A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

A combined timing/spectral study of IRAS 13224-3809 using XMM-Newton data

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA18-00533S" target="_blank" >GA18-00533S: Reverberace akrečních disků černých děr</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

1365-2966

e-ISSN

—

Svazek periodika

498

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

3184-3192

Kód UT WoS článku

000587752500010

EID výsledku v databázi Scopus

2-s2.0-85096866296