A comparison of local Type Ia supernovae with the IRAS PSCz gravity field

被引：42

作者：

Radburn-Smith, DJ

Lucey, JR

Hudson, MJ

机构：

[1] Univ Durham, Dept Phys, Durham DH1 3LE, England

[2] Univ Waterloo, Dept Phys, Waterloo, ON N2L 3G1, Canada

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 355卷 / 04期

关键词：

galaxies : distances and redshifts; cosmological parameters; cosmology : observations; dark matter; large-scale structure of Universe;

D O I：

10.1111/j.1365-2966.2004.08420.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compare the measured peculiar velocities of 98 local (<150 h(-1) Mpc) Type Ia supernovae with predictions derived from the IRAS PSCz survey. There is excellent agreement between the two data sets, with a best- fitting beta(I)(= Omega m0.6/b(I)) of 0.55 +/- 0.06. Subsets of the supernovae data set are further analysed, and the above result is found to be robust with respect to culls by distance, host-galaxy extinction and choice of reference frame in which the analysis is carried out. Alternative methods of determining beta(I) including density-density comparisons, dipole measurements and WMAP-based results are also discussed. We conclude that most recent determinations are consistent with a value of beta(I) = 0.5.

引用

页码：1378 / 1382

页数：5

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