Fast infrared variability from the black hole candidate MAXI J1535-571 and tight constraints on the modelling

F. M. Vincentelli; P. Casella; D. M. Russell; M. C. Baglio; A. Veledina; T. MacCarone; J. Malzac; R. Fender; K. O'Brien; P. Uttley

doi:10.1093/mnras/stab475

Fast infrared variability from the black hole candidate MAXI J1535-571 and tight constraints on the modelling

F. M. Vincentelli, P. Casella, D. M. Russell, M. C. Baglio, A. Veledina, T. MacCarone, J. Malzac, R. Fender, K. O'Brien, P. Uttley

Physics

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Abstract

We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black hole transient MAXI J1535-571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays: 0.7-10 keV), VLT/HAWK-I (Ks band, 2.2 μm) and VLT/VISIR (M and PAH2_2 bands, 4.85 and 11.88 μm, respectively). The cross-correlation function between the X-ray and near-IR light curves shows a strong asymmetric anticorrelation dip at positive lags. We detect a near-IR QPO (2.5σ) at 2.07 ± 0.09 Hz simultaneously with an X-ray QPO at approximately the same frequency (f0 = 2.25 ± 0.05). From the cross-spectral analysis, a lag consistent with zero was measured between the two oscillations. We also measure a significant correlation between the average near-IR and mid-IR fluxes during the second night, but find no correlation on short time-scales. We discuss these results in terms of the two main scenarios for fast IR variability (hot inflow and jet powered by internal shocks). In both cases, our preliminary modelling suggests the presence of a misalignment between the disc and jet.

Original language	English (US)
Pages (from-to)	614-624
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	503
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stab475
State	Published - May 1 2021

Keywords

X-rays: binaries
accretion
accretion discs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stab475

Cite this

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title = "Fast infrared variability from the black hole candidate MAXI J1535-571 and tight constraints on the modelling",

abstract = "We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black hole transient MAXI J1535-571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays: 0.7-10 keV), VLT/HAWK-I (Ks band, 2.2 μm) and VLT/VISIR (M and PAH2_2 bands, 4.85 and 11.88 μm, respectively). The cross-correlation function between the X-ray and near-IR light curves shows a strong asymmetric anticorrelation dip at positive lags. We detect a near-IR QPO (2.5σ) at 2.07 ± 0.09 Hz simultaneously with an X-ray QPO at approximately the same frequency (f0 = 2.25 ± 0.05). From the cross-spectral analysis, a lag consistent with zero was measured between the two oscillations. We also measure a significant correlation between the average near-IR and mid-IR fluxes during the second night, but find no correlation on short time-scales. We discuss these results in terms of the two main scenarios for fast IR variability (hot inflow and jet powered by internal shocks). In both cases, our preliminary modelling suggests the presence of a misalignment between the disc and jet.",

keywords = "X-rays: binaries, accretion, accretion discs",

author = "Vincentelli, {F. M.} and P. Casella and Russell, {D. M.} and Baglio, {M. C.} and A. Veledina and T. MacCarone and J. Malzac and R. Fender and K. O'Brien and P. Uttley",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2021",

month = may,

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doi = "10.1093/mnras/stab475",

language = "English (US)",

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T1 - Fast infrared variability from the black hole candidate MAXI J1535-571 and tight constraints on the modelling

AU - Vincentelli, F. M.

AU - Casella, P.

AU - Russell, D. M.

AU - Baglio, M. C.

AU - Veledina, A.

AU - MacCarone, T.

AU - Malzac, J.

AU - Fender, R.

AU - O'Brien, K.

AU - Uttley, P.

PY - 2021/5/1

Y1 - 2021/5/1

N2 - We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black hole transient MAXI J1535-571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays: 0.7-10 keV), VLT/HAWK-I (Ks band, 2.2 μm) and VLT/VISIR (M and PAH2_2 bands, 4.85 and 11.88 μm, respectively). The cross-correlation function between the X-ray and near-IR light curves shows a strong asymmetric anticorrelation dip at positive lags. We detect a near-IR QPO (2.5σ) at 2.07 ± 0.09 Hz simultaneously with an X-ray QPO at approximately the same frequency (f0 = 2.25 ± 0.05). From the cross-spectral analysis, a lag consistent with zero was measured between the two oscillations. We also measure a significant correlation between the average near-IR and mid-IR fluxes during the second night, but find no correlation on short time-scales. We discuss these results in terms of the two main scenarios for fast IR variability (hot inflow and jet powered by internal shocks). In both cases, our preliminary modelling suggests the presence of a misalignment between the disc and jet.

AB - We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black hole transient MAXI J1535-571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays: 0.7-10 keV), VLT/HAWK-I (Ks band, 2.2 μm) and VLT/VISIR (M and PAH2_2 bands, 4.85 and 11.88 μm, respectively). The cross-correlation function between the X-ray and near-IR light curves shows a strong asymmetric anticorrelation dip at positive lags. We detect a near-IR QPO (2.5σ) at 2.07 ± 0.09 Hz simultaneously with an X-ray QPO at approximately the same frequency (f0 = 2.25 ± 0.05). From the cross-spectral analysis, a lag consistent with zero was measured between the two oscillations. We also measure a significant correlation between the average near-IR and mid-IR fluxes during the second night, but find no correlation on short time-scales. We discuss these results in terms of the two main scenarios for fast IR variability (hot inflow and jet powered by internal shocks). In both cases, our preliminary modelling suggests the presence of a misalignment between the disc and jet.

KW - X-rays: binaries

KW - accretion

KW - accretion discs

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Fast infrared variability from the black hole candidate MAXI J1535-571 and tight constraints on the modelling

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Keywords

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