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Gamma-Ray Burst Light-curve Reconstruction: A Comparative Machine and Deep Learning Analysis Open
Gamma-ray bursts (GRBs), observed at high- z , are probes of the evolution of the Universe and can be used as cosmological tools. Thus, we need correlations with small dispersion among key parameters. To reduce such a dispersion, we mitiga…
View article: POLAR-2 – Latest Developments of the Next Generation GRB Polarimeter
POLAR-2 – Latest Developments of the Next Generation GRB Polarimeter Open
Gamma-Ray Bursts (GRBs) are among the most energetic events in the Universe. Despite over 50 years of research and measurements their prompt emission remains poorly understood, with key questions surrounding the structure of relativistic j…
The Machine learning to reconstruct GRB lightcurves Open
The current knowledge in cosmology deals with open problems whose solutions are still under investigation. The main issue is the so-called Hubble constant ($H_0$) tension, namely, the $4-6 \sigma$ discrepancy between the local value of $H_…
View article: Gamma-ray burst polarimetry with the POLAR and POLAR-2 missions
Gamma-ray burst polarimetry with the POLAR and POLAR-2 missions Open
Gamma-Ray Bursts are among the most powerful and violent events in the Universe. Despite over half a century of observations of these transient sources, many open questions remain about their nature and the physical emission mechanisms at …
View article: Multi-Model Framework for Reconstructing Gamma-Ray Burst Light Curves
Multi-Model Framework for Reconstructing Gamma-Ray Burst Light Curves Open
Mitigating data gaps in Gamma-ray bursts (GRBs) light curves (LCs) is crucial for cosmological research, enhancing the precision of parameters, assuming perfect satellite conditions for complete LC coverage with no gaps. This analysis impr…
View article: Automated quasar continuum estimation using neural networks
Automated quasar continuum estimation using neural networks Open
Context . Ongoing and upcoming large spectroscopic surveys are drastically increasing the number of observed quasar spectra, making the development of fast and accurate automated methods to estimate spectral continua necessary. Aims . This…
Gamma-ray burst redshift estimation using machine learning and the associated web app Open
Context . Gamma-ray bursts (GRBs), which have been observed at redshifts as high as 9.4, could serve as valuable probes for investigating the distant Universe. However, using them in this manner necessitates an increase in the number of GR…
View article: Acqua Sorgente a nationwide citizen science project to monitor and study the Italian water springs
Acqua Sorgente a nationwide citizen science project to monitor and study the Italian water springs Open
Groundwater is the most abundant reservoir of available freshwater and both communities and ecosystems are strongly dependent on it. In Europe, groundwater abstraction accounts for more than half of all tapped water.Water springs are the s…
View article: GRB Redshift Classifier to Follow up High-redshift GRBs Using Supervised Machine Learning
GRB Redshift Classifier to Follow up High-redshift GRBs Using Supervised Machine Learning Open
Gamma-ray bursts (GRBs) are intense, short-lived bursts of gamma-ray radiation observed up to a high redshift ( z ∼ 10) due to their luminosities. Thus, they can serve as cosmological tools to probe the early Universe. However, we need a l…
View article: Investigating the redshift evolution of lensing galaxy density slopes via model-independent distance ratios
Investigating the redshift evolution of lensing galaxy density slopes via model-independent distance ratios Open
Context. Strong-lensing systems are expected to be discovered in great numbers by next-generation surveys. They provide a powerful tool for studying cosmology and the galaxy evolution. The coupling of the galaxy structure and cosmology thr…
The Machine Learning to reconstruct GRB lightcurves Open
The current knowledge in cosmology deals with open problems whose solutions are still under investigation. The main issue is the so-called Hubble constant ($H_0$) tension, namely, the $4-6 σ$ discrepancy between the local value of $H_0$ ob…
View article: Investigating the Redshift Evolution of Lensing Galaxy Density Slopes via Model-Independent Distance Ratios
Investigating the Redshift Evolution of Lensing Galaxy Density Slopes via Model-Independent Distance Ratios Open
Strong lensing systems, expected to be abundantly discovered by next-generation surveys, offer a powerful tool for studying cosmology and galaxy evolution. The connection between galaxy structure and cosmology through distance ratios highl…
GRB Redshift Estimation using Machine Learning and the Associated Web-App Open
Context. Gamma-ray bursts (GRBs), observed at redshifts as high as 9.4, could serve as valuable probes for investigating the distant Universe. However, this necessitates an increase in the number of GRBs with determined redshifts, as curre…
View article: GRB Redshift Classifier to Follow-up High-Redshift GRBs Using Supervised Machine Learning
GRB Redshift Classifier to Follow-up High-Redshift GRBs Using Supervised Machine Learning Open
Gamma-ray bursts (GRBs) are intense, short-lived bursts of gamma-ray radiation observed up to a high redshift ($z \sim 10$) due to their luminosities. Thus, they can serve as cosmological tools to probe the early Universe. However, we need…
