The m-z relation for Type Ia supernovae, locally inhomogeneous cosmological models, and the nature of dark matter

被引：8
|
作者：
Helbig, Phillip
机构：
[1] Thomas-Mann-Str. 9, Maintal
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 451卷 / 02期
关键词：
supernovae: general; cosmological parameters; cosmology: theory; dark energy; dark matter; DISTANCE-REDSHIFT RELATIONS; ACCELERATING UNIVERSE; CONSTRAINTS; LIGHT; PROPAGATION; LAMBDA; OMEGA;
D O I：
10.1093/mnras/stv1074
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The m-z relation for Type Ia supernovae is one of the key pieces of evidence supporting the cosmological 'concordance model' with lambda(0) approximate to 0.7 and Omega(0) approximate to 0.3. However, it is well known that the m-z relation depends not only on lambda(0) and Omega(0) (with H-0 as a scale factor) but also on the density of matter along the line of sight, which is not necessarily the same as the large-scale density. I investigate to what extent the measurement of lambda(0) and Omega(0) depends on this density when it is characterized by the parameter eta (0 <= eta <= 1), which describes the ratio of density along the line of sight to the overall density. I also discuss what constraints can be placed on eta, both with and without constraints on lambda(0) and Omega(0) in addition to those from the m-z relation for Type Ia supernovae.
引用
收藏
页码：2097 / 2107
页数：11
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