Photometric and morphological analysis of UCM galaxies. II. Statistical results and interpretation
Photometric and morphological analysis of UCM galaxies. II. Statistical results and interpretation
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UCM 星系的光度和形态分析。
DOI：
10.1051/aas:1996301
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
O. Alonso
中科院分区：
文献类型：
--
作者：
A. Vitores;J. Zamorano;M. Rego;J. Gallego;O. Alonso
本文给出了低分辨率物镜光谱中H_α发射所选择的马德里大学发射线星系样品的Tuan&Gunn r-Cccd成像观测结果。在这项工作中，来自UCM调查的总共212个物体被进行了光度和形态特征的表征。在前一篇文章中，介绍了UCM对象的观测、基本约化和形态分类。在这里，我们分析了样本的统计性质及其解释。得到的主要结果如下：(1)对于比正常螺旋线更小、亮度更低的ELG，我们的测量是特别有效的(UCM样本的中位值分别为M_r=-20.6和D_24=19.4kpc，H_0=50 kM S^-1 mpc^-1)。(2)该样本呈现了一个非常不同形态的星系群体。晚型星系明显占优势，其中66%是Sb或更晚的星系。(3)我们发现了一组特别有趣的星系。特别是，我们提出了9个蓝致密矮星星系(BCD)的候选星系，其中5个是以前未知的。(4)样本中约有10%的ELG具有典型的S0型参数，在16个UCM相互作用星系中，25%为S0型。(5)在彗星团内部的一组UCM星系中，71%的星系呈现出SB或更晚的哈勃类型。
We present the results of Thuan & Gunn r CCD imaging observations of the Universidad Complutense de Madrid (UCM) sample of emission-line galaxies (ELGs) selected by the presence of H_α emission in low resolution objective-prism spectra. In this work, a total of 212 objects from the UCM survey have been photometrically and morphologically characterized. In a previous paper, the observations, basic reductions and morphological classification for the UCM objects were presented. Here, we analyse the statistical properties of the sample and their interpretations. The main results obtained are as follows: (1) Our survey is specially effective in the detection of ELGs smaller and less luminous than normal spirals (the median values of the UCM sample are M_r = -20.6 and D_24 = 19.4 kpc, for H_0 = 50 km s^-1 Mpc^-1). (2) The sample presents a very heterogeneous morphological population of galaxies. There is a clear predominance of late-type galaxies, with 66% being Sb or later. (3) We have found a set of galaxies specially interesting. In particular, we propose 9 candidates to BCD (blue compact dwarf galaxy), five of them previously unknown. (4) About 10% of the ELGs of the sample show typical parameters of S0 types, and in the subsample of 16 UCM interacting galaxies, 25% are S0 type galaxies. (5) In the set of UCM galaxies inside the Coma cluster, 71% exhibit Hubble types Sb or later.