Luminosity dependent accretion state change in GRO J1008–57

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Title: Luminosity dependent accretion state change in GRO J1008–57
Authors: Kühnel, Matthias | Müller, Sebastian | Kreykenbohm, Ingo | Fürst, Felix | Pottschmidt, Katja | Rothschild, Richard E. | Caballero, Isabel | Grinberg, Victoria | Schönherr, Gabriele | Shrader, Chris | Klochkov, Dmitry | Staubert, Rüdiger | Ferrigno, Carlo | Torrejon, Jose M. | Martínez Núñez, Silvia | Wilms, Jörn
Research Group/s: Astronomía y Astrofísica
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Keywords: X-rays: binaries | Pulsars: individual: GRO J1008-57 | Luminosity | Accretion state | Flux level
Knowledge Area: Astronomía y Astrofísica | Física Aplicada
Issue Date: 8-Jan-2014
Publisher: EDP Sciences
Citation: EPJ Web of Conferences. 2014, 64: 06003. doi:10.1051/epjconf/20136406003
Abstract: In a former publication, we have analyzed the transient neutron star X-ray binary GRO J1008–57 using all available RXTE-, Swift-, and Suzaku-data. As we have found, the source’s spectral components, i.e., a power-law with high exponential cutoff and a black-body, are strongly correlated with the hard X-ray flux (15–50 keV). We update the analytical description of these dependence, including a change in the photon index behaviour from a flat to a logarithmic function. The flux, where the change occurs, is consistent with the onset of the black-body emission. Thus, a change of the accretion state always occurs in GRO J1008–57 at a particular flux level.
Sponsor: We thank the Bundesministerium für Wirtschaft und Technologie for support via Deutsches Zentrum für Luft- und Raumfahrt grant 50OR1113 and the Deutscher Akademischer Austauschdienst.
URI: http://hdl.handle.net/10045/34951
ISSN: 2100-014X
DOI: 10.1051/epjconf/20136406003
Language: eng
Type: info:eu-repo/semantics/article
Rights: This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Peer Review: si
Publisher version: http://dx.doi.org/10.1051/epjconf/20136406003
Appears in Collections:INV - Astronomía y Astrofísica - Artículos de Revistas

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