Uncovering the geometry of the hot X-ray corona in the Seyfert galaxy NGC 4151 with IXPE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00575159" target="_blank" >RIV/67985815:_____/23:00575159 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10476231

Výsledek na webu

<a href="https://doi.org/0.1093/mnras/stad1697" target="_blank" >https://doi.org/0.1093/mnras/stad1697</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stad1697" target="_blank" >10.1093/mnras/stad1697</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Uncovering the geometry of the hot X-ray corona in the Seyfert galaxy NGC 4151 with IXPE

Popis výsledku v původním jazyce

We present an X-ray spectropolarimetric analysis of the bright Seyfert galaxy NGC 4151. The source has been observed with the Imaging X-ray Polarimetry Explorer (IXPE) for 700 ks, complemented with simultaneous XMM-Newton (50 ks) and NuSTAR (100 ks) pointings. A polarization degree & pi, = 4.9 & PLUSMN, 1.1 per cent and angle & psi, = 86 & DEG, & PLUSMN, 7 & DEG, east of north (68 per cent confidence level) are measured in the 2-8 keV energy range. The spectropolarimetric analysis shows that the polarization could be entirely due to reflection. Given the low reflection flux in the IXPE band, this requires, however, a reflection with a very large (>38 per cent) polarization degree. Assuming more reasonable values, a polarization degree of the hot corona ranging from & SIM, 4 to & SIM 8 per cent is found. The observed polarization degree excludes a 'spherical' lamppost geometry for the corona, suggesting instead a slab-like geometry, possibly a wedge, as determined via Monte Carlo simulations. This is further confirmed by the X-ray polarization angle, which coincides with the direction of the extended radio emission in this source, supposed to match the disc axis. NGC 4151 is the first active galactic nucleus with an X-ray polarization measure for the corona, illustrating the capabilities of X-ray polarimetry and IXPE in unveiling its geometry.

Název v anglickém jazyce

Uncovering the geometry of the hot X-ray corona in the Seyfert galaxy NGC 4151 with IXPE

Popis výsledku anglicky

We present an X-ray spectropolarimetric analysis of the bright Seyfert galaxy NGC 4151. The source has been observed with the Imaging X-ray Polarimetry Explorer (IXPE) for 700 ks, complemented with simultaneous XMM-Newton (50 ks) and NuSTAR (100 ks) pointings. A polarization degree & pi, = 4.9 & PLUSMN, 1.1 per cent and angle & psi, = 86 & DEG, & PLUSMN, 7 & DEG, east of north (68 per cent confidence level) are measured in the 2-8 keV energy range. The spectropolarimetric analysis shows that the polarization could be entirely due to reflection. Given the low reflection flux in the IXPE band, this requires, however, a reflection with a very large (>38 per cent) polarization degree. Assuming more reasonable values, a polarization degree of the hot corona ranging from & SIM, 4 to & SIM 8 per cent is found. The observed polarization degree excludes a 'spherical' lamppost geometry for the corona, suggesting instead a slab-like geometry, possibly a wedge, as determined via Monte Carlo simulations. This is further confirmed by the X-ray polarization angle, which coincides with the direction of the extended radio emission in this source, supposed to match the disc axis. NGC 4151 is the first active galactic nucleus with an X-ray polarization measure for the corona, illustrating the capabilities of X-ray polarimetry and IXPE in unveiling its geometry.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

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

0035-8711

e-ISSN

1365-2966

Svazek periodika

523

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

4468-4476

Kód UT WoS článku

001023556700020

EID výsledku v databázi Scopus

2-s2.0-85163967361