R-BAND IMAGING OF FIELDS AROUND 1-LESS-THAN-Z-LESS-THAN-2 RADIOGALAXIES

被引：14

作者：

BENITEZ, N

MARTINEZGONZALEZ, E

GONZALEZSERRANO, JI

CAYON, L

机构：

[1] UNIV CANTABRIA,FAC CIENCIAS,CSIC,INST MIXTO FIS,E-39005 SANTANDER,SPAIN

[2] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

来源：

ASTRONOMICAL JOURNAL | 1995年 / 109卷 / 03期

关键词：

D O I：

10.1086/117332

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have taken deep R-band images of fields around five radiogalaxies: 0956+47, 1217+36, 3C 256, 3C 324, and 3C 294, with 1<z<2. 0956+47 is found to show a double nucleus. Our data on 1217+36 suggest the revision of its classification as a radiogalaxy. We found a statistically significant excess of bright (19.5<R<22) galaxies on scales of 2 arcmin around the radiogalaxies (which have R ≈ 21.4) in our sample. The excess has been determined empirically to be at the ≳99.5% level. It is remarkable that this excess is not present for 22<R<23.75 galaxies within the same area, suggesting that the excess is not physically associated to the galaxies but due to intervening groups and then related to gravitational lensing.

引用

页码：935 / 941

页数：7

共 29 条

[1] A COMPLETE SAMPLE OF EXTRA-GALACTIC RADIO-SOURCES AT 1-JY AT 408-MHZ .2. THE OPTICAL OBSERVATIONS [J].