期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 425, 期 2, 页码 1527-1548出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2012.21434.x
关键词
techniques: photometric; surveys; galaxies: distances and redshifts; galaxies: statistics; large-scale structure of Universe
资金
- Greek State Scholarship Foundation
- Swiss Sunburst Fund
- Science and Technology Facilities Council [ST/F002858/1, ST/I000976/1]
- Australian Research Council QEII Fellowship
- J G Russell Award from the Australian Academy of Science
- Royal Society URF
- ERC StG grant [DEGAS-259586]
- STFC (UK)
- ARC (Australia)
- AAO
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- STFC [ST/K003577/1, ST/J001465/1, ST/H002391/1, ST/J002291/1, PP/E001149/1, ST/G001987/1, ST/I001166/1, ST/I00162X/1, ST/H008519/1, ST/F002858/1, ST/I001212/1, ST/F002289/1, ST/I001204/1, ST/G001979/1, ST/I003088/1, ST/H007156/1, ST/J001546/1, ST/F006977/1, ST/H00131X/1, ST/I000976/1, ST/H008578/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J002291/1, ST/H008578/1, ST/I001204/1, ST/I001166/1, ST/G001979/1, ST/H007156/1, ST/H002391/1, ST/J001465/1, ST/H008519/1, ST/G001987/1, ST/I000976/1, ST/I003088/1, ST/I00162X/1, ST/F002289/1, ST/H00131X/1, ST/J001546/1, ST/K003577/1, ST/F002858/1, ST/F006977/1, PP/E001149/1, ST/I001212/1] Funding Source: researchfish
We measure the two-point angular correlation function of a sample of 4289 223 galaxies with r < 19.4 mag from the Sloan Digital Sky Survey (SDSS) as a function of photometric redshift, absolute magnitude and colour down to Mr - 5 log h = -14 mag. Photometric redshifts are estimated from ugriz model magnitudes and two Petrosian radii using the artificial neural network package annz, taking advantage of the Galaxy And Mass Assembly (GAMA) spectroscopic sample as our training set. These photometric redshifts are then used to determine absolute magnitudes and colours. For all our samples, we estimate the underlying redshift and absolute magnitude distributions using Monte Carlo resampling. These redshift distributions are used in Limber's equation to obtain spatial correlation function parameters from power-law fits to the angular correlation function. We confirm an increase in clustering strength for sub-L* red galaxies compared with similar to L* red galaxies at small scales in all redshift bins, whereas for the blue population the correlation length is almost independent of luminosity for similar to L* galaxies and fainter. A linear relation between relative bias and log luminosity is found to hold down to luminosities L similar to 0.03L*. We find that the redshift dependence of the bias of the L* population can be described by the passive evolution model of Tegmark & Peebles. A visual inspection of a random sample from our r < 19.4 sample of SDSS galaxies reveals that about 10 per cent are spurious, with a higher contamination rate towards very faint absolute magnitudes due to over-deblended nearby galaxies. We correct for this contamination in our clustering analysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据