A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00537379" target="_blank" >RIV/67985815:_____/20:00537379 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/staa2554" target="_blank" >https://doi.org/10.1093/mnras/staa2554</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/staa2554" target="_blank" >10.1093/mnras/staa2554</a>
Alternative languages
Result language
angličtina
Original language name
A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data
Original language description
We present the results from an X-ray variability study of IRAS 13224-3809. This is probably the best source for X-ray reverberation studies since it is X-ray bright, extremely variable, and it has been extensively observed with XMM-Newton. We used all the archival XMM-Newton data from the three EPIC cameras (to increase the signal to noise) and, given the many observations of the source, we were able to compute the time lags spectra in three different flux levels/periods. We fitted the time lags and energy spectra, simultaneously, using a new X-ray reverberation code that computes the time-dependent reflection spectra of the disc as a response to an X-ray flash from a point source located on the axis of the black hole (BH) accretion disc (lamp-post geometry). To the best of our knowledge, this is the first time for active galactic nuclei that both time lags and energy spectra are fitted by a model simultaneously in different flux periods. The model fits in the case when the BH is rapidly rotating are significantly better than the model fits in the case of a Schwarzschild BH. This result strongly favours the hypothesis of a rotating central BH in this source. We also detect significant variations in the height of the X-ray corona. The X-ray height appears to increase from similar to 3-5 gravitational radii when the X-ray luminosity is of the order of similar to 1.5-3 per cent of the Eddington limit, up to similar to 10 gravitational radii, when the luminosity doubles.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA18-00533S" target="_blank" >GA18-00533S: Reverberation from Black Hole accretion discs</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
1365-2966
e-ISSN
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Volume of the periodical
498
Issue of the periodical within the volume
3
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
3184-3192
UT code for WoS article
000587752500010
EID of the result in the Scopus database
2-s2.0-85096866296