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View article: An extremely high-velocity outflow in SMSS J2157-3602, the most luminous quasar in the first 1.3 Gyr
An extremely high-velocity outflow in SMSS J2157-3602, the most luminous quasar in the first 1.3 Gyr Open
We report the discovery of an extremely high-velocity outflow (EHVO) in the most luminous QSO ( L Bol ∼ 2.29 × 10 48 erg/s), named SMSS J2157-3602, at z = 4.692. Combined XSHOOTER and NIRES observations reveal that the EHVO reaches a maxim…
View article: Surface Changes on Io Observed by Large Binocular Telescope/SHARK in Early 2025
Surface Changes on Io Observed by Large Binocular Telescope/SHARK in Early 2025 Open
High spatial resolution images of the volcanic moon Io at visible and near-infrared wavelengths were obtained by the SHARK-VIS and SHARK-NIR instruments on the Large Binocular Telescope on UT 2025 February 18 and 23. Large-scale changes on…
View article: Euclid preparation. Using mock Low Surface Brightness dwarf galaxies to probe Wide Survey detection capabilities
Euclid preparation. Using mock Low Surface Brightness dwarf galaxies to probe Wide Survey detection capabilities Open
Local Universe dwarf galaxies are both cosmological and mass assembly probes. Deep surveys have enabled the study of these objects down to the low surface brightness (LSB) regime. In this paper, we estimate Euclid's dwarf detection capabil…
View article: The Application of Quantum Fourier Transform in Cosmic Microwave Background Data Analysis
The Application of Quantum Fourier Transform in Cosmic Microwave Background Data Analysis Open
The Cosmic Microwave Background (CMB) data analysis and the map-making process rely heavily on the use of spherical harmonics. For suitable pixelizations of the sphere, the (forward and inverse) Fourier transform plays a crucial role in co…
View article: Numerical limits in the integration of Vlasov-Poisson equation for Cold Dark Matter
Numerical limits in the integration of Vlasov-Poisson equation for Cold Dark Matter Open
The Vlasov-Poisson systems of equations (VP) describes the evolution of a distribution of collisionless particles under the effect of a collective-field potential. VP is at the basis of the study of the gravitational instability of cosmolo…
View article: Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS
Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS Open
We report the results from a pilot study to search for black holes and other dark companions in binary systems using direct imaging with SHARK-VIS and the iLocater pathfinder “Lili” on the Large Binocular Telescope. Starting from known sin…
View article: <i>Euclid</i>: Detecting Solar System objects in <i>Euclid</i> images and classifying them using Kohonen self-organising maps
<i>Euclid</i>: Detecting Solar System objects in <i>Euclid</i> images and classifying them using Kohonen self-organising maps Open
The ESA Euclid mission will survey more than 14 000 deg 2 of the sky in visible and near-infrared wavelengths, mapping the extragalactic sky to constrain our cosmological model of the Universe. Although the survey focusses on regions furth…
View article: Benchmarking Quantum Convolutional Neural Networks for Signal Classification in Simulated Gamma-Ray Burst Detection
Benchmarking Quantum Convolutional Neural Networks for Signal Classification in Simulated Gamma-Ray Burst Detection Open
This study evaluates the use of Quantum Convolutional Neural Networks (QCNNs) for identifying signals resembling Gamma-Ray Bursts (GRBs) within simulated astrophysical datasets in the form of light curves. The task addressed here focuses o…
View article: The elderly among the oldest: new evidence for extremely metal-poor RR Lyrae stars
The elderly among the oldest: new evidence for extremely metal-poor RR Lyrae stars Open
We performed a detailed spectroscopic analysis of three extremely metal-poor RR Lyrae stars, exploring uncharted territories at these low metallicities for this class of stars. Using high-resolution spectra acquired with HARPS-N at TNG, UV…
View article: The elderly among the oldest: new evidence for extremely metal-poor RR Lyrae stars
The elderly among the oldest: new evidence for extremely metal-poor RR Lyrae stars Open
We performed a detailed spectroscopic analysis of three extremely metal-poor RR Lyrae stars, exploring uncharted territories at these low metallicities for this class of stars. Using high-resolution spectra acquired with HARPS-N at TNG, UV…
