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The evolution of the corona in MAXI J1535-571 through type-C quasi-periodic oscillations with Insight-HXMT

The evolution of the corona in MAXI J1535-571 through type-C quasi-periodic oscillations with Insight-HXMT
The evolution of the corona in MAXI J1535-571 through type-C quasi-periodic oscillations with Insight-HXMT
Type-C quasi-periodic oscillations (QPOs) in black hole X-ray transients can appear when the source is in the low-hard and hard-intermediate states. The spectral-timing evolution of the type-C QPO in MAXI J1535−571 has been recently studied with Insight-HXMT. Here, we fit simultaneously the time-averaged energy spectrum, using a relativistic reflection model, and the fractional rms and phase-lag spectra of the type-C QPOs, using a recently developed time-dependent Comptonization model when the source was in the intermediate state. For the first time, we show that the time-dependent Comptonization model can successfully explain the X-ray data up to 100 keV. We find that in the hard-intermediate state the frequency of the type-C QPO decreases from 2.6 to 2.1 Hz, then increases to 3.3 Hz, and finally increases to ∼9 Hz. Simultaneously with this, the evolution of corona size and the feedback fraction (the fraction of photons up-scattered in the corona that return to the disc) indicates the change of the morphology of the corona. Compared with contemporaneous radio observations, this evolution suggests a possible connection between the corona and the jet when the system is in the hard-intermediate state and about to transit into the soft-intermediate state.
0035-8711
2686–2696
Zhang, Liang
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Zhang, Yuexin
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Méndez, Mariano
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García, Federico
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Karpouzas, Konstantinos
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Altamirano, Diego
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Zhang, Shuang-Nan
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Belloni, Tomaso M.
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Qu, Jinlu
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Zhang, Shu
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Tao, Lian
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Huang, Yue
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Kong, Lingda
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Ma, Ruican
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Yu, Wei
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Rawat, Divya
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Bellavita, Candela
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Zhang, Liang
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Zhang, Yuexin
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Méndez, Mariano
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García, Federico
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Karpouzas, Konstantinos
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Altamirano, Diego
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Zhang, Shuang-Nan
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Belloni, Tomaso M.
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Qu, Jinlu
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Zhang, Shu
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Tao, Lian
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Huang, Yue
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Kong, Lingda
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Ma, Ruican
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Yu, Wei
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Rawat, Divya
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Bellavita, Candela
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Zhang, Liang, Zhang, Yuexin, Méndez, Mariano, García, Federico, Karpouzas, Konstantinos, Altamirano, Diego, Zhang, Shuang-Nan, Belloni, Tomaso M., Qu, Jinlu, Zhang, Shu, Tao, Lian, Huang, Yue, Kong, Lingda, Ma, Ruican, Yu, Wei, Rawat, Divya and Bellavita, Candela (2022) The evolution of the corona in MAXI J1535-571 through type-C quasi-periodic oscillations with Insight-HXMT. Monthly Notices of the Royal Astronomical Society, 512 (2), 2686–2696. (doi:10.1093/mnras/stac690).

Record type: Article

Abstract

Type-C quasi-periodic oscillations (QPOs) in black hole X-ray transients can appear when the source is in the low-hard and hard-intermediate states. The spectral-timing evolution of the type-C QPO in MAXI J1535−571 has been recently studied with Insight-HXMT. Here, we fit simultaneously the time-averaged energy spectrum, using a relativistic reflection model, and the fractional rms and phase-lag spectra of the type-C QPOs, using a recently developed time-dependent Comptonization model when the source was in the intermediate state. For the first time, we show that the time-dependent Comptonization model can successfully explain the X-ray data up to 100 keV. We find that in the hard-intermediate state the frequency of the type-C QPO decreases from 2.6 to 2.1 Hz, then increases to 3.3 Hz, and finally increases to ∼9 Hz. Simultaneously with this, the evolution of corona size and the feedback fraction (the fraction of photons up-scattered in the corona that return to the disc) indicates the change of the morphology of the corona. Compared with contemporaneous radio observations, this evolution suggests a possible connection between the corona and the jet when the system is in the hard-intermediate state and about to transit into the soft-intermediate state.

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2203.05308 - Accepted Manuscript
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Accepted/In Press date: 10 March 2022
Published date: 12 March 2022

Identifiers

Local EPrints ID: 457404
URI: http://eprints.soton.ac.uk/id/eprint/457404
ISSN: 0035-8711
PURE UUID: 4ff12056-7f26-40a0-ab08-13f405d701fb
ORCID for Diego Altamirano: ORCID iD orcid.org/0000-0002-3422-0074

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Date deposited: 07 Jun 2022 16:36
Last modified: 08 Jun 2022 01:44

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Contributors

Author: Liang Zhang
Author: Yuexin Zhang
Author: Mariano Méndez
Author: Federico García
Author: Shuang-Nan Zhang
Author: Tomaso M. Belloni
Author: Jinlu Qu
Author: Shu Zhang
Author: Lian Tao
Author: Yue Huang
Author: Lingda Kong
Author: Ruican Ma
Author: Wei Yu
Author: Divya Rawat
Author: Candela Bellavita

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