29 citations · 133 across the 13 of their papers we have counts for
11 papers · 1 filter
On the Temporal Variability in the Magnetic Dichotomy of Late M Dwarf Stars
Giuseppina Nigro, Francesco Berrilli, Giuseppe Bono +4
Rapidly rotating late M dwarfs are observed in two different branches of magnetic activity, although they operate in the same stellar parameter range. Current empirical evidence in…
Modeling Decadal and Centennial Solar UV Irradiance Changes
Raffaele Reda, Valentina Penza, Serena Criscuoli +5
Reconstructions of solar spectral irradiance - especially in the ultraviolet (UV) range - are crucial for understanding Earth's climate system. Although total solar irradiance (TSI…
Investigating the Temperature Sensitivity of UV Line Ratios in the 280 nm Region of Solar-like Stars
Valentina Penza, Serena Criscuoli, Raffaele Reda +7
Stellar UV spectra are fundamental diagnostics of physical and magnetic properties of stars. For instance, lines like Mg II at 280 nm serve as valuable indicators of stellar activi…
Reconstruction of the Total Solar Irradiance during the last Millenium
Valentina Penza, Luca Bertello, Matteo Cantoresi +5
Solar irradiance variations across various timescales, from minutes to centuries, represents a potential natural driver of past regional and global climate cold phases. To accurate…
The Ca II K index-Mg II index relation: A Hilbert-Huang Transform approach
Raffaele Reda, Valentina Penza
The solar activity, which is driven by a variable magnetic field, exhibits changes along several time scales, the 11-year being the most known. In addition to the SunSpot Number, t…
Total Solar Irradiance during the Last Five Centuries
V. Penza, F. Berrilli, L. Bertello +3
The total solar irradiance (TSI) varies on timescales of minute to centuries. On short timescales it varies due to the superposition of intensity fluctuations produced by turbulent…
The exoplanetary magnetosphere extension in Sun-like stars based on the solar wind -- solar UV relation
Raffaele Reda, Luca Giovannelli, Tommaso Alberti +6
The Earth's magnetosphere extension is controlled by the solar activity level via solar wind properties. Understanding such a relation in the Solar System is important for predicti…
Prediction of sunspot and plage coverage for Solar Cycle 25
Valentina Penza, Francesco Berrilli, Luca Bertello +2
Solar variability occurs over a broad range of spatial and temporal scales, from the Sun's brightening over its lifetime to the fluctuations commonly associated with magnetic activ…
The correlation of synthetic UV color vs Mg II index along the solar cycle
Serena Criscuoli, Valentina Penza, Mija Lovric +1
Modeling of planets' climate and habitability requires as fundamental input the UV emission of the hosting star. \citet{lovric2017} employed SORCE/SOLSTICE solar observations to in…
N-body model of magnetic flux tubes reconnecting in the solar atmosphere
Luca Giovannelli, Francesco Berrilli, Dario Del Moro +7
The investigation of dynamics of the small scale magnetic field on the Sun photosphere is necessary to understand the physical processes occurring in the higher layers of solar atm…
2D solar modeling
P. Ventura, V. Penza, L. Li +3
Understanding the reasons of the cyclic variation of the total solar irradiance is one of the most challenging targets of modern astrophysics. These studies prove to be essential a…