View article: Euclid: Detecting Solar System objects in Euclid images and classifying them using Kohonen self-organising maps
Euclid: Detecting Solar System objects in Euclid images and classifying them using Kohonen self-organising maps Open
The ESA Euclid mission will survey more than 14,000 deg$^2$ of the sky in visible and near-infrared wavelengths, mapping the extra-galactic sky to constrain our cosmological model of the Universe. Although the survey focusses on regions fu…
View article: HYPERION: Broad-band X-ray-to-near-infrared emission of quasars in the first billion years of the Universe
HYPERION: Broad-band X-ray-to-near-infrared emission of quasars in the first billion years of the Universe Open
Aims. We aim to characterize the X-ray-to-optical/near-infrared(NIR) broad-band emission of luminous quasars (QSOs) in the first gigayear (Gyr) of cosmic evolution in order to decipher whether or not they exhibit differences compared to th…
View article: VST-SMASH: the VST Survey of Mass Assembly and Structural Hierarchy
VST-SMASH: the VST Survey of Mass Assembly and Structural Hierarchy Open
The VLT Survey Telescope Survey of Mass Assembly and Structural Hierarchy (VST-SMASH) aims to detect tidal features and remnants around very nearby galaxies, a unique and essential diagnostic of the hierarchical nature of galaxy formation.…
View article: HYPERION: broad-band X-ray-to-near-infrared emission of Quasars in the first billion years of the Universe
HYPERION: broad-band X-ray-to-near-infrared emission of Quasars in the first billion years of the Universe Open
We aim at characterizing the X-ray-to-optical/near-infrared broad-band emission of luminous QSOs in the first Gyr of cosmic evolution to understand whether they exhibit differences compared to the lower-\textit{z} QSO population. Our goal …
View article: Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS
Hidden in Plain Sight: Searching for Dark Companions to Bright Stars with the Large Binocular Telescope and SHARK-VIS Open
We report the results from a pilot study to search for black holes and other dark companions in binary systems using direct imaging with SHARK-VIS and the iLocater pathfinder "Lili" on the Large Binocular Telescope. Starting from known sin…
View article: HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum
HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum Open
One of the main open questions in the field of luminous ($L_{\rm bol}>10^{47}\,\rm erg\,s^{-1}$) quasars (QSOs) at $z \gtrsim 6$ is the rapid formation ($< 1\,$Gyr) of their supermassive black holes (SMBHs). For this work we analysed the r…
View article: HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum
HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum Open
One of the main open questions in the field of luminous ( L bol > 10 47 erg s −1 ) quasars (QSOs) at z ≳ 6 is the rapid formation (< 1 Gyr) of their supermassive black holes (SMBHs). For this work we analysed the relation between the X-ray…
View article: Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey Open
Context. Classical Cepheids (DCEPs) are crucial for calibrating the extragalactic distance ladder, ultimately enabling the determination of the Hubble constant through the period-luminosity ( PL ) and period-Wesenheit ( PW ) relations that…
View article: Pele meets Pillan: &#160;Demonstration of a new method for monitoring surface changes on Io
Pele meets Pillan:  Demonstration of a new method for monitoring surface changes on Io Open
A new development in the field of adaptive optics (AO) on ground-based telescopes enables routine monitoring of changes on Io's surface at scales down to ~80km (achieved), or even down to ~50km (in the limit). Our observations, taken…
View article: Observation of Io's Resurfacing via Plume Deposition Using Ground‐Based Adaptive Optics at Visible Wavelengths With LBT SHARK‐VIS
Observation of Io's Resurfacing via Plume Deposition Using Ground‐Based Adaptive Optics at Visible Wavelengths With LBT SHARK‐VIS Open
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes on Io's surface have been monitored from both spacecraft and ground‐based telescopes. Here, we present the highest spatial resolution images of Io ever…
View article: LBT SHARK-VIS Observes a Major Resurfacing Event on Io
