The Broadband X-Ray Spectrum of the X-Ray-obscured Type 1 AGN 2MASX J193013.80+341049.5

被引:5
|
作者
Kamraj, Nikita [1 ]
Balokovic, Mislav [2 ,3 ]
Brightman, Murray [1 ]
Stern, Daniel [4 ]
Harrison, Fiona A. [1 ]
Assef, Roberto J. [5 ]
Koss, Michael J. [6 ]
Oh, Kyuseok [7 ,8 ]
Walton, Dominic J. [9 ]
机构
[1] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA
[2] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA
[3] Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 USA
[4] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
[5] Univ Diego Portales, Fac Ingn & Ciencias, Nucleo Astron, Av Ejercito Libertador 441, Santiago, Chile
[6] Eureka Sci Inc, 2452 Delmer St,Suite 100, Oakland, CA 94602 USA
[7] Kyoto Univ, Dept Astron, Sakyo Ku, Oiwake Cho, Kyoto 6068502, Japan
[8] Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
[9] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
来源
ASTROPHYSICAL JOURNAL | 2019年 / 887卷 / 02期
基金
美国国家航空航天局;
关键词
ACTIVE GALACTIC NUCLEI; PHOTON IMAGING CAMERA; XMM-NEWTON; RESOLUTION; EMISSION; GALAXIES; SAMPLE; DUST; LINE;
D O I
10.3847/1538-4357/ab57fc
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present results from modeling the broadband X-ray spectrum of the Type 1 active galactic nucleus (AGN) 2MASX J193013.80+341049.5 using NuSTAR, Swift, and archival XMM-Newton observations. We find this source to be highly X-ray obscured, with column densities exceeding 10(23) cm(-2) across all epochs of X-ray observations, spanning an 8 yr period. However, the source exhibits prominent broad optical emission lines, consistent with an unobscured Type 1 AGN classification. We fit the X-ray spectra with both phenomenological reflection models and physically motivated torus models to model the X-ray absorption. We examine the spectral energy distribution of this source and investigate some possible scenarios to explain the mismatch between X-ray and optical classifications. We compare the ratio of reddening to X-ray absorbing column density (EB-V/N-H) and find that 2MASX J193013.80+341049.5 likely has a much lower dust-to-gas ratio relative to the Galactic interstellar medium, suggesting that the broad line region itself could provide the source of extra X-ray obscuration, being composed of low-ionization, dust-free gas.
引用
收藏
页数:10
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