Daniele Viganò
YOU?
Author Swipe
View article: Magnetic, thermal and rotational evolution of isolated neutron stars
Magnetic, thermal and rotational evolution of isolated neutron stars Open
The strong magnetic fields of neutron stars are closely linked to their observed thermal, spectral, and timing properties, such as the distribution of spin periods and their derivatives. To understand the evolution of astrophysical observa…
View article: Rossby Number Regime, Convection Suppression, and Dynamo-generated Magnetism in Inflated Hot Jupiters
Rossby Number Regime, Convection Suppression, and Dynamo-generated Magnetism in Inflated Hot Jupiters Open
Hot Jupiters (HJs) are commonly thought to host the strongest dynamo-generated magnetic fields among exoplanets, up to 1 order of magnitude larger than Jupiter. Thus, they have often been regarded as the most promising exoplanets to displa…
View article: Magnetar outburst models with cooling simulations
Magnetar outburst models with cooling simulations Open
Magnetar outbursts are among the most noteworthy manifestations of magnetism in neutron stars. They are episodes in which the X-ray luminosity of a strongly magnetised neutron star swiftly rises by several orders of magnitude to then decay…
View article: Polarized, variable radio emission from the scallop-shell binary system DG CVn
Polarized, variable radio emission from the scallop-shell binary system DG CVn Open
DG CVn is an eruptive variable star and represents the closest member of the known sample of complex periodic variables, or scallop-shell stars. Over the years, this M dwarf binary system has shown significant flaring activity at a wide ra…
View article: Inflated hot Jupiters: Inferring average atmospheric velocity via Ohmic models coupled with internal dynamo evolution
Inflated hot Jupiters: Inferring average atmospheric velocity via Ohmic models coupled with internal dynamo evolution Open
Aims . The inflated radii observed in hundreds of hot Jupiters (HJ) represent a long-standing open issue. In this study, we quantitatively investigate this phenomenon within the framework of Ohmic dissipation arising from magnetic inductio…
View article: Hot Jupiter dynamos operate in the low Rossby number regime, if they exist
Hot Jupiter dynamos operate in the low Rossby number regime, if they exist Open
In this work, we model the interior evolutionary tracks of inflated hot Jupiters using MESA, a one-dimensional radial code. Guided by observationally constrained flux-heating efficiency relations, we inject heat into the internal layers of…
View article: Planet-induced Modulation of Stellar Activity in an M-Dwarf: Insights into the Magnetism of a Benchmark Warm Neptune
Planet-induced Modulation of Stellar Activity in an M-Dwarf: Insights into the Magnetism of a Benchmark Warm Neptune Open
Interactions between stellar and planetary magnetic fields are expected to produce observable radio and optical signals modulated by their orbital periods, but direct detections remain elusive. Here, we analyze 17 years of spectroscopic da…
View article: Rossby number regime, convection suppression, and dynamo-generated magnetism in inflated hot Jupiters
Rossby number regime, convection suppression, and dynamo-generated magnetism in inflated hot Jupiters Open
Hot Jupiters (HJs) are commonly thought to host the strongest dynamo-generated magnetic fields among exoplanets, up to one order of magnitude larger than Jupiter. Thus, they have often been regarded as the most promising exoplanets to disp…
View article: Synchro-curvature description of γ-ray light curves and spectra of pulsars: concurrent fitting
Synchro-curvature description of γ-ray light curves and spectra of pulsars: concurrent fitting Open
We present a concurrent fitting of spectra and light curves of the whole population of detected gamma-ray pulsars. Using a synchro-curvature model we compare our theoretical output with the observational data published in the Third Fermi P…
View article: Non-ideal MHD simulations of hot Jupiter atmospheres
Non-ideal MHD simulations of hot Jupiter atmospheres Open
In Hot Jupiters (HJs), atmospherically induced magnetic fields are expected to play an important role in controlling the wind circulation and in determining their inflated radii. Here we perform 1D plane-parallel magnetohydrodynamic (MHD) …
View article: Non-ideal MHD simulations of hot Jupiter atmospheres
Non-ideal MHD simulations of hot Jupiter atmospheres Open
In Hot Jupiters (HJs), atmospherically induced magnetic fields are expected to play an important role in controlling the wind circulation and in determining their inflated radii. Here we perform 1D plane-parallel magnetohydrodynamic (MHD) …
View article: A chemically etched D-band waveguide orthomode transducer for CMB measurements
A chemically etched D-band waveguide orthomode transducer for CMB measurements Open
This study presents a prototype D-band waveguide orthomode transducer (OMT) fabricated using chemically etched brass platelets. This method offers a fast, cost-effective, and scalable approach for producing waveguide OMTs above 100 GHz, ma…
View article: A chemically etched D-band waveguide orthomode transducer for CMB measurements
A chemically etched D-band waveguide orthomode transducer for CMB measurements Open
This study presents a prototype D-band waveguide orthomode transducer (OMT) fabricated using chemically etched brass platelets. This method offers a fast, cost-effective, and scalable approach for producing waveguide OMTs above 100 GHz, ma…
View article: Impact of magnetic field gradients on the development of the MRI: Applications to binary neutron star mergers and proto-planetary disks
Impact of magnetic field gradients on the development of the MRI: Applications to binary neutron star mergers and proto-planetary disks Open
The magneto-rotational instability (MRI) is widely believed to play a central role in generating large-scale, poloidal magnetic fields during binary neutron star mergers. However, the few simulations that begin with a weak seed magnetic fi…
View article: Synchro-curvature description of γ-ray light curves and spectra of pulsars: concurrent fitting
Synchro-curvature description of γ-ray light curves and spectra of pulsars: concurrent fitting Open
We present a concurrent fitting of spectra and light curves of the whole population of detected gamma-ray pulsars. Using a synchro-curvature model we compare our theoretical output with the observational data published in the Third Fermi P…
