Correlation properties of galaxies from the Main Galaxy Sample of the SDSS survey |
| |
| Authors: | A V Tikhonov |
| |
| Institution: | (1) St. Petersburg State University, Universitetskiĭ pr. 28, Petrodvorets, St. Petersburg, 198504, Russia |
| |
| Abstract: | The apparatus of correlation gamma function (Γ*(r)) is used to analyze volume-limited samples from the DR4 Main Galaxy Sample of the SDSS survey with the aim of determining the characteristic scales of galaxy clustering. Up to 20h ?1 Mpc (H 0 = 65 km s?1 Mpc?1), the distribution of galaxies is described by a power-law density—distance dependence, Γ*(r) ∝ r ?γ , with an index γ ≈ 1.0. A change in the state of clustering (a significant deviation from the power law) was found on a scale of (20–25) h ?1 Mpc. The distribution of SDSS galaxies becomes homogeneous (γ ～ 0) from a scale of ～60h ?1 Mpc. The dependence of γ on the luminosity of galaxies in volume-limited samples was obtained. The power-law index γ increases with decreasing absolute magnitude of sample galaxies M abs. At M abs ～ ?21.4, which corresponds to the characteristic value M r * of the SDSS luminosity function, this dependence exhibits a break followed by a more rapid increase in γ. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
