Discovery of a flux-related change of the cyclotron line energy in Hercules X-1

2007/02/19 by R. Staubert, N. I. Shakura, К. А. Постнов +7 · 11 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #Pulsars and Gravitational Waves Research #astro-ph

paper · pdf · doi:10.1051/0004-6361:20077098

4 pages, 2 figures, accepted by A&A Letters

arxiv created 2007/02/19 · openalex publication_date 2007/02/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31

Abstract

Aims. We present the results of ten years of repeated measurements of the Cyclotron Resonance Scattering Feature (CRSF) in the spectrum of the binary X-ray pulsar Her X-1 and report the discovery of a positive correlation of the centroid energy of this absorption feature in pulse phase averaged spectra with source luminosity.

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