A1 Refereed original research article in a scientific journal
The geometry of the hot corona in MCG-05-23-16 constrained by X-ray polarimetry
Authors: Tagliacozzo D., Marinucci A., Ursini F., Matt G., Bianchi S., Baldini L., Barnouin T., Cavero Rodriguez N., De Rosa A., Di Gesu L., Dovčiak M., Harper D., Ingram A., Karas V., Kim D.E., Krawczynski H., Madejski G., Marin F., Middei R., Marshall H.L., Muleri F., Panagiotou C., Petrucci P.O., Podgorny J., Poutanen J., Puccetti S., Soffitta P., Tombesi F., Veledina A., Zhang W., Agudo I., Antonelli L.A., Bachetti M., Baumgartner W.H., Bellazzini R., Bongiorno S.D., Bonino R., Brez A., Bucciantini N., Capitanio F., Castellano S., Cavazzuti E., Chen C.T., Ciprini S., Costa E., Del Monte E., Di Lalla N., Di Marco A., Donnarumma I., Doroshenko V., Ehlert S.R., Enoto T., Evangelista Y., Fabiani S., Ferrazzoli R., Garcia J.A., Gunji S., Heyl J., Iwakiri W., Jorstad S.G., Kaaret P., Kislat F., Kitaguchi T., Kolodziejczak J.J., La Monaca F., Latronico L., Liodakis I., Maldera S., Manfreda A., Marscher A.P., Massaro F., Mitsuishi I., Mizuno T., Negro M., Ng C.Y., O'Dell S.L., Omodei N., Oppedisano C., Papitto A., Pavlov G.G., Peirson A.L., Perri M., Pesce-Rollins M., Pilia M., Possenti A., Ramsey B.D., Rankin J., Ratheesh A., Roberts O.J., Romani R.W., Sgrò C., Slane P., Spandre G., Swartz D.A., Tamagawa T., Tavecchio F., Taverna R., Tawara Y., Tennant A.F., Thomas N.E., Trois A., Tsygankov S.S., Turolla R., Vink J., Weisskopf M.C., Wu K., Xie F., Zane S.
Publisher: Oxford University Press
Publication year: 2023
Journal: Monthly Notices of the Royal Astronomical Society
Journal name in source: Monthly Notices of the Royal Astronomical Society
Volume: 525
Issue: 3
First page : 4735
Last page: 4743
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/stad2627
Web address : https://academic.oup.com/mnras/article/525/3/4735/7258658
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/181482679
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.
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