EXTREMELY ISOLATED EARLY-TYPE GALAXIES IN THE SLOAN DIGITAL SKY SURVEY. I. THE SAMPLE

被引：12
作者：
Fuse, C. [1 ,2 ]
Marcum, P. [2 ]
Fanelli, M. [2 ,3 ]
机构：
[1] Rollins Coll, Dept Phys, Winter Pk, FL 32789 USA
[2] Texas Christian Univ, Dept Phys & Astron, Ft Worth, TX 76129 USA
[3] NASA, Ames Res Ctr, BAER Inst, Mountain View, CA 94035 USA
来源：
ASTRONOMICAL JOURNAL | 2012年 / 144卷 / 02期
基金：
美国国家科学基金会; 美国国家航空航天局;
关键词：
galaxies: elliptical and lenticular; cD; galaxies: photometry; SURVEY PHOTOMETRIC SYSTEM; ELLIPTIC GALAXIES; AMIGA SAMPLE; X-RAY; CATALOG; FIELD; ENVIRONMENTS; DENSITY;
D O I：
10.1088/0004-6256/144/2/57
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We describe the properties of a sample of extremely isolated early-type galaxies (IEGs) selected from the spectroscopic Sloan Digital Sky Survey. Sample galaxies are isolated from nearest neighbors more luminous than M-V = -16.5 by a minimum distance corresponding to 2.5 Mpc and 350 km s (1) in redshift space. The candidate IEGs exhibit a number of unusual features as compared to bulge-dominated galaxies in cluster and group environments, including fainter luminosities, blue colors suggesting possible recent star formation, and smaller physical sizes. The paper is the first in a series analyzing this isolated galaxy sample.
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页数：9
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