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

• DOI: 10.1093/mnras/stac1533
• Publication Date: 2022-06-09T15:43:42Z
• Authors: Kevin Alabarta; Mariano Méndez; Federico García; Valentina Peirano; Diego Altamirano; Liang Zhang; Konstantinos Karp...
• Keywords: Oscillation (cell signaling); Quasi periodic

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