Investigating the Candidate Displaced Active Galactic Nucleus in NGC 3115

被引：3

作者：

Jones, Megan L. ^{[1
,2
]}

Burke-Spolaor, Sarah ^{[1
,2
]}

Nyland, Kristina ^{[3
]}

Wrobel, Joan M. ^{[4
]}

机构：

[1] West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA

[2] West Virginia Univ, Ctr Gravitat Waves & Cosmol, Chestnut Ridge Res Bldg, Morgantown, WV 26505 USA

[3] Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA

[4] Natl Radio Astron Observ, POB O, Socorro, NM 87801 USA

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 874卷 / 02期

基金：

美国国家科学基金会;

关键词：

galaxies: active; galaxies: individual (NGC 3115); galaxies: nuclei; radio continuum: galaxies; SUPERMASSIVE BLACK-HOLE;

D O I：

10.3847/1538-4357/ab0a09

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The nearby galaxy NGC 3115 contains a known radio-emitting, low-luminosity active galactic nucleus (AGN), and was recently claimed to host a candidate AGN displaced 14.3 pc from the galaxy's optical photocenter. Our goal is to understand whether this represents a single offset AGN, an AGN in orbit around a central black hole, or something else. We present a new, sensitive (rms = 4.4 mu Jy beam(-1)) 10 GHz image, which finds evidence for only one AGN. We place a stringent limit on the radio luminosity of any secondary supermassive black hole of L-10 (GHz) < 5.8 x 10(33 )erg s(-1). An analysis of the relative positioning of the radio core, X-ray nucleus, and stellar bulge in this galaxy indicate that the radio source is centrally located, and not offset from the galactic bulge. This provides an argument against a single offset AGN in NGC 3115; however, it does not provide conclusive evidence against the purported offset AGN as an inspiralling secondary black hole.

引用

页数：5

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