DISCOVERY OF AN INFRARED NUCLEUS IN CYGNUS-A - AN OBSCURED QUASAR REVEALED

被引：53

作者：

DJORGOVSKI, S

WEIR, N

MATTHEWS, K

GRAHAM, JR

机构：

[1] Robinson Laboratory, MS 105-24, California Institute of Technology, Pasadena

[2] Downs Laboratory, MS 320-47, California Institute of Technology, Pasadena

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 372卷 / 02期

关键词：

GALAXIES; INDIVIDUAL; (CYGNUS-A); INFRARED; SOURCES; QUASARS; RADIO SOURCES; GENERAL;

D O I：

10.1086/186025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the discovery of a compact, unresolved infrared nucleus, coincident with the radio core, in the prototypical powerful radio galaxy Cygnus A (3C 405). The infrared colors and magnitudes of the nucleus can be explained as a highly reddened extension of the radio continuum. The implied restframe extinction is A(v) congruent-to 50 +/- 30 magnitudes. The extinction-corrected luminosity of the object is in the quasar range. This discovery gives some support to the unification models for quasars and powerful radio galaxies.

引用

页码：L67 / L70

页数：4

共 35 条

[1] A MULTI-FREQUENCY RADIO STUDY OF CYGNUS-A [J].