QUASAR COLORS - STATISTICS AND COSMOLOGICAL EVOLUTION

被引:18
作者
GIALLONGO, E [1 ]
TREVESE, D [1 ]
机构
[1] UNIV ROME LA SAPIENZA,IST ASTRON,I-00161 ROME,ITALY
关键词
Cosmology; Quasars; Spectrophotometry;
D O I
10.1086/168585
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have constructed a model spectrum to study QSO broad-band colors as a function of redshift. Using the available statistical data, we have generated realistic color distributions that give quantitative estimates of the incompleteness associated with the various color selection techniques as a function of redshift. We have also developed a simple model for the average Lyman continuum absorption based on the statistics of the Lyα clouds to explore the resulting colors of high-redshift QSOs. Selection biases on the estimate of QSO density at high redshift are also discussed.
引用
收藏
页码:24 / 33
页数:10
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