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Variability and phase lags of the type-C quasi-periodic oscillation of MAXI J1348-630 with NICER

Variability and phase lags of the type-C quasi-periodic oscillation of MAXI J1348-630 with NICER
Variability and phase lags of the type-C quasi-periodic oscillation of MAXI J1348-630 with NICER
We study the properties of the type-C quasi-periodic oscillation (type-C QPO) of MAXI J1348–630 during its 2019 outburst and reflare with NICER. This is the first time that the evolution of the properties of type-C QPOs is studied during an outburst reflare. We found that the properties of the type-C QPO during the reflare are similar to those of type-C QPOs observed in other black hole systems during outburst. This suggests that the physical processes responsible for type-C QPOs are the same in a reflare and in an outburst. We also found that the full width at half-maximum of a high-frequency broad-band component observed during the reflare changes significantly with energy. We studied the energy-dependent fractional rms amplitude and phase lags of the type-C QPO from 0.5 to 12 keV. We found that the fractional rms amplitude increases up to 2–3 keV and then remains approximately constant above this energy, and the lag spectra of the type-C QPO are hard. We discuss the dependence of the fractional rms amplitude and phase lags with energy in the context of Comptonization as the radiative mechanism driving the QPO rms and lag spectra.
Accretion, Accretion discs, Black hole physics, X-rays: binaries, X-rays: individual: MAXI J1348-630
0035-8711
2839 -2854
Alabarta, Kevin
8c164ccd-de85-4b2b-870b-7471ff95423b
Méndez, Mariano
5cc6f759-dae2-488a-9cc2-cff89f4eca72
García, Federico
7c0fed66-dda4-4333-b38c-175f570820ce
Peirano, Valentina
4981c64a-f74c-4993-abab-245ee9803523
Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Zhang, Liang
77199a72-9bb0-4336-bbff-15c8e1b790cb
Karpouzas, Konstantinos
d796fbbc-2dbb-4244-8c06-ad6466a9abc0
Alabarta, Kevin
8c164ccd-de85-4b2b-870b-7471ff95423b
Méndez, Mariano
5cc6f759-dae2-488a-9cc2-cff89f4eca72
García, Federico
7c0fed66-dda4-4333-b38c-175f570820ce
Peirano, Valentina
4981c64a-f74c-4993-abab-245ee9803523
Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Zhang, Liang
77199a72-9bb0-4336-bbff-15c8e1b790cb
Karpouzas, Konstantinos
d796fbbc-2dbb-4244-8c06-ad6466a9abc0

Alabarta, Kevin, Méndez, Mariano, García, Federico, Peirano, Valentina, Altamirano, Diego, Zhang, Liang and Karpouzas, Konstantinos (2022) Variability and phase lags of the type-C quasi-periodic oscillation of MAXI J1348-630 with NICER. Monthly Notices of the Royal Astronomical Society, 514 (2), 2839 -2854. (doi:10.1093/mnras/stac1533). (In Press)

Record type: Article

Abstract

We study the properties of the type-C quasi-periodic oscillation (type-C QPO) of MAXI J1348–630 during its 2019 outburst and reflare with NICER. This is the first time that the evolution of the properties of type-C QPOs is studied during an outburst reflare. We found that the properties of the type-C QPO during the reflare are similar to those of type-C QPOs observed in other black hole systems during outburst. This suggests that the physical processes responsible for type-C QPOs are the same in a reflare and in an outburst. We also found that the full width at half-maximum of a high-frequency broad-band component observed during the reflare changes significantly with energy. We studied the energy-dependent fractional rms amplitude and phase lags of the type-C QPO from 0.5 to 12 keV. We found that the fractional rms amplitude increases up to 2–3 keV and then remains approximately constant above this energy, and the lag spectra of the type-C QPO are hard. We discuss the dependence of the fractional rms amplitude and phase lags with energy in the context of Comptonization as the radiative mechanism driving the QPO rms and lag spectra.

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2205.11581 - Accepted Manuscript
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More information

Accepted/In Press date: 23 May 2022
Additional Information: arXiv:2205.11581
Keywords: Accretion, Accretion discs, Black hole physics, X-rays: binaries, X-rays: individual: MAXI J1348-630

Identifiers

Local EPrints ID: 468768
URI: http://eprints.soton.ac.uk/id/eprint/468768
ISSN: 0035-8711
PURE UUID: 0e1140b3-af05-441e-b0fb-5d1b88aae73b
ORCID for Diego Altamirano: ORCID iD orcid.org/0000-0002-3422-0074

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Date deposited: 25 Aug 2022 16:52
Last modified: 27 Aug 2022 01:46

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Contributors

Author: Kevin Alabarta
Author: Mariano Méndez
Author: Federico García
Author: Valentina Peirano
Author: Liang Zhang

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