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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2023

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

V. E. Gianolli (1) , D. E. Kim , S. Bianchi , B. Agís-González , G. Madejski , F. Marin (2) , A. Marinucci , G. Matt , R. Middei , P. -O. Petrucci (1) , P. Soffitta , D. Tagliacozzo , F. Tombesi , F. Ursini , T. Barnouin (2) , A. De Rosa , L. Di Gesu , A. Ingram , V. Loktev , C. Panagiotou , J. Podgorny (2) , J. Poutanen , S. Puccetti , A. Ratheesh , A. Veledina , W. Zhang , I. Agudo , L. A. Antonelli , M. Bachetti , L. Baldini , W. H. Baumgartner , R. Bellazzini , S. D. Bongiorno , R. Bonino , A. Brez , N. Bucciantini , F. Capitanio , S. Castellano , E. Cavazzuti , C. -T. Chen , S. Ciprini , E. Costa , E. del Monte , N. Di Lalla , A. Di Marco , I. Donnarumma , V. Doroshenko , M. Dovčiak , S. R. Ehlert , T. Enoto , Y. Evangelista , S. Fabiani , R. Ferrazzoli , J. A. García , S. Gunji , J. Heyl , W. Iwakiri , S. G. Jorstad , P. Kaaret , V. Karas , F. Kislat , T. Kitaguchi , J. J. Kolodziejczak , H. Krawczynski , F. La Monaca , L. Latronico , I. Liodakis , S. Maldera , A. Manfreda , A. P. Marscher , H. L. Marshall , F. Massaro , I. Mitsuishi , T. Mizuno , F. Muleri , M. Negro , C. -Y. Ng , S. L. O'Dell , N. Omodei , C. Oppedisano , A. Papitto , G. G. Pavlov , A. L. Peirson , M. Perri , M. Pesce-Rollins , M. Pilia , A. Possenti , B. D. Ramsey , J. Rankin , O. J. Roberts , R. W. Romani , C. Sgrò , P. Slane , G. Spandre , D. A. Swartz , T. Tamagawa , F. Tavecchio , R. Taverna , Y. Tawara , A. F. Tennant , N. E. Thomas , A. Trois , S. S. Tsygankov , R. Turolla , J. Vink , M. C. Weisskopf , K. Wu , F. Xie , S. Zane
D. E. Kim
  • Function : Author
S. Bianchi
  • Function : Author
B. Agís-González
  • Function : Author
G. Madejski
  • Function : Author
A. Marinucci
  • Function : Author
G. Matt
  • Function : Author
R. Middei
  • Function : Author
P. Soffitta
  • Function : Author
D. Tagliacozzo
  • Function : Author
F. Tombesi
  • Function : Author
F. Ursini
  • Function : Author
A. De Rosa
  • Function : Author
L. Di Gesu
  • Function : Author
A. Ingram
  • Function : Author
V. Loktev
  • Function : Author
C. Panagiotou
  • Function : Author
J. Poutanen
  • Function : Author
S. Puccetti
  • Function : Author
A. Ratheesh
  • Function : Author
A. Veledina
  • Function : Author
W. Zhang
  • Function : Author
I. Agudo
  • Function : Author
L. A. Antonelli
  • Function : Author
M. Bachetti
  • Function : Author
L. Baldini
  • Function : Author
W. H. Baumgartner
  • Function : Author
R. Bellazzini
  • Function : Author
S. D. Bongiorno
  • Function : Author
R. Bonino
  • Function : Author
A. Brez
  • Function : Author
N. Bucciantini
  • Function : Author
F. Capitanio
  • Function : Author
S. Castellano
  • Function : Author
E. Cavazzuti
  • Function : Author
C. -T. Chen
  • Function : Author
S. Ciprini
  • Function : Author
E. Costa
  • Function : Author
E. del Monte
  • Function : Author
N. Di Lalla
  • Function : Author
A. Di Marco
  • Function : Author
I. Donnarumma
  • Function : Author
V. Doroshenko
  • Function : Author
M. Dovčiak
  • Function : Author
S. R. Ehlert
  • Function : Author
T. Enoto
  • Function : Author
Y. Evangelista
  • Function : Author
S. Fabiani
  • Function : Author
R. Ferrazzoli
  • Function : Author
J. A. García
  • Function : Author
S. Gunji
  • Function : Author
J. Heyl
  • Function : Author
W. Iwakiri
  • Function : Author
S. G. Jorstad
  • Function : Author
P. Kaaret
  • Function : Author
V. Karas
  • Function : Author
F. Kislat
  • Function : Author
T. Kitaguchi
  • Function : Author
J. J. Kolodziejczak
  • Function : Author
H. Krawczynski
  • Function : Author
F. La Monaca
  • Function : Author
L. Latronico
  • Function : Author
I. Liodakis
  • Function : Author
S. Maldera
  • Function : Author
A. Manfreda
  • Function : Author
A. P. Marscher
  • Function : Author
H. L. Marshall
  • Function : Author
F. Massaro
  • Function : Author
I. Mitsuishi
  • Function : Author
T. Mizuno
  • Function : Author
F. Muleri
  • Function : Author
M. Negro
  • Function : Author
C. -Y. Ng
  • Function : Author
S. L. O'Dell
  • Function : Author
N. Omodei
  • Function : Author
C. Oppedisano
  • Function : Author
A. Papitto
  • Function : Author
G. G. Pavlov
  • Function : Author
A. L. Peirson
  • Function : Author
M. Perri
  • Function : Author
M. Pesce-Rollins
  • Function : Author
M. Pilia
  • Function : Author
A. Possenti
  • Function : Author
B. D. Ramsey
  • Function : Author
J. Rankin
  • Function : Author
O. J. Roberts
  • Function : Author
R. W. Romani
  • Function : Author
C. Sgrò
  • Function : Author
P. Slane
  • Function : Author
G. Spandre
  • Function : Author
D. A. Swartz
  • Function : Author
T. Tamagawa
  • Function : Author
F. Tavecchio
  • Function : Author
R. Taverna
  • Function : Author
Y. Tawara
  • Function : Author
A. F. Tennant
  • Function : Author
N. E. Thomas
  • Function : Author
A. Trois
  • Function : Author
S. S. Tsygankov
  • Function : Author
R. Turolla
  • Function : Author
J. Vink
  • Function : Author
M. C. Weisskopf
  • Function : Author
K. Wu
  • Function : Author
F. Xie
  • Function : Author
S. Zane
  • Function : Author

Abstract

We present an X-ray spectro-polarimetric 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 Π = 4.9 ± 1.1% and angle Ψ = 86 ± 7 east of north (68% confidence level) are measured in the 2-8 keV energy range. The spectro-polarimetric 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%) polarization degree. Assuming more reasonable values, a polarization degree of the hot corona ranging from ~4 to ~8% 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 AGN with an X-ray polarization measure for the corona, illustrating the capabilities of X-ray polarimetry and IXPE in unveiling its geometry.
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Dates and versions

insu-04135604 , version 1 (24-05-2024)

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V. E. Gianolli, D. E. Kim, S. Bianchi, B. Agís-González, G. Madejski, et al.. Uncovering the geometry of the hot X-ray corona in the seyfert galaxy NGC 4151 with IXPE. Monthly Notices of the Royal Astronomical Society, 2023, ⟨10.1093/mnras/stad1697⟩. ⟨insu-04135604⟩
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