Vincentelli, F M and Casella, P and Russell, D M and Baglio, M C and Veledina, A and Maccarone, T and Malzac, J and Fender, R and O’Brien, K and Uttley, P (2021) 'Fast infrared variability from the black hole candidate MAXI J1535−571 and tight constraints on the modelling.', Monthly Notices of the Royal Astronomical Society, 503 (1). pp. 614-624.
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.
|Full text:||(VoR) Version of Record|
Available under License - Creative Commons Attribution 4.0.
Download PDF (1387Kb)
|Publisher Web site:||https://doi.org/10.1093/mnras/stab475|
|Publisher statement:||© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.|
|Date accepted:||11 February 2021|
|Date deposited:||16 November 2021|
|Date of first online publication:||19 February 2021|
|Date first made open access:||16 November 2021|
Save or Share this output
|Look up in GoogleScholar|