View article: Response of the first POLAR-2 prototype to polarized beams
Response of the first POLAR-2 prototype to polarized beams Open
POLAR-2 is a dedicated gamma-ray polarimeter currently foreseen to be launched towards the China Space Station around 2027. The design of the detector is based on the legacy of its predecessor mission POLAR which was launched in 2016. POLA…
View article: TEGLIE: Transformer encoders as strong gravitational lens finders in KiDS
TEGLIE: Transformer encoders as strong gravitational lens finders in KiDS Open
Context. With the current and upcoming generation of surveys, such as the Legacy Survey of Space and Time (LSST) on the Vera C. Rubin Observatory and the Euclid mission, tens of billions of galaxies will be observed, with a significant por…
Gamma-Ray Bursts as Distance Indicators by a Statistical Learning Approach Open
Gamma-ray bursts (GRBs) can be probes of the early Universe, but currently, only 26% of GRBs observed by the Neil Gehrels Swift Observatory have known redshifts ( z ) due to observational limitations. To address this, we estimated the GRB …
Halo Asymmetry in the Modeling of Galaxy Clustering Open
Conventional studies of galaxy clustering within the framework of halo models typically assume that the density profile of all dark matter halos can be approximated by the Navarro–Frenk–White (NFW) spherically symmetric profile. However, b…
View article: The quiescent population at 0.5 ≤ <i>z</i> ≤ 0.9: Environmental impact on the mass–size relation
The quiescent population at 0.5 ≤ <i>z</i> ≤ 0.9: Environmental impact on the mass–size relation Open
Context. How the quiescent galaxies evolve with redshift and the factors that impact their evolution are still debated. It is still unclear what the dominant mechanisms of passive galaxy growth are and what role is played by the environmen…
View article: The quiescent population at $0.5\le z \le 0.9$: Environmental impact on the mass-size relation
The quiescent population at $0.5\le z \le 0.9$: Environmental impact on the mass-size relation Open
How the quiescent galaxies evolve with redshift and the factors that impact their evolution are still debated. It is still unclear what the dominant mechanisms of passive galaxy growth are and what role is played by the environment in shap…
Halo asymmetry in the modelling of galaxy clustering Open
Conventional studies of galaxy clustering within the framework of halo models typically assume that the density profile of all dark matter haloes can be approximated by the Navarro-Frenk-White (NFW) spherically symmetric profile. However, …
View article: Effects of galaxy environment on merger fraction
Effects of galaxy environment on merger fraction Open
Aims. In this work we examine how environment influences the merger fraction, from the low density field environment to higher density groups and clusters. We also study how the properties of a group or cluster, as well as the position of …
View article: Do galaxy mergers prefer under-dense environments?
Do galaxy mergers prefer under-dense environments? Open
Context. Galaxy mergers play a crucial role in galaxy evolution. However, the correlation between mergers and the local environment of galaxies is not fully understood. Aims. We aim to address the question of whether galaxy mergers prefer …
Inferring the Redshift of More than 150 GRBs with a Machine-learning Ensemble Model Open
Gamma-ray bursts (GRBs), due to their high luminosities, are detected up to a redshift of 10, and thus have the potential to be vital cosmological probes of early processes in the Universe. Fulfilling this potential requires a large sample…
Gamma-ray Bursts as Distance Indicators by a Statistical Learning Approach Open
Gamma-ray bursts (GRBs) can be probes of the early universe, but currently, only 26% of GRBs observed by the Neil Gehrels Swift Observatory GRBs have known redshifts ($z$) due to observational limitations. To address this, we estimated the…
View article: Attenuation proxy hidden in surface brightness – colour diagrams
Attenuation proxy hidden in surface brightness – colour diagrams Open
Aims. Large future sky surveys, such as the Legacy Survey of Space and Time ( LSST ), will provide optical photometry for billions of objects. Reliable estimation of the physical properties of galaxies requires information about dust atten…
View article: Attenuation proxy hidden in surface brightness-colour diagrams. A new strategy for the LSST era
Attenuation proxy hidden in surface brightness-colour diagrams. A new strategy for the LSST era Open
Large future sky surveys, such as the LSST, will provide optical photometry for billions of objects. This paper aims to construct a proxy for the far ultraviolet attenuation (AFUVp) from the optical data alone, enabling the rapid estimatio…
View article: A comparative study of the fundamental metallicity relation
A comparative study of the fundamental metallicity relation Open
Aims. We aim to investigate the influences on the evolution of the fundamental metallicity relation of different selection criteria. Methods. We used 5 487 star-forming galaxies at a median redshift of z ≈ 0.63 extracted from the VIMOS Pub…
Inferring the redshift of more than 150 GRBs with a Machine Learning Ensemble model Open
Gamma-Ray Bursts (GRBs), due to their high luminosities are detected up to redshift 10, and thus have the potential to be vital cosmological probes of early processes in the universe. Fulfilling this potential requires a large sample of GR…