Welcome to my WebPage.


I am an astronomer working at the Osservatorio Astrofisico di Arcetri, in Italy. I study relativistic magneto-hydrodynamics, relativistic winds, compact objects like Pulsars, and Neutron Stars, and X-rays. I am involved in the development of numerical algorithms for the study of fluids in Special and General Relativity, and for the modelling of magnetized Neutron Stars.
I also teach the High Energy Astrophysics class at the University of Firenze. Finally, I am in charge of the Outreach program of my Institute.

My Asteroid


The Asteroid 235999 has been named "Bucciantini" after me. My thanks to the "Gruppo Astrofili Montagna Pistoiese" for this great gift. It sits somewhere between Mars and Jupiter (search for 235999).

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A PostDoc Abroad


In recent years, a small but steadily increasing number of funding programs have been put in place to help postdocs pursue their own research projects while remaining in someone else's lab. One such program--the Hubble Fellowships offered by NASA--has given Italian astronomer Niccolò Bucciantini unprecedented independence......

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«NON MI SONO mai sentito un cervello in fuga». Parola di Niccolò Bucciantini, astrofisico, 38 anni, aglianese trasferito a San Casciano Val di Pesa, ricercatore permanente all’osservatorio fiorentino di Arcetri dopo avere svolto progetti di ricerca negli Usa e in Svezia e tenuto conferenze in tutto il mondo. A 23 anni laurea in fisica ....

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PSR J1709-4429's Proper Motion and its Relationship to SNR G343.1-2.3

We have obtained a deep 670 ks CXO ACIS image of the remarkable pulsar wind nebula (PWN) of PSR J1709-4429, in 4 epochs during 2018-2019. Comparison with an archival 2004 data set provides a pulsar proper motion mu = 13 \pm 3 mas/yr at a PA of 86 \pm 9 degree (1 sigma combined statistical and systematic uncertainties), precluding birth near the center of SNR G343.1-2.3. At the pulsar's characteristic age of 17 kyr, the association can be preserved through a combination of progenitor wind, birth kick and PWN outflow. Associated TeV emission may, .... [...]

M. de Vries et al., 2021, ApJ, in press

Magnetic deformation of neutron stars in scalar-tensor theories

Scalar-tensor theories are among the most promising alternatives to general relativity that have been developed to account for some long standing issues in our understanding of gravity. Some of these theories predict the existence of a non-linear phenomenon, spontaneous scalarisation, which can lead to the appearance of sizeable modifications to general relativity in the presence of compact matter distributions, namely neutron stars. We investigate here how the presence of spontaneous scalarisation can affect the magnetic deformation of neutron stars ..... [...]

J. Soldateschi et al., 2021, A&A, 645, A39

Reverberation of pulsar wind nebulae (I): impact of the medium properties and other parameters upon the extent of the compression

The standard approach to the long-term evolution of pulsar wind nebulae (PWNe) is based on one-zone models treating the nebula as a uniform system. In particular for the late phase of evolved systems, many of the generally used prescriptions are based on educated guesses for which a proper assessment lacks. Using an advanced radiative code, we evaluate the systematic impact of various parameters, like the properties of the supernova ejecta, of the inner pulsar, as well of the ambient medium, upon the extent of the reverberation phase of PWNe. We investigate how different prescriptions ...... [...]

R. Bandiera et al., 2020, MNRAS, 499, 2051