View article: Planetary dynamos in evolving cold gas giants
Planetary dynamos in evolving cold gas giants Open
Context. The discovery of thousands of exoplanets has started a new era of planetary science that expands our ability to characterize diverse planetary features. However, magnetic fields remain one of the least understood aspects of exopla…
View article: First detection of variable radio emission originating from the infant planetary system V1298 Tau
First detection of variable radio emission originating from the infant planetary system V1298 Tau Open
Context. V1298 Tau is a very young and magnetically active K1V star that hosts a benchmark multi-planetary system to study planet formation and evolutionary history at the earliest stages. Thanks to the high interest, it has been the targe…
View article: Planetary Dynamos in Evolving Cold Gas Giants
Planetary Dynamos in Evolving Cold Gas Giants Open
Magnetic fields remain one of the least understood aspects of exoplanetary systems. A deeper understanding of planetary dynamos and the evolution of surface magnetic properties throughout a planet's lifetime is a key scientific purpose, wi…
View article: Hints of auroral and magnetospheric polarized radio emission from the scallop-shell star 2MASS J05082729–2101444
Hints of auroral and magnetospheric polarized radio emission from the scallop-shell star 2MASS J05082729–2101444 Open
Scallop-shell stars, a recently discovered class of young M dwarfs, show complex optical light curves that are characterized by periodic dips as well as other features that are stable over tens to hundreds of rotation cycles. The origin of…
View article: Hints of auroral and magnetospheric polarized radio emission from the scallop-shell star 2MASS J05082729$-$2101444
Hints of auroral and magnetospheric polarized radio emission from the scallop-shell star 2MASS J05082729$-$2101444 Open
Scallop-shell stars, a recently discovered class of young M dwarfs, show complex optical light curves that are characterized by periodic dips as well as other features that are stable over tens to hundreds of rotation cycles. The origin of…
View article: Variable circularly polarized radio emission from the young stellar object [BHB2007]-1: Another ingredient of a unique system
Variable circularly polarized radio emission from the young stellar object [BHB2007]-1: Another ingredient of a unique system Open
The young stellar object [BHB2007]-1 has been extensively studied in the past at radio, millimeter, and infrared wavelengths. It has revealed a gap in the disk and previous observations have claimed possible emission from a sub-stellar obj…
View article: Vorticity and magnetic dynamo from subsonic expansion waves
Vorticity and magnetic dynamo from subsonic expansion waves Open
Context. The amplification of astrophysical magnetic fields takes place via dynamo instability in turbulent environments. Vorticity is usually present in any dynamo, but its role is not yet fully understood. Aims. This work is an extension…
View article: Delayed jet launching in binary neutron star mergers with realistic initial magnetic fields
Delayed jet launching in binary neutron star mergers with realistic initial magnetic fields Open
We analyze a long-lived hyper-massive neutron star merger remnant (post-merger lifetime $>250$ ms) that has been obtained via large eddy simulations with a gradient subgrid-scale model. We find a clear helicoidal magnetic field structure t…
View article: 3D code for MAgneto-Thermal evolution in Isolated Neutron Stars, MATINS: thermal evolution and light curves
3D code for MAgneto-Thermal evolution in Isolated Neutron Stars, MATINS: thermal evolution and light curves Open
The thermal evolution of isolated neutron stars is a key element in unravelling their internal structure and composition and establishing evolutionary connections among different observational subclasses. Previous studies have predominantl…
View article: Constraints on the dense matter equation of state from young and cold isolated neutron stars
Constraints on the dense matter equation of state from young and cold isolated neutron stars Open
Neutron stars are the dense and highly magnetic relics of supernova explosions of massive stars. The quest to constrain the Equation of State (EoS) of ultra-dense matter and thereby probe the behavior of matter inside neutron stars, is one…
View article: Synchro-curvature description of γ-ray light curves and spectra of pulsars: global properties
Synchro-curvature description of γ-ray light curves and spectra of pulsars: global properties Open
This work presents a methodological approach to generate realistic γ-ray light curves of pulsars, resembling reasonably well the observational ones observed by the Fermi-Large Area Telescope (Fermi-LAT) instrument, fitting at the same time…
View article: Synchro-curvature description of $γ$-ray light curves and spectra of pulsars: global properties
Synchro-curvature description of $γ$-ray light curves and spectra of pulsars: global properties Open
This work presents a methodological approach to generate realistic $γ$-ray light curves of pulsars, resembling reasonably well the observational ones observed by the Fermi-Large Area Telescope instrument, fitting at the same time their hig…
View article: The role of Ohmic dissipation of internal currents on Hot Jupiter radii
The role of Ohmic dissipation of internal currents on Hot Jupiter radii Open
The inflated radii observed in hundreds of Hot Jupiters represent a long-standing open issue. The observed correlation between radii and irradiation strength, and the occasional extreme cases, nearly double the size of Jupiter, remain with…
View article: The personalization of psychiatric medium-intensive care: the experience of "Fondazione IRCCS San Gerardo dei Tintori” psychiatric day hospital service
The personalization of psychiatric medium-intensive care: the experience of "Fondazione IRCCS San Gerardo dei Tintori” psychiatric day hospital service Open
View article: Role of turbulence and winding in the development of large-scale, strong magnetic fields in long-lived remnants of binary neutron star mergers
Role of turbulence and winding in the development of large-scale, strong magnetic fields in long-lived remnants of binary neutron star mergers Open
We perform a long and accurate large-eddy simulation of a binary neutron star merger, following the newly formed remnant up to 110 milliseconds. The combination of high-order schemes, high-resolution, and the gradient subgrid-scale model a…