Luminosity dependent accretion state change in GRO J1008-57

Kühnel M, Müller S, Kreykenbohm I, Fuerst F, Pottschmidt K, Rothschild RE, Caballero I, Grinberg V, Schoenherr G, Shrader C, Klochkov D, Staubert R, Ferrigno C, Torrejon JM, Martinez-Nunez S, Wilms J (2014)

Publication Status: Published

Publication Type: Conference contribution

Publication year: 2014

Journal

EPJ Web of Conferences EDP Sciences: EPJ Open Access / EDP Sciences

Book Volume: 64

Article Number: UNSP 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.

Authors with CRIS profile

Matthias Bissinger Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Sebastian Müller Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Ingo Kreykenbohm Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Victoria Grinberg Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Jörn Wilms Professur für Astronomie und Astrophysik

Involved external institutions

Eberhard Karls Universität Tübingen DE Germany (DE) National Aeronautics and Space Administration (NASA) US United States (USA) (US) Leibniz Institute for Astrophysics Potsdam / Leibniz-Institut für Astrophysik Potsdam DE Germany (DE) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot FR France (FR) University of California, San Diego US United States (USA) (US) University of Maryland, Baltimore County (UMBC) US United States (USA) (US) California Institute of Technology (Caltech) US United States (USA) (US) University of Alicante / Universidad de Alicante / Universitat d'Alacant ES Spain (ES) University of Geneva / Université de Genève (UNIGE) CH Switzerland (CH)

How to cite

APA:

Kühnel, M., Müller, S., Kreykenbohm, I., Fuerst, F., Pottschmidt, K., Rothschild, R.E.,... Wilms, J. (2014). Luminosity dependent accretion state change in GRO J1008-57.

MLA:

Kühnel, Matthias, et al. "Luminosity dependent accretion state change in GRO J1008-57." 2014.

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