LBT SHARK-VIS Observes a Major Resurfacing Event on Io Open
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes on Io's surface have been monitored from both spacecraft and ground-based telescopes. Here, we present the highest spatial resolution images of Io ever…
View article: Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: VI: Radial abundance gradients of 29 chemical species in the Milky Way Disk
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: VI: Radial abundance gradients of 29 chemical species in the Milky Way Disk Open
Classical Cepheids (DCEPs) are crucial for calibrating the extragalactic distance ladder, ultimately enabling the determination of the Hubble constant through the PL and PW relations they exhibit. Hence it's vital to understand how the PL …
View article: Quantum Convolutional Neural Networks for the detection of Gamma-Ray Bursts in the AGILE space mission data
Quantum Convolutional Neural Networks for the detection of Gamma-Ray Bursts in the AGILE space mission data Open
Quantum computing represents a cutting-edge frontier in artificial intelligence. It makes use of hybrid quantum-classical computation which tries to leverage quantum mechanic principles that allow us to use a different approach to deep lea…
View article: Chasing the Break: Tracing the Full Evolution of a Black Hole X-Ray Binary Jet with Multiwavelength Spectral Modeling
Chasing the Break: Tracing the Full Evolution of a Black Hole X-Ray Binary Jet with Multiwavelength Spectral Modeling Open
Black hole (BH) X-ray binaries (XRBs) are ideal targets to study the connection between accretion inflow and jet outflow. Here we present quasi-simultaneous, multiwavelength observations of the Galactic BH system MAXI J1820+070, throughout…
View article: Software architecture and development approach for the ASTRI Mini-Array project at the Teide Observatory
Software architecture and development approach for the ASTRI Mini-Array project at the Teide Observatory Open
The Astrophysics with Italian Replicating Technology Mirrors (ASTRI) Mini-Array is an international collaboration led by the Italian National Institute for Astrophysics (INAF) and devoted to imaging atmospheric Cherenkov light for very-hig…
View article: Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey Open
Context. The highly debated effect of metallicity on the absolute magnitudes of classical Cepheid variables needs to be properly quantified for determining accurate and precise distances based on their Leavitt Law. Aims. Our goal is to obt…
View article: Cepheid Metallicity in the Leavitt Law (C-MetaLL) Survey. V. New multiband (grizJHKs) Cepheid light curves and period-luminosity relations
Cepheid Metallicity in the Leavitt Law (C-MetaLL) Survey. V. New multiband (grizJHKs) Cepheid light curves and period-luminosity relations Open
We present homogeneous multiband (grizJHKs) time-series observations of 78 Cepheids including 49 fundamental mode variables and 29 first-overtone mode variables. These observations were collected simultaneously using the ROS2 and REMIR ins…
View article: Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey Open
Context. Classical Cepheids (DCEPs) play a fundamental role in the calibration of the extragalactic distance ladder, which eventually leads to the determination of the Hubble constant ( H 0 ) thanks to the period–luminosity (PL) and period…
View article: Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: IV. The metallicity dependence of Cepheid Period-Luminosity relations
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: IV. The metallicity dependence of Cepheid Period-Luminosity relations Open
Classical Cepheids (DCEPs) play a fundamental role in the calibration of the extra-galactic distance ladder which eventually leads to the determination of the Hubble constant($H_0$) thanks to the period-luminosity ($PL$) and period-Wesenhe…
View article: HYPerluminous quasars at the Epoch of ReionizatION (HYPERION): A new regime for the X-ray nuclear properties of the first quasars
HYPerluminous quasars at the Epoch of ReionizatION (HYPERION): A new regime for the X-ray nuclear properties of the first quasars Open
The existence of luminous quasars (QSOs) at the epoch of reionization (EoR; i.e., z > 6) powered by well-grown supermassive black holes (SMBHs) with masses ≳10 9 M ⊙ challenges models of early SMBH formation and growth. To shed light on th…