DISCOVERY OF FOUR kpc-SCALE BINARY ACTIVE GALACTIC NUCLEI

被引：128

作者：

Liu, Xin ^{[1
]}

Greene, Jenny E. ^{[1
]}

Shen, Yue ^{[2
]}

Strauss, Michael A. ^{[1
]}

机构：

[1] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 715卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

black hole physics; galaxies: active; galaxies: interactions; galaxies: nuclei; galaxies: Seyfert; quasars: general; SUPERMASSIVE BLACK-HOLES; DIGITAL-SKY-SURVEY; REDSHIFT SURVEY; ELLIPTIC GALAXIES; QUASARS; LINES; CLASSIFICATION; FRAMEWORK; MERGERS; SYSTEM;

D O I：

10.1088/2041-8205/715/1/L30

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of four kpc-scale binary active galactic nuclei (AGNs). These objects were originally selected from the Sloan Digital Sky Survey based on double-peaked [O III] lambda lambda 4959, 5007 emission lines in their fiber spectra. The double peaks could result from pairing active supermassive black holes (SMBHs) in a galaxy merger or could be due to bulk motions of narrow-line region gas around a single SMBH. Deep near-infrared (NIR) images and optical slit spectra obtained from the Magellan 6.5 m and the Apache Point Observatory 3.5 m telescopes strongly support the binary SMBH scenario for the four objects. In each system, the NIR images reveal tidal features and double stellar components with a projected separation of several kpc, while optical slit spectra show two Seyfert 2 nuclei spatially coincident with the stellar components, with line-of-sight velocity offsets of a few hundred km s(-1). These objects were drawn from a sample of only 43 objects, demonstrating the efficiency of this technique to find kpc-scale binary AGNs.

引用

页码：L30 / L34

页数：5

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