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Physics and astrophysics of strong magnetic field systems with eXTP
Andrea Santangelo, Silvia Zane, Hua Feng +38
In this paper we present the science potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies of strongly magnetized objects. We will focus on the physics…
Cyclotron lines in highly magnetized neutron stars
R. Staubert, J. Trümper, E. Kendziorra +10
Cyclotron lines, also called cyclotron resonant scattering features (CRSF) are spectral features, generally appearing in absorption, in the X-ray spectra of objects containing high…
Explaining the asymmetric line profile in Cepheus X-4 with spectral variation across pulse phase
Yash Bhargava, Varun Bhalerao, Ralf Ballhausen +4
The high mass X-ray binary Cep X-4, during its 2014 outburst, showed evidence for an asymmetric cyclotron line in its hard X-ray spectrum. The 2014 spectrum provides one of the cle…
Discovery of pulsation dropout and turn-on during the high state of the accreting X-ray pulsar LMC X-4
McKinley C. Brumback, Ryan C. Hickox, Matteo Bachetti +6
Two \textit{NuSTAR} observations of the luminous X-ray pulsar LMC X-4 in October and November 2015 captured several bright accretion flares from this source, which has a long histo…
NuSTAR rules out a cyclotron line in the accreting magnetar candidate 4U2206+54
J. M. Torrejón, P. Reig, F. Fürst +3
Based on our new NuSTAR X-ray telescope data, we rule out any cyclotron line up to 60 keV in the spectra of the high mass X-ray binary 4U2206+54. In particular, we do not find any…
A Potential Cyclotron Resonant Scattering Feature in the ULX Pulsar NGC 300 ULX1 seen by NuSTAR and XMM-Newton
D. J. Walton, M. Bachetti, F. Fuerst +14
Based on phase-resolved broadband spectroscopy using - and , we report on a potential cyclotron resonant scattering feature at keV in the pulsed sp…
Evidence for a Variable Ultrafast Outflow in the Newly Discovered Ultraluminous Pulsar NGC 300 ULX-1
P. Kosec, C. Pinto, D. J. Walton +5
Ultraluminous pulsars are a definite proof that persistent super-Eddington accretion occurs in nature. They support the scenario according to which most Ultraluminous X-ray Sources…
Alternative explanations for extreme supersolar iron abundances inferred from the energy spectrum of Cygnus X-1
John A. Tomsick, Michael L. Parker, Javier A. Garcia +11
Here we study a 1-200 keV energy spectrum of the black hole binary Cygnus X-1 taken with NuSTAR and Suzaku. This is the first report of a NuSTAR observation of Cyg X-1 in the inter…