443 citations · 2.3k across the 68 of their papers we have counts for
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The role of turbulence and winding in the development of large-scale, strong magnetic fields in long-lived remnants of binary neutron star mergers
Ricard Aguilera-Miret, Carlos Palenzuela, Federico Carrasco +1
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 schem…
3D evolution of neutron star magnetic-fields from a realistic core-collapse turbulent topology
Clara Dehman, Daniele Viganò, Stefano Ascenzi +2
We present the first 3D fully coupled magneto-thermal simulations of neutron stars (including the most realistic background structure and microphysical ingredients so far) applied…
How bright can old magnetars be? Assessing the impact of magnetized envelopes and field topology on neutron star cooling
Clara Dehman, José A. Pons, Daniele Viganò +1
Neutron stars cool down during their lifetime through the combination of neutrino emission from the interior and photon cooling from the surface. Strongly magnetised neutron stars,…
Constraining the nature of the 18-min periodic radio transient GLEAM-X J162759.5-523504.3 via multi-wavelength observations and magneto-thermal simulations
N. Rea, F. Coti Zelati, C. Dehman +13
We observed the periodic radio transient GLEAM-X J162759.5-523504.3 (GLEAM-X J1627) using the Chandra X-ray Observatory for about 30-ks on January 22-23, 2022, simultaneously with…
3D code for MAgneto-Thermal evolution in Isolated Neutron Stars, MATINS: The Magnetic Field Formalism
Clara Dehman, Daniele Viganò, José A. Pons +1
The long-term evolution of the internal, strong magnetic fields of neutron stars needs a specific numerical modelling. The diversity of the observed phenomenology of neutron stars…
Relativistic force-free models of the thermal X-ray emission in millisecond pulsars observed by NICER
Federico Carrasco, Joaquin Pelle, Oscar Reula +2
Several important properties of rotation-powered millisecond pulsars (MSPs), such as their mass-radius ratio, equation of state and magnetic field topology, can be inferred from pr…
Synchro-curvature emitting regions in high-energy pulsar models
Daniel Íñiguez-Pascual, Daniele Viganò, Diego F. Torres
The detected high-energy pulsars' population is growing in number, and thus, having agile and physically relevant codes to analyze it consistently is important. Here, we update our…
Inferring pulsar periods from synchro-curvature spectra
Daniel Íñiguez-Pascual, Diego F. Torres, Daniele Viganò
The period and the period derivative of a pulsar are critical magnitudes for defining the properties of the magnetospheric size and plasma dynamics. The pulsar light cylinder, the…
Thermal luminosity degeneracy of magnetized neutron stars with and without hyperon cores
F. Anzuini, A. Melatos, C. Dehman +2
The dissipation of intense crustal electric currents produces high Joule heating rates in cooling neutron stars. Here it is shown that Joule heating can counterbalance fast cooling…
Fast cooling and internal heating in hyperon stars
F. Anzuini, A. Melatos, C. Dehman +2
Neutron star models with maximum mass close to reach high central densities, which may activate nucleonic and hyperon direct Urca neutrino emission. To alleviate th…
The X-ray evolution and geometry of the 2018 outburst of XTE J1810-197
A. Borghese, N. Rea, R. Turolla +17
After 15 years, in late 2018, the magnetar XTE J1810-197 underwent a second recorded X-ray outburst event and reactivated as a radio pulsar. We initiated an X-ray monitoring campai…
Magneto-thermal evolution of neutron stars with coupled Ohmic, Hall and ambipolar effects via accurate finite-volume simulations
Daniele Viganò, Alberto García-García, José A. Pons +2
Simulating the long-term evolution of temperature and magnetic fields in neutron stars is a major effort in astrophysics, having significant impact in several topics. A detailed ev…
The new magnetar SGR J1830-0645 in outburst
F. Coti Zelati, A. Borghese, G. L. Israel +13
The detection of a short hard X-ray burst and an associated bright soft X-ray source by the Swift satellite in 2020 October heralded a new magnetar in outburst, SGR J1830-0645. Pul…
On the rate of crustal failures in young magnetars
Clara Dehman, Daniele Viganò, Nanda Rea +3
The activity of magnetars is powered by their intense and dynamic magnetic fields and has been proposed as the trigger to extragalactic Fast Radio Bursts. Here we estimate the freq…
The long-term enhanced brightness of the magnetar 1E 1547.0-5408
Francesco Coti Zelati, Alice Borghese, Nanda Rea +6
We present the evolution of the X-ray emission properties of the magnetar 1E 1547.0-5408 since February 2004 over a time period covering three outbursts. We analyzed new and archiv…
Spectral characterization of the non-thermal X-ray emission of gamma-ray pulsars
Francesco Coti Zelati, Diego F. Torres, Jian Li +1
We report on a detailed spectral characterization of the non-thermal X-ray emission for a large sample of gamma-ray pulsars in the second Fermi-LAT catalogue. We outline the criter…
Magnetic, thermal and rotational evolution of isolated neutron stars
José A. Pons, Daniele Viganò
The strong magnetic field of neutron stars is intimately coupled to the observed temperature and spectral properties, as well as to the observed timing properties (distribution of…
A novel approach for the analysis of the geometry involved in determining light curves of pulsars
Daniele Viganò, Diego F. Torres
In this work, we introduce the use of the differential geometry Frenet-Serret equations to describe a magnetic line in a pulsar magnetosphere. These equations, which need to be sol…
Synchro-curvature modelling of the multi-frequency non-thermal emission of pulsars
Diego F. Torres, Daniele Vigano, Francesco Coti Zelati +1
We apply a synchro-curvature spectral emission model based on characterizing the dynamics of magnetospheric particles to fit the phase-average spectra of the most extended database…
Gradient sub-grid-scale model for relativistic MHD Large Eddy Simulations
Federico Carrasco, Daniele Viganò, Carlos Palenzuela
MHD turbulence is likely to play an important role in several astrophysical scenarios where the magnetic Reynolds is very large. Numerically, these cases can be studied efficiently…
Triggering magnetar outbursts in 3D force-free simulations
Federico Carrasco, Daniele Viganò, Carlos Palenzuela +1
In this letter, we present the first 3D force-free general relativity simulations of the magnetosphere dynamics related to the magnetar outburst/flare phenomenology. Starting from…
A systematic synchro-curvature modelling of pulsar -ray spectra unveils hidden trends
Daniele Viganò, Diego F. Torres, Jonatan Martín
-ray radiation from pulsars is usually thought to be mostly produced by the synchro-curvature losses of accelerated particles. Here we present a systematic study of all currentl…
Modelling of the Surface Emission of the Low-Magnetic Field Magnetar SGR 0418+5729
Sebastien Guillot, Rosalba Perna, Nanda Rea +2
We perform a detailed modelling of the post-outburst surface emission of the low magnetic field magnetar SGR 0418+5729. The dipolar magnetic field of this source, B=6x10^12 G estim…
Modeling of the gamma-ray pulsed spectra of Geminga, Crab, and Vela with synchro-curvature radiation
Daniele Viganò, Diego F. Torres
-ray spectra of pulsars have been mostly studied in a phenomenological way, by fitting them to a cut-off power-law function. Here, we analyze a model where pulsed emission comes…