Theoretical modelling of the AGN iron line vs. continuum time-lags in the lamp-post geometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F16%3A00471325" target="_blank" >RIV/67985815:_____/16:00471325 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985815:_____/16:00488884

Výsledek na webu

<a href="http://dx.doi.org/10.1051/0004-6361/201527748" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201527748</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201527748" target="_blank" >10.1051/0004-6361/201527748</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Theoretical modelling of the AGN iron line vs. continuum time-lags in the lamp-post geometry

Popis výsledku v původním jazyce

We estimate time-lags as accurately as possible and fit them with theoretical models in the context of the lamp-post geometry. We also constrain the geometry of the X-ray emitting region in AGN. Given the available data, time-lags between the two energy bands can only be reliably measured at frequencies between similar to 5 x 10(-5) Hz and similar to 10(-3) Hz. The power-law and reverberation time-lag models can both fit the data well in terms of formal statistical characteristics. When fitting the observed time-lags to the lamp-post reverberation scenario, we can only constrain the height of the X-ray source. The data require, or are consistent with, a small (less than or similar to 10 gravitational radii) X-ray source height. In principle, the 5-7 keV band, which contains most of the Fe K alpha line emission, could be an ideal band for studying reverberation effects, as it is expected to be dominated by the X-ray reflection component. We here carried out the best possible analysis with XMM-Newton data. Time-lags can be reliably estimated over a relatively narrow frequency range, and their errors are rather large. Nevertheless, our results are consistent with the hypothesis of X-ray reflection from the inner accretion disc.nn

Název v anglickém jazyce

Theoretical modelling of the AGN iron line vs. continuum time-lags in the lamp-post geometry

Popis výsledku anglicky

We estimate time-lags as accurately as possible and fit them with theoretical models in the context of the lamp-post geometry. We also constrain the geometry of the X-ray emitting region in AGN. Given the available data, time-lags between the two energy bands can only be reliably measured at frequencies between similar to 5 x 10(-5) Hz and similar to 10(-3) Hz. The power-law and reverberation time-lag models can both fit the data well in terms of formal statistical characteristics. When fitting the observed time-lags to the lamp-post reverberation scenario, we can only constrain the height of the X-ray source. The data require, or are consistent with, a small (less than or similar to 10 gravitational radii) X-ray source height. In principle, the 5-7 keV band, which contains most of the Fe K alpha line emission, could be an ideal band for studying reverberation effects, as it is expected to be dominated by the X-ray reflection component. We here carried out the best possible analysis with XMM-Newton data. Time-lags can be reliably estimated over a relatively narrow frequency range, and their errors are rather large. Nevertheless, our results are consistent with the hypothesis of X-ray reflection from the inner accretion disc.nn

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/7E13003" target="_blank" >7E13003: High-Resolution Solar Physics Network</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

594

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

17

Strana od-do

"A71/1"-"A71/17"

Kód UT WoS článku

000385832200038

EID výsledku v databázi Scopus

2-s2.0-84991607776