Potential origin of the state-dependent high-energy tail in the black hole microquasar Cygnus X-1 as seen with INTEGRAL

no code implementations • 9 Feb 2021 • F. Cangemi, T. Beuchert, T. Siegert, J. Rodriguez, V. Grinberg, R. Belmont, C. Gouiffès, I. Kreykenbohm, P. Laurent, K. Pottschmidt, J. Wilms

We discuss the potential origins of the high-energy components in both states, and favor an interpretation where the part of the high-energy component is due to a compact jet in the hard state and hybrid Comptonization in either a magnetised or non-magnetised corona in the soft state.

High Energy Astrophysical Phenomena

The X-ray pulsar XTE J1858+034 observed with NuSTAR and Fermi/GBM: spectral and timing characterization plus a cyclotron line

no code implementations • 18 Jan 2021 • C. Malacaria, P. Kretschmar, K. K. Madsen, C. A. Wilson-Hodge, Joel B. Coley, P. Jenke, A. A. Lutovinov, K. Pottschmidt, S. S. Tsygankov, J. Wilms

Accreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the spectral and timing behavior of the neutron star can be studied in detail.

High Energy Astrophysical Phenomena Solar and Stellar Astrophysics