Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31161
Title: | Time lags of the type-B QPO in MAXI J1348-630 | Authors: | BELLONI, Tomaso Maria Melchiorre Liang Zhang Nikolaos D. Kylafis Pablo Reig Diego Altamirano |
Issue Date: | 2020 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 496 | Issue: | 4 | First Page: | 4366 | Abstract: | The fast variability observed in the X-ray emission from black-hole binaries has a very complex phenomenology, but offers the possibility to investigate directly the properties of the inner accretion flow. In particular, type-B oscillations in the 2-8 Hz range, observed in the Soft-Intermediate state, have been associated to the emission from a relativistic jet. We present the results of the timing and spectral analysis of a set of observations of the bright transient MAXI J1348-630 made with the NICER telescope. The observations are in the brightest part of the outburst and all feature a strong type-B QPO at ~4.5 Hz. We compute the energy dependence of the fractional rms and the phase lags at the QPO frequency, obtaining high signal-to-noise data and sampling for the first time at energies below 2 keV. The fractional rms decreases from more than 10% at 9 keV to 0.6% at 1.5 keV, and is constant below that energy. Taking the 2-3 keV band as reference, photons at all energies show a hard lag, increasing with the distance from the reference band. The behaviour below 2 keV has never been observed before, due to the higher energy bandpass of previous timing instruments. The energy spectrum can be fitted with a standard model for this state, consisting of a thin disc component and a harder power law, plus an emission line between 6 and 7 keV. We discuss the results, concentrating on the phase lags, and show that they can be interpreted within a Comptonization model. | URI: | http://hdl.handle.net/20.500.12386/31161 | URL: | http://arxiv.org/abs/2006.12872v1 https://academic.oup.com/mnras/article/496/4/4366/5863226 |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/staa1843 | Bibcode ADS: | 2020MNRAS.496.4366B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
staa1843.pdf | Pdf editoriale | 372.81 kB | Adobe PDF | View/Open |
Page view(s)
32
checked on Jul 27, 2024
Download(s)
12
checked on Jul 27, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.