The Complex X-Ray Obscuration Environment in the Radio-loud Type 2 Quasar 3C 223

被引:4
|
作者
LaMassa, Stephanie M. M. [1 ]
Yaqoob, Tahir [2 ,3 ]
Tzanavaris, Panayiotis [2 ,4 ,5 ]
Gandhi, Poshak [6 ,7 ]
Heckman, Timothy [8 ]
Lansbury, George [9 ]
Siemiginowska, Aneta [10 ]
机构
[1] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
[2] Univ Maryland Baltimore Cty, CRESST, 1000 Hilltop Circle, Baltimore, MD 21250 USA
[3] Goddard Spaceflight Ctr, NASA, Mail Code 662, Greenbelt, MD 20771 USA
[4] Univ Maryland Baltimore Cty, 1000 Hilltop Circle, Baltimore, MD 21250 USA
[5] Goddard Spaceflight Ctr, Lab X ray Astrophys, NASA, Mail Code 662, Greenbelt, MD 20771 USA
[6] Univ Southampton, Sch Phys & Astron, Highfield, Southampton SO17 1BJ, England
[7] Interuniv Ctr Astron & Astrophys, Post Bag 4, Ganeshkhind, Pune 411007, India
[8] Johns Hopkins Univ, Ctr Astrophys Sci, Dept Phys & Astron, Baltimore, MD 21218 USA
[9] European Southern Observ, Karl Schwarzschild str 2, D-85748 Garching, Germany
[10] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA
来源
ASTROPHYSICAL JOURNAL | 2023年 / 944卷 / 02期
基金
美国国家航空航天局;
关键词
ACTIVE GALACTIC NUCLEI; SUPERMASSIVE BLACK-HOLES; COMPTON-THICK AGN; K-ALPHA LINE; XMM-NEWTON OBSERVATIONS; EXTENDED OPTICAL-LINE; CHANDRA OBSERVATIONS; NUSTAR OBSERVATIONS; SEYFERT-GALAXIES; INTERSTELLAR EXTINCTION;
D O I
10.3847/1538-4357/acb3bb
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
3C 223 is a radio-loud, Type 2 quasar at z = 0.1365 with an intriguing X-ray Multi-mirror Mission (XMM)-Newton spectrum that implicated it as a rare, Compton-thick (N (H) greater than or similar to 1.25 x 10(24) cm(-2)) active galactic nucleus (AGN). We obtained contemporaneous XMM-Newton and Nuclear Spectroscopic Telescope Array (NuSTAR) spectra to fit the broadband X-ray spectrum with the physically motivated MYTorus and borus02 models. We confirm earlier results that the obscuring gas is patchy with both high (though not Compton-thick) levels of obscuration (N (H) > 10(23) cm(-2)) and gas clouds with column densities up to an order of magnitude lower. The spectral fitting results indicate additional physical processes beyond those modeled in the spectral grids of MYTorus and borus02 impact the emergent spectrum: the Compton-scattering region may be extended beyond the putative torus; a ring of heavy Compton-thick material blocks most X-ray emission along the line of sight; or the radio jet is beamed, boosting the production of Fe K alpha line photons in the global medium compared with what is observed along the line of sight. We revisit a recent claim that no radio-loud Compton-thick AGN have yet been conclusively shown to exist, finding three reported cases of radio-loud AGN with global average (but not line-of-sight) column densities that are Compton thick. Now that it is possible to separately determine line-of-sight and global column densities, inhomogeneity in the obscuring medium has consequences for how we interpet the spectrum and classify an AGN as "Compton thick."
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页数:19
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