HIGH REDSHIFT RADIO GALAXIES FROM THE MOLONGLO CATALOG .2.

被引:58
作者
MCCARTHY, PJ
VANBREUGEL, W
KAPAHI, VK
SUBRAHMANYA, CR
机构
[1] UNIV CALIF LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550
[2] UNIV POONA,TATA INST FUNDAMENTAL RES,NATL CTR RADIO ASTRON,POONA 411007,MAHARASHTRA,INDIA
关键词
D O I
10.1086/115891
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report further results from our ongoing study of radio galaxies from the Molonglo Reference Catalogue. The sources were selected to have 408 MHz flux densities greater than 0.95 Jy and low frequency spectral indices steeper than -0.9. VLA 6 cm maps, optical identifications and redshifts for 18 sources are presented. Most of these sources are identified with faint galaxies, many of which have extended optical structures with morphologies characteristic of high redshift (z > 1) radio galaxies. Long slit spectroscopic observations have yielded redshifts for all of the galaxies, three of which have z > 2. Spectrophotometry of 1 Jy and the 3CR samples are used to distinguish between an L (emission line) versus L (radio) correlation as opposed to an L (emission line) versus redshift correlation. Our results strongly support an intrinsic L (emission line) versus L (radio) correlation. The structure of the sources in this, and other 1 Jy samples, are substantially different from the 3C sources, the 1 Jy galaxies having stronger cores and jets.
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页码:522 / 536
页数:15
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