A MULTI-RADIO-FREQUENCY STUDY OF THE RADIO-QUIET QUASAR E1821+643

被引：22

作者：

BLUNDELL, KM

LACY, M

机构：

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1995年 / 274卷 / 01期

关键词：

GALAXIES; ACTIVE; JETS; QUASARS; INDIVIDUAL; E1821; 643; RADIO CONTINUUM;

D O I：

10.1093/mnras/274.1.L9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first multi-radio-frequency study of a radio-quiet quasar, E1821+643. Our maps show two possible jet candidates on diametrically opposite sides of the core. A spectral index study is presented, which reveals some extended, very steep-spectrum material, which may be associated either with products of a diverted jet or with a starburst. We present evidence that the steep spectrum of the extended radio emission is caused by rapid ageing of the synchrotron electrons in the radiation field of the quasar. Finally, we discuss our data in the context of AGN unification schemes.

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页码：L9 / L13

页数：5

相关论文

共 20 条

[1] UNIFIED MODELS FOR ACTIVE GALACTIC NUCLEI AND QUASARS [J].

ANTONUCCI, R .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1993, 31 :473-521

[2] 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

[3] X-RAY SPECTRAL EVOLUTION OF HIGH-REDSHIFT QUASARS [J].

BECHTOLD, J ;

ELVIS, M ;

FIORE, F ;

KUHN, O ;

CUTRI, RM ;

MCDOWELL, JC ;

RIEKE, M ;

SIEMIGINOWSKA, A ;

WILKES, BJ .

ASTRONOMICAL JOURNAL, 1994, 108 (03) :759-765

[4]

BLANDFORD RD, 1990, COURVOISIER, P161

[5] DEEP VLA IMAGING OF 12 EXTENDED 3CR QUASARS [J].

BRIDLE, AH ;

HOUGH, DH ;

LONSDALE, CJ ;

BURNS, JO ;

LAING, RA .

ASTRONOMICAL JOURNAL, 1994, 108 (03) :766-820

[6] EXTRAGALACTIC RADIO JETS [J].

BRIDLE, AH ;

PERLEY, RA .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1984, 22 :319-358

[7] MULTIFREQUENCY RADIO OBSERVATIONS OF CYGNUS-A - SPECTRAL AGING IN POWERFUL RADIO GALAXIES [J].

CARILLI, CL ;

PERLEY, RA ;

DREHER, JW ;

LEAHY, JP .

ASTROPHYSICAL JOURNAL, 1991, 383 (02) :554-573

[8] MORPHOLOGICAL PECULIARITIES OF HIGH-REDSHIFT RADIO GALAXIES - THE ROLE OF RELATIVISTIC ELECTRONS [J].

DALY, RA .

ASTROPHYSICAL JOURNAL, 1992, 399 (02) :426-443

[9] A NUCLEAR STARBURST RING IN THE SPIRAL GALAXY NGC-7552 [J].

FORBES, DA ;

NORRIS, RP ;

WILLIGER, GM ;

SMITH, RC .

ASTRONOMICAL JOURNAL, 1994, 107 (03) :984-&

[10] A HIGH SIGNAL-TO-NOISE RATIO COMPOSITE QUASAR SPECTRUM [J].

FRANCIS, PJ ;

HEWETT, PC ;

FOLTZ, CB ;

CHAFFEE, FH ;

WEYMANN, RJ ;

MORRIS, SL .

ASTROPHYSICAL JOURNAL, 1991, 373 (02) :465-470