Seyfert星系中X射线电晕的极化约束：MCG-05-23-16

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Seyfert星系中X射线电晕的极化约束：MCG-05-23-16

Polarization constraints on the X-ray corona in Seyfert Galaxies: MCG-05-23-16

论文作者

Marinucci, A., Muleri, F., Dovčiak, M., Bianchi, S., Marin, F., Matt, G., Ursini, F., Middei, R., Marshall, H. L., Baldini, L., Barnouin, T., Rodriguez, N. Cavero, De Rosa, A., Di Gesu, L., Harper, D., Ingram, A., Karas, V., Krawczynski, H., Madejski, G., Panagiotou, C., Petrucci, P. O., Podgorny, J., Puccetti, S., 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., 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., Hayashida, K., Heyl, J., Iwakiri, W., Jorstad, S. G., Kitaguchi, T., Kolodziejczak, J. J., La Monaca, F., Latronico, L., Liodakis, I., Maldera, S., Manfreda, A., Marscher, A. P., Mitsuishi, I., Mizuno, T., 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., Poutanen, J., Ramsey, B. D., Rankin, J., Ratheesh, A., Romani, R. W., Sgrò, C., Slane, P., Soffitta, P., Spandre, G., 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.

论文摘要

我们报告了使用偏振X射线：Seyfert 1.9 Galaxy MCG-05-23-16对射电压活性银河核（AGN）的首次观察。该源用成像X射线极化探索器（IXPE）指向2022年5月14日，净观察时间为486 KS，与XMM-Newton（58 KS）和Nustar（83 KS）同时。小于$π<4.7 \％$（在99％C.L.）的极化程度衍生在2-8 KEV能量范围内，在2-8 keV能量范围内，发射由归因于热电晕的主要成分主导。从同时拟合到IXPE，NUSTAR和XMM-NEWTON数据的宽带频谱，由具有光子索引$γ= 1.85 \ pm0.01 $的功率定律很好地复制，并且高功能截止量$ e _ {\ rm c} = 120 = 120 = 120 \ pm15 $ pp pm15 $ kev。与蒙特卡洛模拟的比较表明，电晕的灯柱和圆锥形几何形状与观察到的上限一致，只有在系统的倾斜角度小于50 $^{\ circ} $的情况下才允许平板几何形状。

We report on the first observation of a radio-quiet Active Galactic Nucleus (AGN) using polarized X-rays: the Seyfert 1.9 galaxy MCG-05-23-16. This source was pointed with the Imaging X-ray Polarimetry Explorer (IXPE) starting on May 14, 2022 for a net observing time of 486 ks, simultaneously with XMM-Newton (58 ks) and NuSTAR (83 ks). A polarization degree smaller than $Π<4.7\%$ (at the 99% c.l.) is derived in the 2-8 keV energy range, where emission is dominated by the primary component ascribed to the hot corona. The broad-band spectrum, inferred from a simultaneous fit to the IXPE, NuSTAR, and XMM-Newton data, is well reproduced by a power law with photon index $Γ=1.85\pm0.01$ and a high-energy cutoff $E_{\rm C}=120\pm15$ keV. A comparison with Monte Carlo simulations shows that a lamp-post and a conical geometry of the corona are consistent with the observed upper limit, a slab geometry is allowed only if the inclination angle of the system is less than 50$^{\circ}$.

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