THE COMPACT RADIO STRUCTURE OF RADIO-LOUD NARROW LINE SEYFERT 1 GALAXIES

被引：39
作者：
Gu, Minfeng [1 ,2 ]
Chen, Yongjun [1 ]
机构：
[1] Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China
[2] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA
来源：
ASTRONOMICAL JOURNAL | 2010年 / 139卷 / 06期
基金：
美国国家科学基金会;
关键词：
galaxies: active; galaxies: jets; galaxies: Seyfert; radio continuum: galaxies; ACTIVE GALACTIC NUCLEI; X-RAY-PROPERTIES; SPECTRAL ENERGY-DISTRIBUTIONS; HIGH-FREQUENCY PEAKERS; DIGITAL SKY SURVEY; BLACK-HOLE MASS; BRIGHTNESS TEMPERATURE; EDDINGTON RATIO; STEEP-SPECTRUM; PMN J0948+0022;
D O I：
10.1088/0004-6256/139/6/2612
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the compact radio structure of three radio-loud narrow line Seyfert 1 galaxies from the Very Long Baseline Array archive data at 2.3, 5, and 8.4 GHz. In RXS J16290+4007, the radio structure is mostly unresolved. The combination of compact radio structure, high brightness temperature, and inverted spectrum between simultaneous 2.3 and 8.4 GHz strongly favors jet relativistic beaming. Combined with the very long baseline interferometry data at 1.6 and 8.4 GHz from the literature, we argue that RXS J16333+4718 also may harbor a relativistic jet, with resolved core-jet structure in 5 GHz. B3 1702+457 is clearly resolved with a well-defined jet component. The overall radio steep spectrum indicates that B3 1702+457 is likely a source optically defined as NLS1 with radio definition of compact steep spectrum sources. From these three sources, we found that radio loud NLS1s can be either intrinsically radio loud (e. g., B3 1702+457) or apparently radio loud due to jet beaming effects (e. g., RXS J16290+4007 and RXS J16333+4718).
引用
收藏
页码：2612 / 2619
页数：8
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