Accreting on the Edge: A Luminosity-dependent Cyclotron Line in the Be/X-Ray Binary 2S 1553-542 Accompanied by Accretion Regimes Transition
Malacaria C, Bhargava Y, Coley JB, Ducci L, Pradhan P, Ballhausen R, Fuerst F, Islam N, Jaisawal GK, Jenke P, Kretschmar P, Kreykenbohm I, Pottschmidt K, Sokolova-Lapa E, Staubert R, Wilms J, Wilson-Hodge CA, Wolff MT (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 927
Journal Issue: 2
Abstract
Accreting X-ray pulsars undergo luminous X-ray outbursts during which the luminosity-dependent spectral and timing features of the neutron star's emission can be analyzed in detail, thus shedding light on the accretion regime at work. We took advantage of a monitoring campaign that was performed with NuSTAR, Swift/XRT, AstroSat and NICER to follow the Be/X-ray Binary 2S 1553-542 along one of its rare outbursts, and thus trace its spectral and timing evolution. We report the discovery of a luminosity-dependent cyclotron line energy for the first time in this source. The pulse profiles and pulsed fraction also show variability along the outburst, which is consistent with the interpretation that the source transitions from the subcritical to the supercritical accretion regime, separated by a critical luminosity of L (crit) approximate to 4 x 10(37) erg s(-1).
Authors with CRIS profile
Ingo Kreykenbohm
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Ekaterina Sokolova-Lapa
Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut
Jörn Wilms
Lehrstuhl für Astronomie und Astrophysik
Involved external institutions
University of Maryland
United States (USA) (US)
Eberhard Karls Universität Tübingen
Germany (DE)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
Inter-University Centre for Astronomy and Astrophysics (IUCAA)
India (IN)
Universities Space Research Association (USRA)
United States (USA) (US)
University of Alabama in Huntsville (UAH)
United States (USA) (US)
Howard University
United States (USA) (US)
Technical University of Denmark / Danmarks Tekniske Universitet (DTU)
Denmark (DK)
European Space Astronomy Centre (ESAC)
Spain (ES)
University of Maryland, Baltimore County (UMBC)
United States (USA) (US)
U.S. Naval Research Laboratory
United States (USA) (US)
United States (USA) (US)
Eberhard Karls Universität Tübingen
Germany (DE)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
National Aeronautics and Space Administration (NASA)
United States (USA) (US)
Inter-University Centre for Astronomy and Astrophysics (IUCAA)
India (IN)
Universities Space Research Association (USRA)
United States (USA) (US)
University of Alabama in Huntsville (UAH)
United States (USA) (US)
Howard University
United States (USA) (US)
Technical University of Denmark / Danmarks Tekniske Universitet (DTU)
Denmark (DK)
European Space Astronomy Centre (ESAC)
Spain (ES)
University of Maryland, Baltimore County (UMBC)
United States (USA) (US)
U.S. Naval Research Laboratory
United States (USA) (US)
How to cite
APA:
Malacaria, C., Bhargava, Y., Coley, J.B., Ducci, L., Pradhan, P., Ballhausen, R.,... Wolff, M.T. (2022). Accreting on the Edge: A Luminosity-dependent Cyclotron Line in the Be/X-Ray Binary 2S 1553-542 Accompanied by Accretion Regimes Transition. Astrophysical Journal, 927(2). https://doi.org/10.3847/1538-4357/ac524f
MLA:
Malacaria, C., et al. "Accreting on the Edge: A Luminosity-dependent Cyclotron Line in the Be/X-Ray Binary 2S 1553-542 Accompanied by Accretion Regimes Transition." Astrophysical Journal 927.2 (2022).
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