Cosmology at low redshifts

被引：5

作者：

Borra, EF ^{[1
]}

机构：

[1] Univ Laval, Dept Phys Genie Phys & Opt, St Foy, PQ G1K 7P4, Canada

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 404卷 / 01期

关键词：

telescopes; instrumentation : miscellaneous; cosmology : observations;

D O I：

10.1051/0004-6361:20030487

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is argued that it is far more cost effective to carry out some projects with medium-sized dedicated zenith telescopes rather than large steerable telescopes, freeing the later to carry out projects that truly need them. I show that the large number of objects observed with a surveying 4-m zenith telescope allows one to carry out cosmological projects at low redshifts. Examining two case studies, I show first that a variability survey would obtain light curves for several thousands of type Ia supernovae per year up to z = 1 and easily discriminate among competing cosmological models. Finally, I discuss a second case study, consisting of a spectrophotometric survey carried out with interference filters, showing its power to discriminate among cosmological models and to study the large-scale distribution of galaxies in the Universe.

引用

页码：47 / 55

页数：9

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