2023MNRAS.525.5437I

Query : 2023MNRAS.525.5437I

2023MNRAS.525.5437I - Mon. Not. R. Astron. Soc., 525, 5437-5449 (2023/November-2)

The X-ray polarization of the Seyfert 1 galaxy IC 4329A.

INGRAM A., EWING M., MARINUCCI A., TAGLIACOZZO D., ROSARIO D.J., VELEDINA A., KIM D.E., MARIN F., BIANCHI S., POUTANEN J., MATT G., MARSHALL H.L., URSINI F., DE ROSA A., PETRUCCI P.-O., MADEJSKI G., BARNOUIN T., DI GESU L., DOVCIAK M., GIANOLLI V.E., KRAWCZYNSKI H., LOKTEV V., MIDDEI R., PODGORNY J., PUCCETTI S., RATHEESH A., SOFFITTA P., TOMBESI F., EHLERT S.R., MASSARO F., AGUDO I., ANTONELLI L.A., BACHETTI M., BALDINI L., 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., ENOTO T., EVANGELISTA Y., FABIANI S., FERRAZZOLI R., GARCIA J.A., GUNJI S., HEYL J., IWAKIRI W., JORSTAD S.G., KAARET P., KARAS V., KISLAT F., KITAGUCHI T., KOLODZIEJCZAK J.J., LA MONACA F., LATRONICO L., LIODAKIS I., MALDERA S., MANFREDA A., MARSCHER A.P., MITSUISHI I., MIZUNO T., MULERI F., 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., ROBERTS O.J., ROMANI R.W., SGRO 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. and ZANE S.

Abstract (from CDS):

We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging X-ray Polarimetry Explorer (IXPE) observed the source for ∼500 ks, supported by XMM-Newton (∼60 ks) and NuSTAR (∼80 ks) exposures. We detect polarization in the 2-8 keV band with 2.97σ confidence. We report a polarization degree of 3.3 ± 1.1 per cent and a polarization angle of 78° ± 10° (errors are 1σ confidence). The X-ray polarization is consistent with being aligned with the radio jet, albeit partially due to large uncertainties on the radio position angle. We jointly fit the spectra from the three observatories to constrain the presence of a relativistic reflection component. From this, we obtain constraints on the inclination angle to the inner disc (<39° at 99 per cent confidence) and the disc inner radius (<11 gravitational radii at 99 per cent confidence), although we note that modelling systematics in practice add to the quoted statistical error. Our spectropolarimetric modelling indicates that the 2-8 keV polarization is consistent with being dominated by emission directly observed from the X-ray corona, but the polarization of the reflection component is completely unconstrained. Our constraints on viewer inclination and polarization degree tentatively favour more asymmetric, possibly out-flowing, coronal geometries that produce more highly polarized emission, but the coronal geometry is unconstrained at the 3σ level.

Abstract Copyright: © The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): polarization - galaxies: active - galaxies: individual: IC 4329A - galaxies: Seyfert

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MCG-05-23-016 Sy2 09 47 40.1332188528 -30 56 55.960779696   14.10 13.69 12.44   ~ 611 0
2 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
3 IC 4329 BiC 13 49 05.314 -30 17 45.20   11.96 11.54 10.31   ~ 192 2
4 IC 4329A Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 876 1
5 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
6 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
7 V* V1341 Cyg LXB 21 44 41.1544345272 +38 19 17.066570988 15.00 15.13 14.68 15.00   A9III 1229 1

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