Accreting on the edge: a luminosity-dependent cyclotron line in the Be/X-ray Binary 2S 1553-542 accompanied by accretion regimes transition
| dc.contributor.author | Malacaria, C. | |
| dc.contributor.author | Bhargava, Y. | |
| dc.contributor.author | Coley, Joel B. | |
| dc.contributor.author | Ducci, L. | |
| dc.contributor.author | Pradhan, P. | |
| dc.contributor.author | Ballhausen, R. | |
| dc.contributor.author | Fuerst, F. | |
| dc.contributor.author | Islam, N. | |
| dc.contributor.author | Jaisawal, G. K. | |
| dc.contributor.author | Jenke, P. | |
| dc.contributor.author | Kretschmar, P. | |
| dc.contributor.author | Kreykenbohm, I. | |
| dc.contributor.author | Pottschmidt, Katja | |
| dc.contributor.author | Sokolova-Lapa, E. | |
| dc.contributor.author | Staubert, R. | |
| dc.contributor.author | Wilms, J. | |
| dc.contributor.author | Wilson-Hodge, C.A. | |
| dc.contributor.author | Wolff, Michael T. | |
| dc.date.accessioned | 2022-03-04T19:32:35Z | |
| dc.date.available | 2022-03-04T19:32:35Z | |
| dc.date.issued | 2022-03-15 | |
| dc.description.abstract | Accreting X-ray pulsars (XRPs) 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 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 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, consistently with the interpretation that the source transitions from the sub-critical to the super-critical accretion regime, separated by a critical luminosity of Lᴄᵣᵢₜ≈ 4×10³⁷ erg/s. | en_US |
| dc.description.sponsorship | This research has made use of data and software provided by the High Energy Astrophysics Science Archive Research Center (HEASARC), which is a service of the Astrophysics Science Division at NASA/GSFC and the High Energy Astrophysics Division of the Smithsonian Astrophysical Observatory. We acknowledge extensive use of the NASA Abstract Database Service (ADS). The material is based upon work supported by NASA under award number 80GSFC21M0002 (CRESST II). This work used data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by NASA, and has utilized the NUSTARDAS software package, jointly developed by the ASI Science Data Cen ter, Italy, and the California Institute of Technology, USA. This work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester and has also made use of the XRT Data Analysis Software (XRTDAS) developed under the responsibility of the ASI Science Data Center, Italy. This work was supported by NASA through the NICER mission and the Astrophysics Explorers Program. This work has been performed utilizing the calibration data-bases and auxiliary analysis tools developed, maintained and distributed by AstroSat-SXT and LAXPC teams with members from various institutions in India and abroad. C.M. is supported by an appointment with the Universities Space Research Association. ESL acknowledges the support by DFG grant 1830Wi1860/11-1. MTW is supported at NRL by NASA under Interagency Agreement NNG200808A. RB acknowledges support by NASA under award number 80GSFC21M0002. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.3847/1538-4357/ac524f | en_US |
| dc.format.extent | 8 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m25wxr-2lma | |
| dc.identifier.citation | 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." The Astrophysical Journal, 927, no. 2 (15 March 2022). https://doi.org/10.3847/1538-4357/ac524f | |
| dc.identifier.uri | http://hdl.handle.net/11603/24346 | |
| dc.identifier.uri | https://doi.org/10.3847/1538-4357/ac524f | |
| dc.language.iso | en_US | en_US |
| dc.publisher | AAS | |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | en_US |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | Accreting on the edge: a luminosity-dependent cyclotron line in the Be/X-ray Binary 2S 1553-542 accompanied by accretion regimes transition | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-2413-9301 | en_US |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 |