Nicolas Zalot

Pulse profiles of accreting neutron stars - A review of analysis methods, observations, and theoretical models

Katja Pottschmidt, Peter Kretschmar, E. Sokolova-Lapa, Elena Ambrosi et autres

X-ray pulsars are highly magnetized ($B\sim 10^{12}$ G) neutron stars accreting from a donor star. Their characteristic X-ray emission arises from accreted material decelerated from relativistic velocities near the magnetic poles of the neutron star. As our line of sight onto the …

A simple relation: Neutron star magnetic field strength and spectral shape at low mass accretion rates

Nicolas Zalot, E. Sokolova-Lapa, A. Zainab, P. Thalhammer et autres

Context. The X-ray spectra of neutron stars with moderate magnetic fields (B ∼ 1012 G) in high-mass X-ray binaries (HMXBs) at low X-ray luminosities (LX ≲ 1035 erg s−1) are characterized by a double humped shape. This shape has been explained either …

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A simple relation: Neutron star magnetic field strength and spectral shape at low mass accretion rates

Nicolas Zalot, E. Sokolova-Lapa, A. Zainab, P. Thalhammer et autres

Context. The X-ray spectra of neutron stars with moderate magnetic fields ( B ∼ 10 12 G) in high-mass X-ray binaries (HMXBs) at low X-ray luminosities ( L X ≲ 10 35 erg s −1 ) are characterized by a double humped …

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A simple relation: Neutron star magnetic field strength and spectral shape at low mass accretion rates

Nicolas Zalot, E. Sokolova-Lapa, A. Zainab, P. Thalhammer et autres

The X-ray spectra of neutron stars with moderate magnetic fields ($B\sim 10^{12}$ G) in high-mass X-ray binaries (HMXBs) at low X-ray luminosities ($L_\mathrm{X}\lesssim 10^{35}$ erg/s) are characterized by a double humped shape. This shape has been explained either as the radiation from …

A simple relation: Neutron star magnetic field strength and spectral shape at low mass accretion rates

Nicolas Zalot, E. Sokolova-Lapa, A. Zainab, P. Thalhammer et autres

The X-ray spectra of neutron stars with moderate magnetic fields ($B\sim 10^{12}$ G) in high-mass X-ray binaries (HMXBs) at low X-ray luminosities ($L_\mathrm{X}\lesssim 10^{35}$ erg/s) are characterized by a double humped shape. This shape has been explained either as the radiation from …

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A simple relation: Neutron star magnetic field strength and spectral shape at low mass accretion rates

Nicolas Zalot, E. Sokolova-Lapa, A. Zainab, P. Thalhammer et autres

The X-ray spectra of neutron stars with moderate magnetic fields ($B\sim 10^{12}$ G) in high-mass X-ray binaries (HMXBs) at low X-ray luminosities ($L_\mathrm{X}\lesssim 10^{35}$ erg/s) are characterized by a double humped shape. This shape has been explained either as the radiation from …

Flux variability of the "10 keV feature" of 4U 0115+63

Katrin Berger, E. Sokolova-Lapa, Ralf Ballhausen, A. Zainab et autres

X-ray spectra of accretion-powered X-ray pulsars can often be described using a power-law continuum with a high-energy cutoff, which might be further modified by additional spectral components. The Be X-ray binary system 4U 0115+63 is well known for having one of the …

Flux variability of the “10 keV feature” of 4U 0115+63

Katrin Berger, E. Sokolova-Lapa, Ralf Ballhausen, A. Zainab et autres

Context. X-ray spectra of accretion-powered X-ray pulsars can often be described using a power-law continuum with a high-energy cutoff, which might be further modified by additional spectral components. The Be X-ray binary system 4U 0115+63 is well known for having one of …

Flux variability of the “10 keV feature” of 4U 0115+63

Katrin Berger, E. Sokolova-Lapa, Ralf Ballhausen, A. Zainab et autres

Context. X-ray spectra of accretion-powered X-ray pulsars can often be described using a power-law continuum with a high-energy cutoff, which might be further modified by additional spectral components. The Be X-ray binary system 4U 0115+63 is well known for having one of …

Flux variability of the “10 keV feature” of 4U 0115+63

Katrin Berger, E. Sokolova-Lapa, Ralf Ballhausen, A. Zainab et autres

Context. X-ray spectra of accretion-powered X-ray pulsars can often be described using a power-law continuum with a high-energy cutoff, which might be further modified by additional spectral components. The Be X-ray binary system 4U 0115+63 is well known for having one of …

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Don’t torque like that

Jakob Stierhof, E. Sokolova-Lapa, G. Vasilopoulos, P. Thalhammer et autres

Context. Changes in the rotational period observed in various magnetized accreting sources are generally attributed to the interaction between the infalling plasma and the large-scale magnetic field of the accretor. A number of models have been proposed to link these changes to …

Multi-wavelength study of 1eRASS J085039.9−421151 with eROSITA, NuSTAR, and X-shooter

A. Zainab, A. Avakyan, Victor Doroshenko, P. Thalhammer et autres

The eROSITA instrument on board Spectrum-Roentgen-Gamma (SRG) has completed four scans of the X-ray sky, leading to the detection of almost one million X-ray sources in eRASS1 alone, including multiple new X-ray binary candidates. We report on analysis of the X-ray binary …

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