WFPC2 银河系星系的盘与盘形成的形态学：HST 中等深度调查数据库
摘要
对 WFPC2 调查场域中检测到的星系量化形态和结构参数进行估计。基于最大似然法 developed for two-dimensional decomposition of faint under-sampled galaxy images into components of disk and bulge morphology. Decomposition can be achieved for images down to F814W (I) ~23.0, F606W (V) ~23.8 and F450W (B) ~23.3 magnitudes in WFPC2 exposures of one hour. We discuss details of the fitting procedure, and present the observed distributions of magnitude, color, effective half-light radius, disk and bulge axis ratios, bulge/(disk+bulge) flux ratio, bulge/disk half-light radius ratio and surface brightness. We also discuss the various selection limits on the measured parameters. The Medium Deep Survey catalogs and images of random pure parallel fields and other similar archival primary WFPC2 fields have been made available via the Internet with a searchable browser interface to the database at http://archive.stsci.edu/mds/
引用
@article{arxiv.astro-ph/9904179,
title = {Disk and Bulge Morphology of WFPC2 galaxies: The HST Medium Deep Survey database},
author = {Kavan U. Ratnatunga and Richard E. Griffiths and Eric J. Ostrander},
journal= {arXiv preprint arXiv:astro-ph/9904179},
year = {2007}
}
备注
61 pages including 28 figures and 1 table. 500KB .ps.gz 2.7MB gunzip Accepted for AJ July 1999. MDS database Primary reference document