THE BROAD-BAND X-RAY SPECTRUM OF IC 4329A FROM A JOINT NuSTAR/SUZAKU OBSERVATION

被引：67

作者：

Brenneman, L. W. ^{[1
]}

Madejski, G. ^{[2
]}

Fuerst, F. ^{[3
]}

Matt, G. ^{[4
]}

Elvis, M. ^{[1
]}

Harrison, F. A. ^{[3
]}

Ballantyne, D. R. ^{[5
]}

Boggs, S. E. ^{[6
]}

Christensen, F. E. ^{[7
]}

Craig, W. W. ^{[7
,8
]}

Fabian, A. C. ^{[9
]}

Grefenstette, B. W. ^{[3
]}

Hailey, C. J. ^{[10
]}

Madsen, K. K. ^{[3
]}

Marinucci, A. ^{[4
]}

Rivers, E. ^{[3
]}

Stern, D. ^{[11
]}

Walton, D. J. ^{[3
]}

Zhang, W. W. ^{[12
]}

机构：

[1] Harvard Smithsonian CfA, Cambridge, MA 02138 USA

[2] SLAC Natl Accelerator Lab, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA

[3] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA

[4] Univ Roma Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy

[5] Georgia Inst Technol, Ctr Relativist Astrophys, Sch Phys, Atlanta, GA 30332 USA

[6] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[7] Tech Univ Denmark, DTU Space Natl Space Inst, DK-2800 Lyngby, Denmark

[8] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[9] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[10] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[11] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[12] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 788卷 / 01期

基金：

美国国家航空航天局;

关键词：

accretion; accretion disks; galaxies : active; galaxies : individual (IC 4329A); galaxies : nuclei; galaxies : Seyfert; X-rays : galaxies; ACTIVE GALACTIC NUCLEI; SEYFERT-GALAXY IC-4329A; K-ALPHA LINES; BLACK-HOLE; XMM-NEWTON; BEPPOSAX OBSERVATIONS; COMPTON REFLECTION; EDDINGTON RATIO; TIMING-EXPLORER; ACCRETION DISK;

D O I：

10.1088/0004-637X/788/1/61

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have obtained a deep, simultaneous observation of the bright, nearby Seyfert galaxy IC 4329A with Suzaku and NuSTAR. Through a detailed spectral analysis, we are able to robustly separate the continuum, absorption, and distant reflection components in the spectrum. The absorbing column is found to be modest (similar to 6 x 10(21) cm(-2)), and does not introduce any significant curvature in the Fe K band. We are able to place a strong constraint on the presence of a broadened Fe K alpha line (E-rest = 6.46(-0.07)(+0.08) keV with sigma = 0.33(-0.07)(+0.08) keV and EW = 34(-7)(+8) eV), though we are not able to constrain any of the parameters of a relativistic reflection model. These results highlight the range in broad Fe K line strengths observed in nearby, bright, active galactic nuclei (roughly an order of magnitude), and imply a corresponding range in the physical properties of the inner accretion disk in these sources. We have also updated our previously reported measurement of the high-energy cutoff of the hard X-ray emission using both observatories rather than just NuSTAR alone: E-cut = 186 +/- 14 keV. This high-energy cutoff acts as a proxy for the temperature of the coronal electron plasma, enabling us to further separate this parameter from the plasma's optical depth and to update our results for these parameters as well. We derive kT = 50(-3)(+6) keV with tau = 2.34(-0.11)(+0.16) using a spherical geometry, kT = 61 +/- 1 keV with tau = 0.68 +/- 0.02 for a slab geometry, with both having an equivalent goodness-of-fit.

引用

页数：15

共 65 条

[1] UNIFIED MODELS FOR ACTIVE GALACTIC NUCLEI AND QUASARS
ANTONUCCI, R
[J]. ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1993, 31 : 473 - 521
[2] Arnaud KA, 1996, ASTR SOC P, V101, P17
[3] A CORRELATION BETWEEN THE IONIZATION STATE OF THE INNER ACCRETION DISK AND THE EDDINGTON RATIO OF ACTIVE GALACTIC NUCLEI
Ballantyne, D. R.
McDuffie, J. R.
Rusin, J. S.
[J]. ASTROPHYSICAL JOURNAL, 2011, 734 (02)
[4] THE DISTRIBUTION AND COSMIC DENSITY OF RELATIVISTIC IRON LINES IN ACTIVE GALACTIC NUCLEI
Ballantyne, D. R.
[J]. ASTROPHYSICAL JOURNAL LETTERS, 2010, 708 (01) : L1 - L4
[5] The first INTEGRAL AGN catalog
Beckmann, V
Gehrels, N
Shrader, CR
Soldi, S
[J]. ASTROPHYSICAL JOURNAL, 2006, 638 (02) : 642 - 652
[6] Plasma ejection from magnetic flares and the X-ray spectrum of Cygnus X-1
Beloborodov, AM
[J]. ASTROPHYSICAL JOURNAL, 1999, 510 (02) : L123 - L126
[7] THE COSMIC X-RAY-BACKGROUND
BOLDT, E
[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1987, 146 (04): : 215 - 257
[8] Brenneman L., 2013, Measuring the Angular Momentum of Supermassive Black Holes
[9] MEASURING THE CORONAL PROPERTIES OF IC 4329A WITH NuSTAR
Brenneman, L. W.
Madejski, G.
Fuerst, F.
Matt, G.
Elvis, M.
Harrison, F. A.
Ballantyne, D. R.
Boggs, S. E.
Christensen, F. E.
Craig, W. W.
Fabian, A. C.
Grefenstette, B. W.
Hailey, C. J.
Madsen, K. K.
Marinucci, A.
Rivers, E.
Stern, D.
Walton, D. J.
Zhang, W. W.
[J]. ASTROPHYSICAL JOURNAL, 2014, 781 (02)
[10] NGC 5548: LACK OF A BROAD Fe Kα LINE AND CONSTRAINTS ON THE LOCATION OF THE HARD X-RAY SOURCE
Brenneman, L. W.
Elvis, M.
Krongold, Y.
Liu, Y.
Mathur, S.
[J]. ASTROPHYSICAL JOURNAL, 2012, 744 (01)

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