapidly regrown after coalescence.…
The Lyman Alpha Reference Sample. XII. Morphology of extended Lyman alpha emission in star-forming galaxies
Östlin, G.; Hayes, M.; Kunth, D. +7 more
Aims: We use Hubble Space Telescope data of 45 nearby star-forming galaxies to investigate properties of Lyman-alpha (Lyα) halos, Lyα morphology, and the star-forming characteristics of galaxies. We study how the morphology of Lyα emission is related to other Lyα observables. Furthermore, we study the interdependencies of Lyα morphological qu…
Occurrence and statistics of IRIS bursts
Kleint, Lucia; Panos, Brandon
Small reconnection events in the lower solar atmosphere can lead to its heating, but whether such heating can propagate into higher atmospheric layers and potentially contribute to coronal heating is an open question. We carry out a large statistical analysis of all IRIS observations from 2013 and 2014. We identified "IRIS burst" (IB) spectra usin…
APOGEE-2S view of the globular cluster Patchick 125 (Gran 3). New metallicity and elemental abundances from high-resolution spectroscopy
Minniti, Dante; Fernández-Trincado, José G.; Villanova, Sandro +1 more
We present detailed elemental abundances, radial velocity, and orbital elements for Patchick 125, a recently discovered metal-poor globular cluster (GC) in the direction of the Galactic bulge. Near-infrared high-resolution (R ∼ 22 500) spectra of two members were obtained during the second phase of the Apache Point Observatory Galactic Evolution E…
Unveiling the past evolution of the progenitor of the Helmi streams
Helmi, A.; Cassisi, S.; Gallart, C. +2 more
Aims: We aim to determine unique features that characterise the past evolution of the progenitor of the Helmi streams through the analysis of star formation histories (SFHs).
Methods: From the 5D Gaia EDR3 dataset, we extracted local samples of stars dominated by the Helmi streams, the Galactic (thick and thin) disc, and the local retrog…
The super-soft source phase of the recurrent nova V3890 Sgr
Ness, J. -U.; Pinto, C.; Singh, K. P. +9 more
Context. The 30-yr recurrent symbiotic nova V3890 Sgr exploded on 2019 August 28 and was observed with multiple X-ray telescopes. Swift and AstroSat monitoring revealed slowly declining hard X-ray emission from shocks between the nova ejecta and the stellar wind of the companion. Later, highly variable super-soft-source (SSS) emission was seen. An…
V456 Cyg: An eclipsing binary with tidally perturbed g-mode pulsations
Southworth, J.; Bowman, D. M.; Van Reeth, T. +1 more
Context. Many well-known bright stars have been observed by the ongoing transiting exoplanet survey satellite (TESS) space mission. For several of them, these new data reveal previously unobserved variability, such as tidally perturbed pulsations in close binary stars.
Aims: Using newly detected gravity-mode (g-mode) pulsations in V456 Cyg, w…