Is there a UV/X-ray connection in IRAS 13224-3809?

被引：24

作者：

Buisson, D. J. K. ^{[1
]}

Lohfink, A. M. ^{[1
,2
]}

Alston, W. N. ^{[1
]}

Cackett, E. M. ^{[3
]}

Chiang, C. -Y. ^{[3
]}

Dauser, T. ^{[4
,5
]}

De Marco, B. ^{[6
]}

Fabian, A. C. ^{[1
]}

Gallo, L. C. ^{[7
]}

Garcia, J. A. ^{[4
,5
,8
,9
]}

Jiang, J. ^{[1
]}

Kara, E. ^{[10
]}

Middleton, M. J. ^{[11
]}

Miniutti, G. ^{[12
]}

Parker, M. L. ^{[1
]}

Pinto, C. ^{[1
]}

Uttley, P. ^{[13
]}

Walton, D. J. ^{[1
]}

Wilkins, D. R. ^{[14
]}

机构：

[1] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[3] Wayne State Univ, Dept Phys & Astron, 666 W Hancock St, Detroit, MI 48201 USA

[4] Dr Karl Remeis Observ, Sternwartstr 7, D-96049 Bamberg, Germany

[5] Erlangen Ctr Astroparticle Phys, Sternwartstr 7, D-96049 Bamberg, Germany

[6] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Bartycka 18, PL-00716 Warsaw, Poland

[7] St Marys Univ, Dept Astron & Phys, 923 Robie St, Halifax, NS B3H 3C3, Canada

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

[9] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[10] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[11] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

[12] ESAC, Ctr Astrobiol CSIC INTA, Dept Astrofis, POB 78, E-28691 Madrid, Spain

[13] Univ Amsterdam, Anton Pannekoek Inst, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[14] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, 452 Lomita Mall, Stanford, CA 94305 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 475卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

accretion; accretion discs; black hole physics; galaxies: individual: IRAS13224-3809; galaxies: Seyfert; ACTIVE GALACTIC NUCLEI; ULTRAVIOLET SPECTRAL EVIDENCE; LINE SEYFERT-1 GALAXIES; DIGITAL SKY SURVEY; X-RAY; XMM-NEWTON; BLACK-HOLE; OPTICAL VARIABILITY; RAPID VARIABILITY; 1H; 0707-495;

D O I：

10.1093/mnras/sty008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results from the optical, ultraviolet, and X-ray monitoring of the NLS1 galaxy IRAS 13224-3809 taken with Swift and XMM-Newton during 2016. IRAS 13224-3809 is the most variable bright AGN in the X-ray sky and shows strong X-ray reflection, implying that the X-rays strongly illuminate the inner disc. Therefore, it is a good candidate to study the relationship between coronal X-ray and disc UV emission. However, we find no correlation between the X-ray and UV flux over the available similar to 40 d monitoring, despite the presence of strong X-ray variability and the variable part of the UV spectrum being consistent with irradiation of a standard thin disc. This means either that the X-ray flux which irradiates the UV emitting outer disc does not correlate with the X-ray flux in our line of sight and/or that another process drives the majority of the UV variability. The former case may be due to changes in coronal geometry, absorption or scattering between the corona and the disc.

引用

页码：2306 / 2313

页数：8

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