INFRARED-SPECTROSCOPY OF HIGH-REDSHIFT QUASARS

被引:21
作者
BAKER, AC
CARSWELL, RF
BAILEY, JA
ESPEY, BR
SMITH, MG
WARD, MJ
机构
[1] ANGLO AUSTRALIAN OBSERV,EPPING,NSW 2121,AUSTRALIA
[2] UNIV PITTSBURGH,DEPT PHYS & ASTRON,PITTSBURGH,PA 15260
[3] JOINT ASTRON CTR,HILO,HI 96720
[4] UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND
关键词
QUASARS; EMISSION LINES; GENERAL; INFRARED; GALAXIES;
D O I
10.1093/mnras/270.3.575
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present H and K spectra (showing redshifted H alpha, H beta and [O III] emission lines) of three radio-loud and three radio-quiet quasars with redshifts z greater than or similar to 2, which were obtained using CGS4 on UKIRT. The [O III] lambda lambda 4959 + 5007 lines are too weak to allow accurate determination of the redshift of the forbidden lines. The observed Balmer decrements are consistent with enhancement of H alpha due to collisional excitation.
引用
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页码:575 / 579
页数:5
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