Massive stars, at least∼ 10 \sim10 times more massive than the Sun, have two key
properties that make them the main drivers of evolution of star clusters, galaxies, and the …

The early 21st century is witnessing a breakthrough in the study of the thermal radiation of
neutron stars. Observations with modern space telescopes have provided a wealth of …

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 detection of cyclotron resonance scattering features (CRSFs) is the only way to directly
and reliably measure the magnetic field near the surface of a neutron star (NS). The broad …

The first X-ray pulsar, Cen X-3, was discovered 50 yr ago. Radiation from such objects is
expected to be highly polarized due to birefringence of plasma and vacuum associated with …

Abstract Swift J0243. 6+ 6124 is a newly discovered Galactic Be/X-ray binary, revealed in
late 2017 September in a giant outburst with a peak luminosity of 2× 10 39 (d/7 kpc) 2 erg s …

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 …

The phase-and energy-resolved polarization measurements of accreting X-ray pulsars
(XRPs) allow us to test different theoretical models of their emission, and they also provide …

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 …

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 …