中文

2MASS 红移测量的偶极子各向异性

天体物理学 2007-05-23 v1

摘要

我们从近红外 Two Micron All Sky Redshift Survey(2MRS)中估计 Local Group(LG)的光加权加速度。由于近红外光加权偶极子非常稳健,因为它们几乎等效于质量加权偶极子,绕过了红移畸变的影响,且无需指定首选参考系。我们使用该方法结合红移信息来确定偶极子随距离的变化。LG 偶极子似乎在 60 Mpc/h 处收敛。假设收敛,2MRS 光偶极子与 CMB 偶极子的比较提供了质量密度和光度偏置参数的组合值 Omega_m^0.6/b_L= 0.40+/-0.09。

关键词

引用

@article{arxiv.astro-ph/0605343,
  title  = {The Dipole Anisotropy of the 2mass Redshift Survey},
  author = {P. Erdogdu and J. P. Huchra and O. Lahav and M. Colless and R. M. Cutri and E. Falco and T. George and T. Jarrett and D. H. Jones and C. S. Kochanek and L. Macri and J. Mader and N. Martimbeau and M. Pahre and Q. Parker and A. Rassat and W. Saunders},
  journal= {arXiv preprint arXiv:astro-ph/0605343},
  year   = {2007}
}

备注

4 pages, 2 figures, Contribution to Rencontres de Moriond: Contents and Structures of the Universe, March 18-25, 2006, La Thuile