Inversion of the decay of the cyclotron line energy in Hercules X-1

Staubert R, Klochkov D, Fuerst F, Wilms J, Rothschild RE, Harrison F (2017)


Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Publisher: EDP SCIENCES S A

Book Volume: 606

Article Number: ARTN L13

DOI: 10.1051/0004-6361/201731927

Abstract

Recent observations of Her X-1 with NuSTAR and INTEGRAL in 2016 have provided evidence that the 20-year decay of the cyclotron line energy found between 1996 and 2015 has ended and that an inversion with a new increase, possibly similar to the one observed around 1990-1993, has started. We consider this a strong motivation for further observations and for enhanced efforts to significantly improve our theoretical understanding of the accretion process in binary X-ray pulsars. We speculate about the physics behind the long-term decay and its inversion, a possible cyclic behavior, and correlations with other variable observables.

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APA:

Staubert, R., Klochkov, D., Fuerst, F., Wilms, J., Rothschild, R.E., & Harrison, F. (2017). Inversion of the decay of the cyclotron line energy in Hercules X-1. Astronomy & Astrophysics, 606. https://dx.doi.org/10.1051/0004-6361/201731927

MLA:

Staubert, R., et al. "Inversion of the decay of the cyclotron line energy in Hercules X-1." Astronomy & Astrophysics 606 (2017).

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