The corona of the broad-line radio galaxy 3C 390.3
Abstract
We present the results from a joint Suzaku/NuSTAR broadband spectral analysis of 3C 390.3. The high quality data enables us to clearly separate the primary continuum from the reprocessed components allowing us to detect a high energy spectral cut-off ($${E}_{\mathrm{cut}}={117}_{-14}^{+18}$$ keV), and to place constraints on the Comptonization parameters of the primary continuum for the first time. The hard over soft compactness is $${69}_{-24}^{+124}$$ and the optical depth is $${4.1}_{-3.6}^{+0.5},$$ this leads to an electron temperature of $${30}_{-8}^{+32}$$ keV. Expanding our study of the Comptonization spectrum to the optical/UV by studying the simultaneous Swift-UVOT data, we find indications that the compactness of the corona allows only a small fraction of the total UV/optical flux to be Comptonized. Our analysis of the reprocessed emission show that 3C 390.3 only has a small amount of reflection (R ~ 0.3), and of that the vast majority is from distant neutral matter. Furthermore, we also discover a soft-X-ray excess in the source, which can be described by a weak ionized reflection component from the inner parts of the accretion disk. In addition to the backscattered emission, we also detect the highly ionized iron emission lines Fe xxv and Fe xxvi.
- Authors:
-
- Univ. of Cambridge, Cambridge (United Kingdom)
- California Inst. of Technology (CalTech), Pasadena, CA (United States)
- Univ. of Maryland, College Park, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- Caltech, Pasadena, CA (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Univ. of California, Berkeley, CA (United States)
- Danish Technical Univ., Lyngby (Denmark)
- Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Stanford Univ., Stanford, CA (United States)
- Univ. degli Studi Roma Tre, Roma (Italy)
- Univ. of Maryland, College Park, MD (United States)
- Univ. degli Studi Roma Tre, Roma (Italy); Univ. Grenoble Alpes, Grenoble (France)
- NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1313942
- Report Number(s):
- SLAC-PUB-16800
Journal ID: ISSN 1538-4357; arXiv:1510.01333
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 814; Journal Issue: 1; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; galaxies: active; X-rays: individual (3C 390.3)
Citation Formats
Lohfink, A. M., Ogle, P., Tombesi, F., Walton, D., Balokovic, M., Zoghbi, A., Ballantyne, D. R., Boggs, S. E., Christensen, F. E., Craig, W. W., Fabian, A. C., Hailey, C. J., Harrison, F. A., King, A. L., Madejski, G., Matt, G., Reynolds, C. S., Stern, D., Ursini, F., and Zhang, W. W. The corona of the broad-line radio galaxy 3C 390.3. United States: N. p., 2015.
Web. doi:10.1088/0004-637X/814/1/24.
Lohfink, A. M., Ogle, P., Tombesi, F., Walton, D., Balokovic, M., Zoghbi, A., Ballantyne, D. R., Boggs, S. E., Christensen, F. E., Craig, W. W., Fabian, A. C., Hailey, C. J., Harrison, F. A., King, A. L., Madejski, G., Matt, G., Reynolds, C. S., Stern, D., Ursini, F., & Zhang, W. W. The corona of the broad-line radio galaxy 3C 390.3. United States. https://doi.org/10.1088/0004-637X/814/1/24
Lohfink, A. M., Ogle, P., Tombesi, F., Walton, D., Balokovic, M., Zoghbi, A., Ballantyne, D. R., Boggs, S. E., Christensen, F. E., Craig, W. W., Fabian, A. C., Hailey, C. J., Harrison, F. A., King, A. L., Madejski, G., Matt, G., Reynolds, C. S., Stern, D., Ursini, F., and Zhang, W. W. Fri .
"The corona of the broad-line radio galaxy 3C 390.3". United States. https://doi.org/10.1088/0004-637X/814/1/24. https://www.osti.gov/servlets/purl/1313942.
@article{osti_1313942,
title = {The corona of the broad-line radio galaxy 3C 390.3},
author = {Lohfink, A. M. and Ogle, P. and Tombesi, F. and Walton, D. and Balokovic, M. and Zoghbi, A. and Ballantyne, D. R. and Boggs, S. E. and Christensen, F. E. and Craig, W. W. and Fabian, A. C. and Hailey, C. J. and Harrison, F. A. and King, A. L. and Madejski, G. and Matt, G. and Reynolds, C. S. and Stern, D. and Ursini, F. and Zhang, W. W.},
abstractNote = {We present the results from a joint Suzaku/NuSTAR broadband spectral analysis of 3C 390.3. The high quality data enables us to clearly separate the primary continuum from the reprocessed components allowing us to detect a high energy spectral cut-off (${E}_{\mathrm{cut}}={117}_{-14}^{+18}$ keV), and to place constraints on the Comptonization parameters of the primary continuum for the first time. The hard over soft compactness is ${69}_{-24}^{+124}$ and the optical depth is ${4.1}_{-3.6}^{+0.5},$ this leads to an electron temperature of ${30}_{-8}^{+32}$ keV. Expanding our study of the Comptonization spectrum to the optical/UV by studying the simultaneous Swift-UVOT data, we find indications that the compactness of the corona allows only a small fraction of the total UV/optical flux to be Comptonized. Our analysis of the reprocessed emission show that 3C 390.3 only has a small amount of reflection (R ~ 0.3), and of that the vast majority is from distant neutral matter. Furthermore, we also discover a soft-X-ray excess in the source, which can be described by a weak ionized reflection component from the inner parts of the accretion disk. In addition to the backscattered emission, we also detect the highly ionized iron emission lines Fe xxv and Fe xxvi.},
doi = {10.1088/0004-637X/814/1/24},
journal = {The Astrophysical Journal (Online)},
number = 1,
volume = 814,
place = {United States},
year = {Fri Nov 13 00:00:00 EST 2015},
month = {Fri Nov 13 00:00:00 EST 2015}
}
Web of Science
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