The soft X-ray properties of a complete sample of radio sources

被引:46
作者
Siebert, J
Brinkmann, W
Morganti, R
Tadhunter, CN
Danziger, IJ
Fosbury, RAE
Alighieri, SD
机构
[1] CNR,IST RADIOASTRON,I-40129 BOLOGNA,ITALY
[2] CSIRO,AUSTRALIA TELESCOPE NATL FACIL,EPPING,NSW 2121,AUSTRALIA
[3] UNIV SHEFFIELD,DEPT PHYS,SHEFFIELD S3,S YORKSHIRE,ENGLAND
[4] ESO,D-85748 GARCHING,GERMANY
[5] SPACE TELESCOPE EUROPEAN COORDINATING FACIL,D-85748 GARCHING,GERMANY
[6] EUROPEAN SPACE AGCY,DEPT SPACE SCI,DIV ASTROPHYS,PARIS,FRANCE
[7] OSSERV ASTROFIS ARCETRI,I-50125 FLORENCE,ITALY
关键词
galaxies; active; X-rays;
D O I
10.1093/mnras/279.4.1331
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the soft X-ray (0.1-2.4 keV) properties of a complete sample of 88 southern radio sources derived from the Wall & Peacock 2-Jy sample, It comprises 68 radio galaxies, 18 quasars and 2 BL Lac objects, Whereas both BL Lac objects and all but one quasar are detected in the ROSAT All-Sky Survey, the fraction of detected radio galaxies is only similar to 60 per cent, For the undetected sources upper limits to the X-ray flux are given, We confirm the correlation of the soft X-ray luminosity (L(x)) with the core radio luminosity (L(r,core)) for galaxies as well as for quasars using partial correlation analysis, whereas the corresponding correlations between L(x) and L(r,total) are probably spurious due to sample selection effects, We also find strong correlations between L(x) and L(r,core) for both Fanaroff-Riley type I (FR I) and type II galaxies, The broad-line radio galaxies (BLRGs) and the quasars are at the top end of the X-ray luminosity distribution and the detection rate of these objects generally is higher than that of the narrow- or weak-lined radio galaxies, This indicates the presence of an anisotropic X-ray component in BLRGs and quasars, as predicted by unified schemes for radio sources.
引用
收藏
页码:1331 / 1344
页数:14
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