INTEGRAL study of MAXI J1535-571, MAXI J1820+070, and MAXI J1348-630 outbursts
Cangemi F, Rodriguez J, Belloni T, Gouiffès C, Grinberg V, Laurent P, Petrucci PO, Wilms J (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 669
Article Number: A65
DOI: 10.1051/0004-6361/202243564
Abstract
In black hole X-ray binaries, a nonthermal high-energy component is sometimes detected at energies above 200 keV. The origin of this high-energy component is debated and distinct spectral modelizations can lead to di_erent interpretations. High-energy polarimetry measurements with the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) enable new diagnostics on the physics responsible for the MeV spectral component in black hole X-ray binaries. In this work, we aim to investigate the high-energy behavior of three bright sources discovered by the Monitor of All-sky X-ray Image: MAXI J1535-571, MAXI J1820+070, and MAXI J1348-630. We took advantage of their brightness to investigate their soft -ray (0.1-2 MeV) properties with INTEGRAL. We used both spectral and polarimetric approaches to probe their high-energy emission with the aim of bringing new constraints on the MeV emission in black hole X-ray binaries. We first studied the spectral characteristics of the sources in the 3-2000 keV range using JEM-X, IBIS, and SPI, with a semi-phenomenological description of the data. We then used IBIS as a Compton telescope in order to evaluate the polarization properties of the sources above 300 keV. A high-energy component was detected during the hardintermediate state and soft-intermediate state of MAXI J1535-571, the low-hard state of MAXI J1820+070, and the low-hard state of MAXI J1348-630. The components detected in MAXI J1820+070 and MAXI J1348-630 were polarized with a polarization fraction of 26±9° and >56% in the 300-1000 keV range, respectively.With no polarization information for MAXI J1535-571, the component detected could either come from the jets or the corona. In the case of MAXI J1820+070, the extrapolation of the synchrotron spectrum measured in the infrared indicates that the component is likely due to a nonthermal distribution of electrons from a hybrid corona. For MAXI J1348-630, the high fraction of polarization points toward a jets origin; however, we cannot formally conclude this without any infrared data giving information on the optically thin part of the synchrotron spectrum.
Authors with CRIS profile
Involved external institutions
Sorbonne Université
France (FR)
Université Paris-Saclay
France (FR)
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
European Space Research and Technology Centre (ESTEC, ESA)
Netherlands (NL)
Institut de Planétologie et d'Astrophysique de Grenoble (IPAG)
France (FR)
France (FR)
Université Paris-Saclay
France (FR)
National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF)
Italy (IT)
European Space Research and Technology Centre (ESTEC, ESA)
Netherlands (NL)
Institut de Planétologie et d'Astrophysique de Grenoble (IPAG)
France (FR)
How to cite
APA:
Cangemi, F., Rodriguez, J., Belloni, T., Gouiffès, C., Grinberg, V., Laurent, P.,... Wilms, J. (2023). INTEGRAL study of MAXI J1535-571, MAXI J1820+070, and MAXI J1348-630 outbursts. Astronomy & Astrophysics, 669. https://dx.doi.org/10.1051/0004-6361/202243564
MLA:
Cangemi, F., et al. "INTEGRAL study of MAXI J1535-571, MAXI J1820+070, and MAXI J1348-630 outbursts." Astronomy & Astrophysics 669 (2023).
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