Anomalous radio-loudness of Cygnus A and other powerful radio galaxies

被引:91
作者
Barthel, PD
Arnaud, KA
机构
[1] NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,GREENBELT,MD 20771
[2] UNIV MARYLAND,DEPT ASTRON,COLLEGE PK,MD 20742
关键词
galaxies; active; intergalactic medium; infrared; radio continuum;
D O I
10.1093/mnras/283.2.L45
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The nearby, extremely powerful radio galaxy Cygnus A stands out as having an atypically low far-infrared/radio luminosity ratio. It is demonstrated that in objects displaying such a low ratio the radio-loudness is anomalously high, which fact is connected to these objects inhabiting dense X-ray haloes. The enhanced radio emission is most likely due to strong radiation losses in the dense environment, It must be concluded that radio luminosity is not a good measure of AGN power.
引用
收藏
页码:L45 / L49
页数:5
相关论文
共 46 条
[1]   THE INTRACLUSTER GAS AROUND CYGNUS-A [J].
ARNAUD, KA ;
FABIAN, AC ;
EALES, SA ;
JONES, C ;
FORMAN, W .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1984, 211 (04) :981-989
[2]   IDENTIFICATION OF THE RADIO SOURCES IN CASSIOPEIA, CYGNUS-A, AND PUPPIS-A [J].
BAADE, W ;
MINKOWSKI, R .
ASTROPHYSICAL JOURNAL, 1954, 119 (01) :206-&
[3]  
BAARS JWM, 1977, ASTRON ASTROPHYS, V61, P99
[4]   EXTRAGALACTIC RADIO-SOURCES WITH STEEP LOW-FREQUENCY SPECTRA [J].
BALDWIN, JE ;
SCOTT, PF .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1973, 165 (03) :259-269
[5]   EXTENDED OPTICAL-LINE EMITTING GAS IN POWERFUL RADIO GALAXIES - STATISTICAL PROPERTIES AND PHYSICAL CONDITIONS [J].
BAUM, SA ;
HECKMAN, T .
ASTROPHYSICAL JOURNAL, 1989, 336 (02) :681-701
[6]   EXTENDED OPTICAL-LINE-EMITTING GAS IN RADIO GALAXIES - BROAD-BAND OPTICAL NARROW-BAND OPTICAL, AND RADIO IMAGING OF A REPRESENTATIVE SAMPLE [J].
BAUM, SA ;
HECKMAN, T ;
BRIDLE, A ;
VANBREUGEL, W ;
MILEY, G .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1988, 68 (04) :643-714
[7]   MULTIFREQUENCY VLA OBSERVATIONS OF PKS 0745-191 - THE ARCHETYPAL COOLING FLOW RADIO-SOURCE [J].
BAUM, SA ;
ODEA, CP .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1991, 250 (04) :737-749
[8]  
Burns JO, 1996, ASTR SOC P, V100, P341
[9]   Cygnus A [J].
Carilli, CL ;
Barthel, PD .
ASTRONOMY AND ASTROPHYSICS REVIEW, 1996, 7 (01) :1-54
[10]   ROSAT OBSERVATIONS OF 3CR RADIO GALAXIES [J].
CRAWFORD, CS ;
FABIAN, AC .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1995, 273 (03) :827-836