High mass X-ray binaries are among the brightest X-ray sources in the Milky Way, as well as
in nearby Galaxies. Thanks to their highly variable emissions and complex phenomenology …

High-mass X-ray binaries are fundamental in the study of stellar evolution, nucleosynthesis,
structure and evolution of galaxies and accretion processes. Hard X-rays observations by …

Cyclotron lines, also called cyclotron resonant scattering features are spectral features,
generally appearing in absorption, in the X-ray spectra of objects containing highly …

The accretion flow around X-ray pulsars with a strong magnetic field is funnelled by the field
to relatively small regions close to the magnetic poles of the neutron star (NS), the hotspots …

Cyclotron resonance scattering features observed in the spectra of some X-ray pulsars show
significant changes of the line energy with the pulsar luminosity. At high luminosities, these …

We present NuSTAR observations of Vela X-1, a persistent, yet highly variable, neutron star
high-mass X-ray binary (HMXB). Two observations were taken at similar orbital phases but …

We investigate the aperiodic variability for a relatively large sample of accreting neutron
stars and intermediate polars, focusing on the properties of the characteristic break …

We report on the analysis of NuSTAR observations of the Be-transient X-ray pulsar V 0332+
53 during the giant outburst in 2015 and another minor outburst in 2016. We confirm the …

Some of the accreting X-ray pulsars are reported to exhibit a peculiar spectral feature at∼
10 keV, known as the '10 keV feature'. The feature has been characterized as either an …

Recent observations of X-ray pulsars at low luminosities allow, for the first time, the
comparison of theoretical models of the emission from highly magnetized neutron star …