Phase-resolved high-resolution spectroscopy of M82 X-2 with XRISM Resolve finds broader Fe Kα line during pulse peak, indicating origin in the accretion flow with velocity dispersion of about 1700 km/s.
The limiting luminosity of accreting neutron stars with magnetic fields.Mon
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First detection of mHz QPOs in 1A 0535+262 below 27 keV with frequencies evolving from 41 to 93 mHz, mostly hard lags, and double-peaked high-energy structure near outburst peak, interpreted as linked to soft-photon source and Comptonizing outflow evolution.
Numerical solutions of hydrodynamics and polarized radiative transfer show that resonant Compton scattering near the cyclotron resonance redistributes radiation and reduces light-curve modulation amplitude in subcritical X-ray pulsars.
Simulations of subcritical X-ray pulsar accretion channels show vacuum polarization dominating plasma birefringence, enhancing cyclotron features and radiative deceleration, producing a polarization sign change above resonance, and a positive correlation between cyclotron centroid energy and accret
New XRISM observations confirm a highly broadened, pulsating Fe K line from the accretion column of Hercules X-1 that varies with pulse phase and evolves with the 35-day precession cycle.
The 2026 outburst of 1A 1118-61 is brighter and spectrally harder than in 2009, with constant cyclotron line energy across large luminosity changes and QPO frequency suggesting magnetospheric instabilities.
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Beaming of polarized radiation in subcritical X-ray pulsars
Numerical solutions of hydrodynamics and polarized radiative transfer show that resonant Compton scattering near the cyclotron resonance redistributes radiation and reduces light-curve modulation amplitude in subcritical X-ray pulsars.