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The geometry of the...
The geometry of the hot corona in MCG-05-23-16 constrained by X-ray polarimetry
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- Tagliacozzo, D. (författare)
- Dipartimento di Matematica e Fisica, Universitadegli Studi Roma Tre, via della Va s c a Navale 84, I-00146 Roma, Italy
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- Veledina, Alexandra, 1987- (författare)
- Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland,Nordiska institutet för teoretisk fysik (Nordita)
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- Zane, S. (författare)
- Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK
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(creator_code:org_t)
- Oxford University Press (OUP), 2023
- 2023
- Engelska.
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Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 525:3, s. 4735-4743
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report on the second observation of the radio-quiet active galactic nucleus MCG-05-23-16 performed with the Imaging X-ray Polarimetry Explorer (IXPE). The observation started on 2022 November 6 for a net observing time of 640 ks, and was partly simultaneous with NuSTAR (86 ks). After combining these data with those obtained in the first IXPE pointing on 2022 May (simultaneous with XMM-Newton and NuSTAR) we find a 2-8 keV polarization degree Π = 1.6 ± 0.7 (at 68 per cent confidence level), which corresponds to an upper limit Π = 3.2 per cent (at 99 per cent confidence level). We then compare the polarization results with Monte Carlo simulations obtained with the monk code, with which different coronal geometries have been explored (spherical lamppost, conical, slab, and wedge). Furthermore, the allowed range of inclination angles is found for each geometry. If the best-fitting inclination value from a spectroscopic analysis is considered, a cone-shaped corona along the disc axis is disfavoured.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- galaxies: Active
- galaxies: Seyfert
- polarization
- X-rays: galaxies
- X-rays: individual: MCG-05-23-16
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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